Merge with 1.5.4 upstream package version

12 files changed, 767 insertions, 212 deletions

diff --git a/libpkgconf/buildfile b/libpkgconf/buildfile
index 9dd9fea..5231c42 100644
--- a/libpkgconf/buildfile
+++ b/libpkgconf/buildfile
@@ -22,6 +22,11 @@ tclass = $c.target.class
 # The whole idea feels utterly broken (hello cross-compilation) so we will
 # just do bare minimum and wait and see.
 #
+# There is also PERSONALITY_PATH macro added in 1.5.1. It looks like the
+# personality files are invented to fix cross-compilation but are unlikely to
+# have any noticeable distribution yet. Normally these files are located in
+# the personality.d/ subdirectory of the .pc files directory.
+#
 # @@ We should probably allow to configure these macros via configuration
 #    variables config.pkgconfig.pkg_default_path and alike.
 #
@@ -37,23 +42,32 @@ if ($tclass == "windows")
   #
   # <dir>/../lib/pkgconfig;<dir>/../share/pkgconfig
   #
-  # So we keep it empty.
+  # So we keep the macros empty.
   #
   def_paths = ""
+  personality_dirs = ""
 }
 else
 {
   inc_dirs = "/usr/include"
   lib_dirs = "/usr/lib"
 
-  def_dirs = ($install.root != [null] \
-              ? "$install.resolve($install.pkgconfig)" \
-              : "")
+  if ($install.root != [null])
+  {
+    def_dirs = "$install.resolve($install.pkgconfig)"
+    personality_dirs = "$def_dirs/personality.d"
+  }
+  else
+  {
+    def_dirs = ""
+    personality_dirs = ""
+  }
 }
 
 c.poptions += -DPKG_DEFAULT_PATH=\"$def_dirs\" \
               -DSYSTEM_INCLUDEDIR=\"$inc_dirs\"  \
-              -DSYSTEM_LIBDIR=\"$lib_dirs\"
+              -DSYSTEM_LIBDIR=\"$lib_dirs\" \
+              -DPERSONALITY_PATH=\"$personality_dirs\"
 
 # Disable warnings.
 #
@@ -101,7 +115,8 @@ if ($tclass != "windows")
   if ($tclass != "bsd" && $tclass != "macos")
     c.poptions += -D_POSIX_C_SOURCE=200112L
 
-  obj{client fragment path pkg queue tuple}: c.poptions += -D_GNU_SOURCE
+  obj{client fragment path personality pkg queue tuple}: \
+    c.poptions += -D_GNU_SOURCE
 }
 
 # Install into the pkgconf/libpkgconf/ subdirectory of, say, /usr/include/.
diff --git a/libpkgconf/client.c b/libpkgconf/client.c
index 811e043..f4155b3 100644
--- a/libpkgconf/client.c
+++ b/libpkgconf/client.c
@@ -48,17 +48,39 @@ trace_path_list(const pkgconf_client_t *client, const char *desc, pkgconf_list_t
 /*
  * !doc
  *
- * .. c:function:: void pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error_handler)
+ * .. c:function:: void pkgconf_client_dir_list_build(pkgconf_client_t *client)
+ *
+ *    Bootstraps the package search paths.  If the ``PKGCONF_PKG_PKGF_ENV_ONLY`` `flag` is set on the client,
+ *    then only the ``PKG_CONFIG_PATH`` environment variable will be used, otherwise both the
+ *    ``PKG_CONFIG_PATH`` and ``PKG_CONFIG_LIBDIR`` environment variables will be used.
+ *
+ *    :param pkgconf_client_t* client: The pkgconf client object to bootstrap.
+ *    :return: nothing
+ */
+void
+pkgconf_client_dir_list_build(pkgconf_client_t *client, const pkgconf_cross_personality_t *personality)
+{
+	pkgconf_path_build_from_environ("PKG_CONFIG_PATH", NULL, &client->dir_list, true);
+
+	if (!(client->flags & PKGCONF_PKG_PKGF_ENV_ONLY) && (pkgconf_path_build_from_environ("PKG_CONFIG_LIBDIR", NULL, &client->dir_list, true)) < 1)
+		pkgconf_path_copy_list(&client->dir_list, &personality->dir_list);
+}
+
+/*
+ * !doc
+ *
+ * .. c:function:: void pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error_handler, void *error_handler_data, const pkgconf_cross_personality_t *personality)
  *
  *    Initialise a pkgconf client object.
  *
  *    :param pkgconf_client_t* client: The client to initialise.
  *    :param pkgconf_error_handler_func_t error_handler: An optional error handler to use for logging errors.
  *    :param void* error_handler_data: user data passed to optional error handler
+ *    :param pkgconf_cross_personality_t* personality: the cross-compile personality to use for defaults
  *    :return: nothing
  */
 void
-pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error_handler, void *error_handler_data)
+pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error_handler, void *error_handler_data, const pkgconf_cross_personality_t *personality)
 {
 	client->error_handler_data = error_handler_data;
 	client->error_handler = error_handler;
@@ -70,15 +92,26 @@ pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error
 	pkgconf_client_set_error_handler(client, error_handler, error_handler_data);
 	pkgconf_client_set_warn_handler(client, NULL, NULL);
 
-	pkgconf_client_set_sysroot_dir(client, NULL);
+	pkgconf_client_set_sysroot_dir(client, personality->sysroot_dir);
 	pkgconf_client_set_buildroot_dir(client, NULL);
 	pkgconf_client_set_prefix_varname(client, NULL);
 
-	pkgconf_path_build_from_environ("PKG_CONFIG_SYSTEM_LIBRARY_PATH", SYSTEM_LIBDIR, &client->filter_libdirs, false);
-	pkgconf_path_build_from_environ("PKG_CONFIG_SYSTEM_INCLUDE_PATH", SYSTEM_INCLUDEDIR, &client->filter_includedirs, false);
+	if(getenv("PKG_CONFIG_SYSTEM_LIBRARY_PATH") == NULL)
+		pkgconf_path_copy_list(&client->filter_libdirs, &personality->filter_libdirs);
+	else
+		pkgconf_path_build_from_environ("PKG_CONFIG_SYSTEM_LIBRARY_PATH", NULL, &client->filter_libdirs, false);
+
+	if(getenv("PKG_CONFIG_SYSTEM_INCLUDE_PATH") == NULL)
+		pkgconf_path_copy_list(&client->filter_includedirs, &personality->filter_includedirs);
+	else
+		pkgconf_path_build_from_environ("PKG_CONFIG_SYSTEM_INCLUDE_PATH", NULL, &client->filter_includedirs, false);
 
 	/* GCC uses these environment variables to define system include paths, so we should check them. */
+#ifdef __HAIKU__
+	pkgconf_path_build_from_environ("BELIBRARIES", NULL, &client->filter_libdirs, false);
+#else
 	pkgconf_path_build_from_environ("LIBRARY_PATH", NULL, &client->filter_libdirs, false);
+#endif
 	pkgconf_path_build_from_environ("CPATH", NULL, &client->filter_includedirs, false);
 	pkgconf_path_build_from_environ("C_INCLUDE_PATH", NULL, &client->filter_includedirs, false);
 	pkgconf_path_build_from_environ("CPLUS_INCLUDE_PATH", NULL, &client->filter_includedirs, false);
@@ -98,20 +131,21 @@ pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error
 /*
  * !doc
  *
- * .. c:function:: pkgconf_client_t* pkgconf_client_new(pkgconf_error_handler_func_t error_handler)
+ * .. c:function:: pkgconf_client_t* pkgconf_client_new(pkgconf_error_handler_func_t error_handler, void *error_handler_data, const pkgconf_cross_personality_t *personality)
  *
  *    Allocate and initialise a pkgconf client object.
  *
  *    :param pkgconf_error_handler_func_t error_handler: An optional error handler to use for logging errors.
  *    :param void* error_handler_data: user data passed to optional error handler
+ *    :param pkgconf_cross_personality_t* personality: cross-compile personality to use
  *    :return: A pkgconf client object.
  *    :rtype: pkgconf_client_t*
  */
 pkgconf_client_t *
-pkgconf_client_new(pkgconf_error_handler_func_t error_handler, void *error_handler_data)
+pkgconf_client_new(pkgconf_error_handler_func_t error_handler, void *error_handler_data, const pkgconf_cross_personality_t *personality)
 {
 	pkgconf_client_t *out = calloc(sizeof(pkgconf_client_t), 1);
-	pkgconf_client_init(out, error_handler, error_handler_data);
+	pkgconf_client_init(out, error_handler, error_handler_data, personality);
 	return out;
 }
 
@@ -324,7 +358,7 @@ pkgconf_trace(const pkgconf_client_t *client, const char *filename, size_t linen
 	size_t len;
 	va_list va;
 
-	if (client == NULL)
+	if (client == NULL || client->trace_handler == NULL)
 		return false;
 
 	len = snprintf(errbuf, sizeof errbuf, "%s:" SIZE_FMT_SPECIFIER " [%s]: ", filename, lineno, funcname);
diff --git a/libpkgconf/config.h b/libpkgconf/config.h
index 9b83361..c490624 100644
--- a/libpkgconf/config.h
+++ b/libpkgconf/config.h
@@ -33,4 +33,4 @@
  */
 #define HAVE_SYS_STAT_H 1
 
-#define PACKAGE_BUGREPORT "http://github.com/pkgconf/pkgconf/issues"
+#define PACKAGE_BUGREPORT "https://git.dereferenced.org/pkgconf/pkgconf/issues"
diff --git a/libpkgconf/dependency.c b/libpkgconf/dependency.c
index cd01a06..b3722b1 100644
--- a/libpkgconf/dependency.c
+++ b/libpkgconf/dependency.c
@@ -52,11 +52,76 @@ dependency_to_str(const pkgconf_dependency_t *dep, char *buf, size_t buflen)
 	return buf;
 }
 
+/* find a colliding dependency that is coloured differently */
 static inline pkgconf_dependency_t *
-pkgconf_dependency_addraw(const pkgconf_client_t *client, pkgconf_list_t *list, const char *package, size_t package_sz, const char *version, size_t version_sz, pkgconf_pkg_comparator_t compare)
+find_colliding_dependency(const pkgconf_dependency_t *dep, const pkgconf_list_t *list)
+{
+	const pkgconf_node_t *n;
+
+	PKGCONF_FOREACH_LIST_ENTRY(list->head, n)
+	{
+		pkgconf_dependency_t *dep2 = n->data;
+
+		if (strcmp(dep->package, dep2->package))
+			continue;
+
+		if (dep->flags != dep2->flags)
+			return dep2;
+	}
+
+	return NULL;
+}
+
+static inline pkgconf_dependency_t *
+add_or_replace_dependency_node(const pkgconf_client_t *client, pkgconf_dependency_t *dep, pkgconf_list_t *list)
 {
-	pkgconf_dependency_t *dep;
 	char depbuf[PKGCONF_ITEM_SIZE];
+	pkgconf_dependency_t *dep2 = find_colliding_dependency(dep, list);
+
+	/* there is already a node in the graph which describes this dependency */
+	if (dep2 != NULL)
+	{
+		char depbuf2[PKGCONF_ITEM_SIZE];
+
+		PKGCONF_TRACE(client, "dependency collision: [%s/%x] -- [%s/%x]",
+			      dependency_to_str(dep, depbuf, sizeof depbuf), dep->flags,
+			      dependency_to_str(dep2, depbuf2, sizeof depbuf2), dep2->flags);
+
+		/* prefer the uncoloured node, either dep or dep2 */
+		if (dep->flags && dep2->flags == 0)
+		{
+			PKGCONF_TRACE(client, "dropping dependency [%s]@%p because of collision", depbuf, dep);
+
+			free(dep);
+			return NULL;
+		}
+		else if (dep2->flags && dep->flags == 0)
+		{
+			PKGCONF_TRACE(client, "dropping dependency [%s]@%p because of collision", depbuf2, dep2);
+
+			pkgconf_node_delete(&dep2->iter, list);
+			free(dep2);
+		}
+		else
+			/* If both dependencies have equal strength, we keep both, because of situations like:
+			 *    Requires: foo > 1, foo < 3
+			 *
+			 * If the situation is that both dependencies are literally equal, it is still harmless because
+			 * fragment deduplication will handle the excessive fragments.
+			 */
+			PKGCONF_TRACE(client, "keeping both dependencies (harmless)");
+	}
+
+	PKGCONF_TRACE(client, "added dependency [%s] to list @%p; flags=%x", dependency_to_str(dep, depbuf, sizeof depbuf), list, dep->flags);
+	pkgconf_node_insert_tail(&dep->iter, dep, list);
+
+	return dep;
+}
+
+static inline pkgconf_dependency_t *
+pkgconf_dependency_addraw(const pkgconf_client_t *client, pkgconf_list_t *list, const char *package, size_t package_sz, const char *version, size_t version_sz, pkgconf_pkg_comparator_t compare, unsigned int flags)
+{
+	pkgconf_dependency_t *dep;
 
 	dep = calloc(sizeof(pkgconf_dependency_t), 1);
 	dep->package = pkgconf_strndup(package, package_sz);
@@ -65,11 +130,9 @@ pkgconf_dependency_addraw(const pkgconf_client_t *client, pkgconf_list_t *list,
 		dep->version = pkgconf_strndup(version, version_sz);
 
 	dep->compare = compare;
+	dep->flags = flags;
 
-	PKGCONF_TRACE(client, "added dependency [%s] to list @%p", dependency_to_str(dep, depbuf, sizeof depbuf), list);
-	pkgconf_node_insert_tail(&dep->iter, dep, list);
-
-	return dep;
+	return add_or_replace_dependency_node(client, dep, list);
 }
 
 /*
@@ -84,16 +147,17 @@ pkgconf_dependency_addraw(const pkgconf_client_t *client, pkgconf_list_t *list,
  *    :param char* package: The package `atom` to set on the dependency node.
  *    :param char* version: The package `version` to set on the dependency node.
  *    :param pkgconf_pkg_comparator_t compare: The comparison operator to set on the dependency node.
+ *    :param uint flags: Any flags to attach to the dependency node.
  *    :return: A dependency node.
  *    :rtype: pkgconf_dependency_t *
  */
 pkgconf_dependency_t *
-pkgconf_dependency_add(const pkgconf_client_t *client, pkgconf_list_t *list, const char *package, const char *version, pkgconf_pkg_comparator_t compare)
+pkgconf_dependency_add(const pkgconf_client_t *client, pkgconf_list_t *list, const char *package, const char *version, pkgconf_pkg_comparator_t compare, unsigned int flags)
 {
 	if (version != NULL)
-		return pkgconf_dependency_addraw(client, list, package, strlen(package), version, strlen(version), compare);
+		return pkgconf_dependency_addraw(client, list, package, strlen(package), version, strlen(version), compare, flags);
 
-	return pkgconf_dependency_addraw(client, list, package, strlen(package), NULL, 0, compare);
+	return pkgconf_dependency_addraw(client, list, package, strlen(package), NULL, 0, compare, flags);
 }
 
 /*
@@ -157,10 +221,11 @@ pkgconf_dependency_free(pkgconf_list_t *list)
  *    :param pkgconf_client_t* client: The client object that owns the package this dependency list belongs to.
  *    :param pkgconf_list_t* deplist_head: The dependency list to populate with dependency nodes.
  *    :param char* depends: The dependency data to parse.
+ *    :param uint flags: Any flags to attach to the dependency nodes.
  *    :return: nothing
  */
 void
-pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *deplist_head, const char *depends)
+pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *deplist_head, const char *depends, unsigned int flags)
 {
 	parse_state_t state = OUTSIDE_MODULE;
 	pkgconf_pkg_comparator_t compare = PKGCONF_CMP_ANY;
@@ -227,7 +292,7 @@ pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *dep
 
 			if (state == OUTSIDE_MODULE)
 			{
-				pkgconf_dependency_addraw(client, deplist_head, package, package_sz, NULL, 0, compare);
+				pkgconf_dependency_addraw(client, deplist_head, package, package_sz, NULL, 0, compare, flags);
 
 				compare = PKGCONF_CMP_ANY;
 				package_sz = 0;
@@ -270,7 +335,7 @@ pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *dep
 				version_sz = ptr - vstart;
 				state = OUTSIDE_MODULE;
 
-				pkgconf_dependency_addraw(client, deplist_head, package, package_sz, version, version_sz, compare);
+				pkgconf_dependency_addraw(client, deplist_head, package, package_sz, version, version_sz, compare, flags);
 
 				compare = PKGCONF_CMP_ANY;
 				cnameptr = cmpname;
@@ -300,13 +365,14 @@ pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *dep
  *    :param pkgconf_pkg_t* pkg: The package object that owns this dependency list.
  *    :param pkgconf_list_t* deplist: The dependency list to populate with dependency nodes.
  *    :param char* depends: The dependency data to parse.
+ *    :param uint flags: Any flags to attach to the dependency nodes.
  *    :return: nothing
  */
 void
-pkgconf_dependency_parse(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, pkgconf_list_t *deplist, const char *depends)
+pkgconf_dependency_parse(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, pkgconf_list_t *deplist, const char *depends, unsigned int flags)
 {
 	char *kvdepends = pkgconf_tuple_parse(client, &pkg->vars, depends);
 
-	pkgconf_dependency_parse_str(client, deplist, kvdepends);
+	pkgconf_dependency_parse_str(client, deplist, kvdepends, flags);
 	free(kvdepends);
 }
diff --git a/libpkgconf/libpkgconf.h b/libpkgconf/libpkgconf.h
index 0e8d83e..3e8db08 100644
--- a/libpkgconf/libpkgconf.h
+++ b/libpkgconf/libpkgconf.h
@@ -20,9 +20,9 @@
 #include <stdarg.h>
 #include <stddef.h>
 #include <stdbool.h>
+#include <libpkgconf/libpkgconf-api.h>
 #include <libpkgconf/iter.h>
 #include <libpkgconf/bsdstubs.h>
-#include <libpkgconf/libpkgconf-api.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -61,6 +61,7 @@ typedef struct pkgconf_tuple_ pkgconf_tuple_t;
 typedef struct pkgconf_fragment_ pkgconf_fragment_t;
 typedef struct pkgconf_path_ pkgconf_path_t;
 typedef struct pkgconf_client_ pkgconf_client_t;
+typedef struct pkgconf_cross_personality_ pkgconf_cross_personality_t;
 
 #define PKGCONF_ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
 
@@ -90,6 +91,8 @@ struct pkgconf_dependency_ {
 	char *version;
 	pkgconf_pkg_t *parent;
 	pkgconf_pkg_t *match;
+
+	unsigned int flags;
 };
 
 struct pkgconf_tuple_ {
@@ -141,6 +144,12 @@ struct pkgconf_pkg_ {
 	unsigned int flags;
 
 	pkgconf_client_t *owner;
+
+	/* these resources are owned by the package and do not need special management,
+	 * under no circumstance attempt to allocate or free objects belonging to these pointers
+	 */
+	pkgconf_tuple_t *orig_prefix;
+	pkgconf_tuple_t *prefix;
 };
 
 typedef bool (*pkgconf_pkg_iteration_func_t)(const pkgconf_pkg_t *pkg, void *data);
@@ -177,9 +186,20 @@ struct pkgconf_client_ {
 	bool already_sent_notice;
 };
 
+struct pkgconf_cross_personality_ {
+	const char *name;
+
+	pkgconf_list_t dir_list;
+
+	pkgconf_list_t filter_libdirs;
+	pkgconf_list_t filter_includedirs;
+
+	char *sysroot_dir;
+};
+
 /* client.c */
-PKGCONF_API void pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error_handler, void *error_handler_data);
-PKGCONF_API pkgconf_client_t * pkgconf_client_new(pkgconf_error_handler_func_t error_handler, void *error_handler_data);
+PKGCONF_API void pkgconf_client_init(pkgconf_client_t *client, pkgconf_error_handler_func_t error_handler, void *error_handler_data, const pkgconf_cross_personality_t *personality);
+PKGCONF_API pkgconf_client_t * pkgconf_client_new(pkgconf_error_handler_func_t error_handler, void *error_handler_data, const pkgconf_cross_personality_t *personality);
 PKGCONF_API void pkgconf_client_deinit(pkgconf_client_t *client);
 PKGCONF_API void pkgconf_client_free(pkgconf_client_t *client);
 PKGCONF_API const char *pkgconf_client_get_sysroot_dir(const pkgconf_client_t *client);
@@ -196,6 +216,11 @@ PKGCONF_API pkgconf_error_handler_func_t pkgconf_client_get_error_handler(const
 PKGCONF_API void pkgconf_client_set_error_handler(pkgconf_client_t *client, pkgconf_error_handler_func_t error_handler, void *error_handler_data);
 PKGCONF_API pkgconf_error_handler_func_t pkgconf_client_get_trace_handler(const pkgconf_client_t *client);
 PKGCONF_API void pkgconf_client_set_trace_handler(pkgconf_client_t *client, pkgconf_error_handler_func_t trace_handler, void *trace_handler_data);
+PKGCONF_API void pkgconf_client_dir_list_build(pkgconf_client_t *client, const pkgconf_cross_personality_t *personality);
+
+/* personality.c */
+PKGCONF_API pkgconf_cross_personality_t *pkgconf_cross_personality_default(void);
+PKGCONF_API pkgconf_cross_personality_t *pkgconf_cross_personality_find(const char *triplet);
 
 #define PKGCONF_IS_MODULE_SEPARATOR(c) ((c) == ',' || isspace ((unsigned int)(c)))
 #define PKGCONF_IS_OPERATOR_CHAR(c) ((c) == '<' || (c) == '>' || (c) == '!' || (c) == '=')
@@ -214,6 +239,9 @@ PKGCONF_API void pkgconf_client_set_trace_handler(pkgconf_client_t *client, pkgc
 #define PKGCONF_PKG_PKGF_REDEFINE_PREFIX		0x0400
 #define PKGCONF_PKG_PKGF_DONT_RELOCATE_PATHS		0x0800
 #define PKGCONF_PKG_PKGF_SIMPLIFY_ERRORS		0x1000
+#define PKGCONF_PKG_PKGF_DONT_FILTER_INTERNAL_CFLAGS	0x2000
+
+#define PKGCONF_PKG_DEPF_INTERNAL		0x1
 
 #define PKGCONF_PKG_ERRF_OK			0x0
 #define PKGCONF_PKG_ERRF_PACKAGE_NOT_FOUND	0x1
@@ -221,7 +249,6 @@ PKGCONF_API void pkgconf_client_set_trace_handler(pkgconf_client_t *client, pkgc
 #define PKGCONF_PKG_ERRF_PACKAGE_CONFLICT	0x4
 #define PKGCONF_PKG_ERRF_DEPGRAPH_BREAK		0x8
 
-/* pkg.c */
 #if defined(__GNUC__) || defined(__INTEL_COMPILER)
 #define PRINTFLIKE(fmtarg, firstvararg) \
         __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
@@ -232,6 +259,13 @@ PKGCONF_API void pkgconf_client_set_trace_handler(pkgconf_client_t *client, pkgc
 #define DEPRECATED
 #endif /* defined(__INTEL_COMPILER) || defined(__GNUC__) */
 
+/* parser.c */
+typedef void (*pkgconf_parser_operand_func_t)(void *data, const size_t lineno, const char *key, const char *value);
+typedef void (*pkgconf_parser_warn_func_t)(void *data, const char *fmt, ...);
+
+PKGCONF_API void pkgconf_parser_parse(FILE *f, void *data, const pkgconf_parser_operand_func_t *ops, const pkgconf_parser_warn_func_t warnfunc, const char *filename);
+
+/* pkg.c */
 PKGCONF_API bool pkgconf_error(const pkgconf_client_t *client, const char *format, ...) PRINTFLIKE(2, 3);
 PKGCONF_API bool pkgconf_warn(const pkgconf_client_t *client, const char *format, ...) PRINTFLIKE(2, 3);
 PKGCONF_API bool pkgconf_trace(const pkgconf_client_t *client, const char *filename, size_t lineno, const char *funcname, const char *format, ...) PRINTFLIKE(5, 6);
@@ -251,7 +285,7 @@ PKGCONF_API pkgconf_pkg_t *pkgconf_pkg_ref(pkgconf_client_t *client, pkgconf_pkg
 PKGCONF_API void pkgconf_pkg_unref(pkgconf_client_t *client, pkgconf_pkg_t *pkg);
 PKGCONF_API void pkgconf_pkg_free(pkgconf_client_t *client, pkgconf_pkg_t *pkg);
 PKGCONF_API pkgconf_pkg_t *pkgconf_pkg_find(pkgconf_client_t *client, const char *name);
-PKGCONF_API unsigned int pkgconf_pkg_traverse(pkgconf_client_t *client, pkgconf_pkg_t *root, pkgconf_pkg_traverse_func_t func, void *data, int maxdepth);
+PKGCONF_API unsigned int pkgconf_pkg_traverse(pkgconf_client_t *client, pkgconf_pkg_t *root, pkgconf_pkg_traverse_func_t func, void *data, int maxdepth, unsigned int skip_flags);
 PKGCONF_API unsigned int pkgconf_pkg_verify_graph(pkgconf_client_t *client, pkgconf_pkg_t *root, int depth);
 PKGCONF_API pkgconf_pkg_t *pkgconf_pkg_verify_dependency(pkgconf_client_t *client, pkgconf_dependency_t *pkgdep, unsigned int *eflags);
 PKGCONF_API const char *pkgconf_pkg_get_comparator(const pkgconf_dependency_t *pkgdep);
@@ -262,15 +296,14 @@ PKGCONF_API pkgconf_pkg_t *pkgconf_builtin_pkg_get(const char *name);
 
 PKGCONF_API int pkgconf_compare_version(const char *a, const char *b);
 PKGCONF_API pkgconf_pkg_t *pkgconf_scan_all(pkgconf_client_t *client, void *ptr, pkgconf_pkg_iteration_func_t func);
-PKGCONF_API void pkgconf_pkg_dir_list_build(pkgconf_client_t *client);
 
 /* parse.c */
 PKGCONF_API pkgconf_pkg_t *pkgconf_pkg_new_from_file(pkgconf_client_t *client, const char *path, FILE *f);
-PKGCONF_API void pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *deplist_head, const char *depends);
-PKGCONF_API void pkgconf_dependency_parse(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, pkgconf_list_t *deplist_head, const char *depends);
+PKGCONF_API void pkgconf_dependency_parse_str(const pkgconf_client_t *client, pkgconf_list_t *deplist_head, const char *depends, unsigned int flags);
+PKGCONF_API void pkgconf_dependency_parse(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, pkgconf_list_t *deplist_head, const char *depends, unsigned int flags);
 PKGCONF_API void pkgconf_dependency_append(pkgconf_list_t *list, pkgconf_dependency_t *tail);
 PKGCONF_API void pkgconf_dependency_free(pkgconf_list_t *list);
-PKGCONF_API pkgconf_dependency_t *pkgconf_dependency_add(const pkgconf_client_t *client, pkgconf_list_t *list, const char *package, const char *version, pkgconf_pkg_comparator_t compare);
+PKGCONF_API pkgconf_dependency_t *pkgconf_dependency_add(const pkgconf_client_t *client, pkgconf_list_t *list, const char *package, const char *version, pkgconf_pkg_comparator_t compare, unsigned int flags);
 
 /* argvsplit.c */
 PKGCONF_API int pkgconf_argv_split(const char *src, int *argc, char ***argv);
@@ -333,6 +366,7 @@ PKGCONF_API size_t pkgconf_path_build_from_environ(const char *envvarname, const
 PKGCONF_API bool pkgconf_path_match_list(const char *path, const pkgconf_list_t *dirlist);
 PKGCONF_API void pkgconf_path_free(pkgconf_list_t *dirlist);
 PKGCONF_API bool pkgconf_path_relocate(char *buf, size_t buflen);
+PKGCONF_API void pkgconf_path_copy_list(pkgconf_list_t *dst, const pkgconf_list_t *src);
 
 #ifdef __cplusplus
 }
diff --git a/libpkgconf/parser.c b/libpkgconf/parser.c
new file mode 100644
index 0000000..704c4de
--- /dev/null
+++ b/libpkgconf/parser.c
@@ -0,0 +1,95 @@
+/*
+ * parser.c
+ * rfc822 message parser
+ *
+ * Copyright (c) 2018 pkgconf authors (see AUTHORS).
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * This software is provided 'as is' and without any warranty, express or
+ * implied.  In no event shall the authors be liable for any damages arising
+ * from the use of this software.
+ */
+
+#include <libpkgconf/stdinc.h>
+#include <libpkgconf/config.h>
+#include <libpkgconf/libpkgconf.h>
+
+/*
+ * !doc
+ *
+ * .. c:function:: pkgconf_pkg_t *pkgconf_pkg_new_from_file(const pkgconf_client_t *client, const char *filename, FILE *f)
+ *
+ *    Parse a .pc file into a pkgconf_pkg_t object structure.
+ *
+ *    :param pkgconf_client_t* client: The pkgconf client object to use for dependency resolution.
+ *    :param char* filename: The filename of the package file (including full path).
+ *    :param FILE* f: The file object to read from.
+ *    :returns: A ``pkgconf_pkg_t`` object which contains the package data.
+ *    :rtype: pkgconf_pkg_t *
+ */
+void
+pkgconf_parser_parse(FILE *f, void *data, const pkgconf_parser_operand_func_t *ops, const pkgconf_parser_warn_func_t warnfunc, const char *filename)
+{
+	char readbuf[PKGCONF_BUFSIZE];
+	size_t lineno = 0;
+
+	while (pkgconf_fgetline(readbuf, PKGCONF_BUFSIZE, f) != NULL)
+	{
+		char op, *p, *key, *value;
+		bool warned_key_whitespace = false, warned_value_whitespace = false;
+
+		lineno++;
+
+		p = readbuf;
+		while (*p && (isalpha((unsigned int)*p) || isdigit((unsigned int)*p) || *p == '_' || *p == '.'))
+			p++;
+
+		key = readbuf;
+		if (!isalpha((unsigned int)*key) && !isdigit((unsigned int)*p))
+			continue;
+
+		while (*p && isspace((unsigned int)*p))
+		{
+			if (!warned_key_whitespace)
+			{
+				warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: whitespace encountered while parsing key section\n",
+					filename, lineno);
+				warned_key_whitespace = true;
+			}
+
+			/* set to null to avoid trailing spaces in key */
+			*p = '\0';
+			p++;
+		}
+
+		op = *p;
+		*p = '\0';
+		p++;
+
+		while (*p && isspace((unsigned int)*p))
+			p++;
+
+		value = p;
+		p = value + (strlen(value) - 1);
+		while (*p && isspace((unsigned int) *p) && p > value)
+		{
+			if (!warned_value_whitespace && op == '=')
+			{
+				warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: trailing whitespace encountered while parsing value section\n",
+					filename, lineno);
+				warned_value_whitespace = true;
+			}
+
+			*p = '\0';
+			p--;
+		}
+
+		if (ops[(unsigned char) op])
+			ops[(unsigned char) op](data, lineno, key, value);
+	}
+
+	fclose(f);
+}
diff --git a/libpkgconf/path.c b/libpkgconf/path.c
index 2f4cfbb..02d1c97 100644
--- a/libpkgconf/path.c
+++ b/libpkgconf/path.c
@@ -225,6 +225,38 @@ pkgconf_path_match_list(const char *path, const pkgconf_list_t *dirlist)
 /*
  * !doc
  *
+ * .. c:function:: void pkgconf_path_copy_list(pkgconf_list_t *dst, const pkgconf_list_t *src)
+ *
+ *    Copies a path list to another path list.
+ *
+ *    :param pkgconf_list_t* dst: The path list to copy to.
+ *    :param pkgconf_list_t* src: The path list to copy from.
+ *    :return: nothing
+ */
+void
+pkgconf_path_copy_list(pkgconf_list_t *dst, const pkgconf_list_t *src)
+{
+	pkgconf_node_t *n;
+
+	PKGCONF_FOREACH_LIST_ENTRY(src->head, n)
+	{
+		pkgconf_path_t *srcpath = n->data, *path;
+
+		path = calloc(sizeof(pkgconf_path_t), 1);
+		path->path = strdup(srcpath->path);
+
+#ifdef PKGCONF_CACHE_INODES
+		path->handle_path = srcpath->handle_path;
+		path->handle_device = srcpath->handle_device;
+#endif
+
+		pkgconf_node_insert_tail(&path->lnode, path, dst);
+	}
+}
+
+/*
+ * !doc
+ *
  * .. c:function:: void pkgconf_path_free(pkgconf_list_t *dirlist)
  *
  *    Releases any path nodes attached to the given path list.
diff --git a/libpkgconf/personality.c b/libpkgconf/personality.c
new file mode 100644
index 0000000..a15f8cf
--- /dev/null
+++ b/libpkgconf/personality.c
@@ -0,0 +1,251 @@
+/*
+ * personality.c
+ * libpkgconf cross-compile personality database
+ *
+ * Copyright (c) 2018 pkgconf authors (see AUTHORS).
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * This software is provided 'as is' and without any warranty, express or
+ * implied.  In no event shall the authors be liable for any damages arising
+ * from the use of this software.
+ */
+
+#include <libpkgconf/stdinc.h>
+#include <libpkgconf/libpkgconf.h>
+#include <libpkgconf/config.h>
+
+#ifdef _WIN32
+#	define strcasecmp _stricmp
+#endif
+
+static bool default_personality_init = false;
+static pkgconf_cross_personality_t default_personality = {
+	.name = "default",
+};
+
+static inline void
+build_default_search_path(pkgconf_list_t* dirlist)
+{
+#ifdef _WIN32
+	char namebuf[MAX_PATH];
+	char outbuf[MAX_PATH];
+	char *p;
+
+	int sizepath = GetModuleFileName(NULL, namebuf, sizeof namebuf);
+	char * winslash;
+	namebuf[sizepath] = '\0';
+	while ((winslash = strchr (namebuf, '\\')) != NULL)
+	{
+		*winslash = '/';
+	}
+	p = strrchr(namebuf, '/');
+	if (p == NULL)
+		pkgconf_path_split(PKG_DEFAULT_PATH, dirlist, true);
+
+	*p = '\0';
+	pkgconf_strlcpy(outbuf, namebuf, sizeof outbuf);
+	pkgconf_strlcat(outbuf, "/", sizeof outbuf);
+	pkgconf_strlcat(outbuf, "../lib/pkgconfig", sizeof outbuf);
+	pkgconf_path_add(outbuf, dirlist, true);
+	pkgconf_strlcpy(outbuf, namebuf, sizeof outbuf);
+	pkgconf_strlcat(outbuf, "/", sizeof outbuf);
+	pkgconf_strlcat(outbuf, "../share/pkgconfig", sizeof outbuf);
+	pkgconf_path_add(outbuf, dirlist, true);
+#elif __HAIKU__
+	char **paths;
+	size_t count;
+	if (find_paths(B_FIND_PATH_DEVELOP_LIB_DIRECTORY, "pkgconfig", &paths, &count) == B_OK) {
+		for (size_t i = 0; i < count; i++)
+			pkgconf_path_add(paths[i], dirlist, true);
+		free(paths);
+		paths = NULL;
+	}
+	if (find_paths(B_FIND_PATH_DATA_DIRECTORY, "pkgconfig", &paths, &count) == B_OK) {
+		for (size_t i = 0; i < count; i++)
+			pkgconf_path_add(paths[i], dirlist, true);
+		free(paths);
+		paths = NULL;
+	}
+#else
+	pkgconf_path_split(PKG_DEFAULT_PATH, dirlist, true);
+#endif
+}
+
+/*
+ * !doc
+ *
+ * .. c:function:: const pkgconf_cross_personality_t *pkgconf_cross_personality_default(void)
+ *
+ *    Returns the default cross-compile personality.
+ *
+ *    :rtype: pkgconf_cross_personality_t*
+ *    :return: the default cross-compile personality
+ */
+pkgconf_cross_personality_t *
+pkgconf_cross_personality_default(void)
+{
+	if (default_personality_init)
+		return &default_personality;
+
+	build_default_search_path(&default_personality.dir_list);
+
+	pkgconf_path_split(SYSTEM_LIBDIR, &default_personality.filter_libdirs, true);
+	pkgconf_path_split(SYSTEM_INCLUDEDIR, &default_personality.filter_includedirs, true);
+
+	default_personality_init = true;
+	return &default_personality;
+}
+
+static bool
+valid_triplet(const char *triplet)
+{
+	const char *c = triplet;
+
+	for (; *c; c++)
+		if (!isalnum(*c) && *c != '-' && *c != '_')
+			return false;
+
+	return true;
+}
+
+typedef void (*personality_keyword_func_t)(pkgconf_cross_personality_t *p, const char *keyword, const size_t lineno, const ptrdiff_t offset, char *value);
+typedef struct {
+	const char *keyword;
+	const personality_keyword_func_t func;
+	const ptrdiff_t offset;
+} personality_keyword_pair_t;
+
+static void
+personality_copy_func(pkgconf_cross_personality_t *p, const char *keyword, const size_t lineno, const ptrdiff_t offset, char *value)
+{
+	(void) keyword;
+	(void) lineno;
+
+	char **dest = (char **)((char *) p + offset);
+	*dest = strdup(value);
+}
+
+static void
+personality_fragment_func(pkgconf_cross_personality_t *p, const char *keyword, const size_t lineno, const ptrdiff_t offset, char *value)
+{
+	(void) keyword;
+	(void) lineno;
+
+	pkgconf_list_t *dest = (pkgconf_list_t *)((char *) p + offset);
+	pkgconf_path_split(value, dest, false);
+}
+
+/* keep in alphabetical order! */
+static const personality_keyword_pair_t personality_keyword_pairs[] = {
+	{"DefaultSearchPaths", personality_fragment_func, offsetof(pkgconf_cross_personality_t, dir_list)},
+	{"SysrootDir", personality_copy_func, offsetof(pkgconf_cross_personality_t, sysroot_dir)},
+	{"SystemIncludePaths", personality_fragment_func, offsetof(pkgconf_cross_personality_t, filter_includedirs)},
+	{"SystemLibraryPaths", personality_fragment_func, offsetof(pkgconf_cross_personality_t, filter_libdirs)},
+	{"Triplet", personality_copy_func, offsetof(pkgconf_cross_personality_t, name)},
+};
+
+static int
+personality_keyword_pair_cmp(const void *key, const void *ptr)
+{
+	const personality_keyword_pair_t *pair = ptr;
+	return strcasecmp(key, pair->keyword);
+}
+
+static void
+personality_keyword_set(pkgconf_cross_personality_t *p, const size_t lineno, const char *keyword, char *value)
+{
+	const personality_keyword_pair_t *pair = bsearch(keyword,
+		personality_keyword_pairs, PKGCONF_ARRAY_SIZE(personality_keyword_pairs),
+		sizeof(personality_keyword_pair_t), personality_keyword_pair_cmp);
+
+	if (pair == NULL || pair->func == NULL)
+		return;
+
+	pair->func(p, keyword, lineno, pair->offset, value);
+}
+
+static const pkgconf_parser_operand_func_t personality_parser_ops[] = {
+	[':'] = (pkgconf_parser_operand_func_t) personality_keyword_set
+};
+
+static void personality_warn_func(void *p, const char *fmt, ...) PRINTFLIKE(2, 3);
+
+static void
+personality_warn_func(void *p, const char *fmt, ...)
+{
+	va_list va;
+
+	(void) p;
+
+	va_start(va, fmt);
+	vfprintf(stderr, fmt, va);
+	va_end(va);
+}
+
+static pkgconf_cross_personality_t *
+load_personality_with_path(const char *path, const char *triplet)
+{
+	char pathbuf[PKGCONF_ITEM_SIZE];
+	FILE *f;
+	pkgconf_cross_personality_t *p;
+
+	/* if triplet is null, assume that path is a direct path to the personality file */
+	if (triplet != NULL)
+		snprintf(pathbuf, sizeof pathbuf, "%s/%s.personality", path, triplet);
+	else
+		pkgconf_strlcpy(pathbuf, path, sizeof pathbuf);
+
+	f = fopen(pathbuf, "r");
+	if (f == NULL)
+		return NULL;
+
+	p = calloc(sizeof(pkgconf_cross_personality_t), 1);
+	if (triplet != NULL)
+		p->name = strdup(triplet);
+	pkgconf_parser_parse(f, p, personality_parser_ops, personality_warn_func, pathbuf);
+
+	return p;
+}
+
+/*
+ * !doc
+ *
+ * .. c:function:: pkgconf_cross_personality_t *pkgconf_cross_personality_find(const char *triplet)
+ *
+ *    Attempts to find a cross-compile personality given a triplet.
+ *
+ *    :rtype: pkgconf_cross_personality_t*
+ *    :return: the default cross-compile personality
+ */
+pkgconf_cross_personality_t *
+pkgconf_cross_personality_find(const char *triplet)
+{
+	pkgconf_list_t plist = PKGCONF_LIST_INITIALIZER;
+	pkgconf_node_t *n;
+	pkgconf_cross_personality_t *out = NULL;
+
+	out = load_personality_with_path(triplet, NULL);
+	if (out != NULL)
+		return out;
+
+	if (!valid_triplet(triplet))
+		return NULL;
+
+	pkgconf_path_split(PERSONALITY_PATH, &plist, true);
+
+	PKGCONF_FOREACH_LIST_ENTRY(plist.head, n)
+	{
+		pkgconf_path_t *pn = n->data;
+
+		out = load_personality_with_path(pn->path, triplet);
+		if (out != NULL)
+			goto finish;
+	}
+
+finish:
+	pkgconf_path_free(&plist);
+	return out;
+}
diff --git a/libpkgconf/pkg.c b/libpkgconf/pkg.c
index 0feb4d6..24ace6f 100644
--- a/libpkgconf/pkg.c
+++ b/libpkgconf/pkg.c
@@ -49,80 +49,19 @@ str_has_suffix(const char *str, const char *suffix)
 	return !strncasecmp(str + str_len - suf_len, suffix, suf_len);
 }
 
-static inline const char *
-get_default_pkgconfig_path(char *outbuf, size_t outlen)
+static char *
+pkg_get_parent_dir(pkgconf_pkg_t *pkg)
 {
-#ifdef _WIN32
-	char namebuf[MAX_PATH];
-	char *p;
-
-	int sizepath = GetModuleFileName(NULL, namebuf, sizeof namebuf);
-	char * winslash;
-	namebuf[sizepath] = '\0';
-	while ((winslash = strchr (namebuf, '\\')) != NULL)
-	{
-		*winslash = '/';
-	}
-	p = strrchr(namebuf, '/');
-	if (p == NULL)
-		return PKG_DEFAULT_PATH;
-
-	*p = '\0';
-	pkgconf_strlcpy(outbuf, namebuf, outlen);
-	pkgconf_strlcat(outbuf, "/", outlen);
-	pkgconf_strlcat(outbuf, "../lib/pkgconfig", outlen);
-	pkgconf_strlcat(outbuf, ";", outlen);
-	pkgconf_strlcat(outbuf, namebuf, outlen);
-	pkgconf_strlcat(outbuf, "/", outlen);
-	pkgconf_strlcat(outbuf, "../share/pkgconfig", outlen);
-
-	return outbuf;
-#else
-	(void) outbuf;
-	(void) outlen;
-#endif
-
-	return PKG_DEFAULT_PATH;
-}
-
-static const char *
-pkg_get_parent_dir(pkgconf_pkg_t *pkg, char *buf, size_t buflen)
-{
-	char *pathbuf;
+	char buf[PKGCONF_ITEM_SIZE], *pathbuf;
 
-	pkgconf_strlcpy(buf, pkg->filename, buflen);
+	pkgconf_strlcpy(buf, pkg->filename, sizeof buf);
 	pathbuf = strrchr(buf, PKG_DIR_SEP_S);
 	if (pathbuf == NULL)
 		pathbuf = strrchr(buf, '/');
 	if (pathbuf != NULL)
 		pathbuf[0] = '\0';
 
-	return buf;
-}
-
-/*
- * !doc
- *
- * .. c:function:: void pkgconf_pkg_dir_list_build(pkgconf_client_t *client)
- *
- *    Bootstraps the package search paths.  If the ``PKGCONF_PKG_PKGF_ENV_ONLY`` `flag` is set on the client,
- *    then only the ``PKG_CONFIG_PATH`` environment variable will be used, otherwise both the
- *    ``PKG_CONFIG_PATH`` and ``PKG_CONFIG_LIBDIR`` environment variables will be used.
- *
- *    :param pkgconf_client_t* client: The pkgconf client object to bootstrap.
- *    :return: nothing
- */
-void
-pkgconf_pkg_dir_list_build(pkgconf_client_t *client)
-{
-	pkgconf_path_build_from_environ("PKG_CONFIG_PATH", NULL, &client->dir_list, true);
-
-	if (!(client->flags & PKGCONF_PKG_PKGF_ENV_ONLY))
-	{
-		char pathbuf[PKGCONF_BUFSIZE];
-
-		pkgconf_path_build_from_environ("PKG_CONFIG_LIBDIR", get_default_pkgconfig_path(pathbuf, sizeof pathbuf), &client->dir_list, true);
-	}
+	return strdup(buf);
 }
 
 typedef void (*pkgconf_pkg_parser_keyword_func_t)(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, const char *keyword, const size_t lineno, const ptrdiff_t offset, char *value);
@@ -168,7 +107,18 @@ pkgconf_pkg_parser_dependency_func(const pkgconf_client_t *client, pkgconf_pkg_t
 	(void) lineno;
 
 	pkgconf_list_t *dest = (pkgconf_list_t *)((char *) pkg + offset);
-	pkgconf_dependency_parse(client, pkg, dest, value);
+	pkgconf_dependency_parse(client, pkg, dest, value, 0);
+}
+
+/* a variant of pkgconf_pkg_parser_dependency_func which colors the dependency node as an "internal" dependency. */
+static void
+pkgconf_pkg_parser_internal_dependency_func(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, const char *keyword, const size_t lineno, const ptrdiff_t offset, char *value)
+{
+	(void) keyword;
+	(void) lineno;
+
+	pkgconf_list_t *dest = (pkgconf_list_t *)((char *) pkg + offset);
+	pkgconf_dependency_parse(client, pkg, dest, value, PKGCONF_PKG_DEPF_INTERNAL);
 }
 
 /* keep this in alphabetical order */
@@ -182,22 +132,25 @@ static const pkgconf_pkg_parser_keyword_pair_t pkgconf_pkg_parser_keyword_funcs[
 	{"Name", pkgconf_pkg_parser_tuple_func, offsetof(pkgconf_pkg_t, realname)},
 	{"Provides", pkgconf_pkg_parser_dependency_func, offsetof(pkgconf_pkg_t, provides)},
 	{"Requires", pkgconf_pkg_parser_dependency_func, offsetof(pkgconf_pkg_t, required)},
+	{"Requires.internal", pkgconf_pkg_parser_internal_dependency_func, offsetof(pkgconf_pkg_t, requires_private)},
 	{"Requires.private", pkgconf_pkg_parser_dependency_func, offsetof(pkgconf_pkg_t, requires_private)},
 	{"Version", pkgconf_pkg_parser_tuple_func, offsetof(pkgconf_pkg_t, version)},
 };
 
-static bool
-pkgconf_pkg_parser_keyword_set(const pkgconf_client_t *client, pkgconf_pkg_t *pkg, const size_t lineno, const char *keyword, char *value)
+/*
+ * Fix the return type (issue #13 is reported).
+ */
+static void
+pkgconf_pkg_parser_keyword_set(pkgconf_pkg_t *pkg, const size_t lineno, const char *keyword, char *value)
 {
 	const pkgconf_pkg_parser_keyword_pair_t *pair = bsearch(keyword,
 		pkgconf_pkg_parser_keyword_funcs, PKGCONF_ARRAY_SIZE(pkgconf_pkg_parser_keyword_funcs),
 		sizeof(pkgconf_pkg_parser_keyword_pair_t), pkgconf_pkg_parser_keyword_pair_cmp);
 
 	if (pair == NULL || pair->func == NULL)
-		return false;
+		return;
 
-	pair->func(client, pkg, keyword, lineno, pair->offset, value);
-	return true;
+	pair->func(pkg->owner, pkg, keyword, lineno, pair->offset, value);
 }
 
 static const char *
@@ -237,6 +190,96 @@ determine_prefix(const pkgconf_pkg_t *pkg, char *buf, size_t buflen)
 	return buf;
 }
 
+static void
+remove_additional_separators(char *buf)
+{
+	char *p = buf;
+
+	while (*p) {
+		if (*p == '/') {
+			char *q;
+
+			q = ++p;
+			while (*q && *q == '/')
+				q++;
+
+			if (p != q)
+				memmove (p, q, strlen (q) + 1);
+		} else {
+			p++;
+		}
+	}
+}
+
+static void
+canonicalize_path(char *buf)
+{
+#ifdef _WIN32
+	char *p = buf;
+
+	while (*p) {
+		if (*p == '\\')
+			*p = '/';
+		p++;
+	}
+#endif
+
+	remove_additional_separators(buf);
+}
+
+static bool
+is_path_prefix_equal(const char *path1, const char *path2, size_t path2_len)
+{
+#ifdef _WIN32
+	return !_strnicmp(path1, path2, path2_len);
+#else
+	return !strncmp(path1, path2, path2_len);
+#endif
+}
+
+/*
+ * Fix the return type (issue #13 is reported).
+ */
+static void
+pkgconf_pkg_parser_value_set(pkgconf_pkg_t *pkg, const size_t lineno, const char *keyword, char *value)
+{
+	char canonicalized_value[PKGCONF_ITEM_SIZE];
+
+	(void) lineno;
+
+	pkgconf_strlcpy(canonicalized_value, value, sizeof canonicalized_value);
+	canonicalize_path(canonicalized_value);
+
+	/* Some pc files will use absolute paths for all of their directories
+	 * which is broken when redefining the prefix. We try to outsmart the
+	 * file and rewrite any directory that starts with the same prefix.
+	 */
+	if (pkg->owner->flags & PKGCONF_PKG_PKGF_REDEFINE_PREFIX && pkg->orig_prefix
+	    && is_path_prefix_equal(canonicalized_value, pkg->orig_prefix->value, strlen(pkg->orig_prefix->value)))
+	{
+		char newvalue[PKGCONF_ITEM_SIZE];
+
+		pkgconf_strlcpy(newvalue, pkg->prefix->value, sizeof newvalue);
+		pkgconf_strlcat(newvalue, canonicalized_value + strlen(pkg->orig_prefix->value), sizeof newvalue);
+		pkgconf_tuple_add(pkg->owner, &pkg->vars, keyword, newvalue, false);
+	}
+	else if (strcmp(keyword, pkg->owner->prefix_varname) || !(pkg->owner->flags & PKGCONF_PKG_PKGF_REDEFINE_PREFIX))
+		pkgconf_tuple_add(pkg->owner, &pkg->vars, keyword, value, true);
+	else
+	{
+		char pathbuf[PKGCONF_ITEM_SIZE];
+		const char *relvalue = determine_prefix(pkg, pathbuf, sizeof pathbuf);
+
+		if (relvalue != NULL)
+		{
+			pkg->orig_prefix = pkgconf_tuple_add(pkg->owner, &pkg->vars, "orig_prefix", canonicalized_value, true);
+			pkg->prefix = pkgconf_tuple_add(pkg->owner, &pkg->vars, keyword, relvalue, false);
+		}
+		else
+			pkgconf_tuple_add(pkg->owner, &pkg->vars, keyword, value, true);
+	}
+}
+
 typedef struct {
 	const char *field;
 	const ptrdiff_t offset;
@@ -248,6 +291,26 @@ static const pkgconf_pkg_validity_check_t pkgconf_pkg_validations[] = {
 	{"Version", offsetof(pkgconf_pkg_t, version)},
 };
 
+static const pkgconf_parser_operand_func_t pkg_parser_funcs[256] = {
+	[':'] = (pkgconf_parser_operand_func_t) pkgconf_pkg_parser_keyword_set,
+	['='] = (pkgconf_parser_operand_func_t) pkgconf_pkg_parser_value_set
+};
+
+static void pkg_warn_func(pkgconf_pkg_t *pkg, const char *fmt, ...) PRINTFLIKE(2, 3);
+
+static void
+pkg_warn_func(pkgconf_pkg_t *pkg, const char *fmt, ...)
+{
+	char buf[PKGCONF_ITEM_SIZE];
+	va_list va;
+
+	va_start(va, fmt);
+	vsnprintf(buf, sizeof buf, fmt, va);
+	va_end(va);
+
+	pkgconf_warn(pkg->owner, "%s", buf);
+}
+
 static bool
 pkgconf_pkg_validate(const pkgconf_client_t *client, const pkgconf_pkg_t *pkg)
 {
@@ -285,14 +348,13 @@ pkgconf_pkg_t *
 pkgconf_pkg_new_from_file(pkgconf_client_t *client, const char *filename, FILE *f)
 {
 	pkgconf_pkg_t *pkg;
-	char readbuf[PKGCONF_BUFSIZE];
-	char pathbuf[PKGCONF_ITEM_SIZE];
 	char *idptr;
-	size_t lineno = 0;
 
 	pkg = calloc(sizeof(pkgconf_pkg_t), 1);
+	pkg->owner = client;
 	pkg->filename = strdup(filename);
-	pkgconf_tuple_add(client, &pkg->vars, "pcfiledir", pkg_get_parent_dir(pkg, pathbuf, sizeof pathbuf), true);
+	pkg->pc_filedir = pkg_get_parent_dir(pkg);
+	pkgconf_tuple_add(client, &pkg->vars, "pcfiledir", pkg->pc_filedir, true);
 
 	/* make module id */
 	if ((idptr = strrchr(pkg->filename, PKG_DIR_SEP_S)) != NULL)
@@ -309,85 +371,7 @@ pkgconf_pkg_new_from_file(pkgconf_client_t *client, const char *filename, FILE *
 	if (idptr)
 		*idptr = '\0';
 
-	while (pkgconf_fgetline(readbuf, PKGCONF_BUFSIZE, f) != NULL)
-	{
-		char op, *p, *key, *value;
-		bool warned_key_whitespace = false, warned_value_whitespace = false;
-
-		lineno++;
-
-		PKGCONF_TRACE(client, "%s:" SIZE_FMT_SPECIFIER " > [%s]", filename, lineno, readbuf);
-
-		p = readbuf;
-		while (*p && (isalpha((unsigned int)*p) || isdigit((unsigned int)*p) || *p == '_' || *p == '.'))
-			p++;
-
-		key = readbuf;
-		if (!isalpha((unsigned int)*key) && !isdigit((unsigned int)*p))
-			continue;
-
-		while (*p && isspace((unsigned int)*p))
-		{
-			if (!warned_key_whitespace)
-			{
-				pkgconf_warn(client, "%s:" SIZE_FMT_SPECIFIER ": warning: whitespace encountered while parsing key section\n",
-					pkg->filename, lineno);
-				warned_key_whitespace = true;
-			}
-
-			/* set to null to avoid trailing spaces in key */
-			*p = '\0';
-			p++;
-		}
-
-		op = *p;
-		*p = '\0';
-		p++;
-
-		while (*p && isspace((unsigned int)*p))
-			p++;
-
-		value = p;
-		p = value + (strlen(value) - 1);
-		while (*p && isspace((unsigned int) *p) && p > value)
-		{
-			if (!warned_value_whitespace && op == '=')
-			{
-				pkgconf_warn(client, "%s:" SIZE_FMT_SPECIFIER ": warning: trailing whitespace encountered while parsing value section\n",
-					pkg->filename, lineno);
-				warned_value_whitespace = true;
-			}
-
-			*p = '\0';
-			p--;
-		}
-
-		switch (op)
-		{
-		case ':':
-			pkgconf_pkg_parser_keyword_set(client, pkg, lineno, key, value);
-			break;
-		case '=':
-			if (strcmp(key, client->prefix_varname) || !(client->flags & PKGCONF_PKG_PKGF_REDEFINE_PREFIX))
-				pkgconf_tuple_add(client, &pkg->vars, key, value, true);
-			else
-			{
-				const char *relvalue = determine_prefix(pkg, pathbuf, sizeof pathbuf);
-				if (relvalue != NULL)
-				{
-					pkgconf_tuple_add(client, &pkg->vars, "orig_prefix", value, true);
-					pkgconf_tuple_add(client, &pkg->vars, key, relvalue, false);
-				}
-				else
-					pkgconf_tuple_add(client, &pkg->vars, key, value, true);
-			}
-			break;
-		default:
-			break;
-		}
-	}
-
-	fclose(f);
+	pkgconf_parser_parse(f, pkg, pkg_parser_funcs, (pkgconf_parser_warn_func_t) pkg_warn_func, pkg->filename);
 
 	if (!pkgconf_pkg_validate(client, pkg))
 	{
@@ -396,7 +380,7 @@ pkgconf_pkg_new_from_file(pkgconf_client_t *client, const char *filename, FILE *
 		return NULL;
 	}
 
-	pkgconf_dependency_add(client, &pkg->provides, pkg->id, pkg->version, PKGCONF_CMP_EQUAL);
+	pkgconf_dependency_add(client, &pkg->provides, pkg->id, pkg->version, PKGCONF_CMP_EQUAL, 0);
 
 	return pkgconf_pkg_ref(client, pkg);
 }
@@ -480,7 +464,6 @@ pkgconf_pkg_ref(pkgconf_client_t *client, pkgconf_pkg_t *pkg)
 	if (pkg->owner != NULL && pkg->owner != client)
 		PKGCONF_TRACE(client, "WTF: client %p refers to package %p owned by other client %p", client, pkg, pkg->owner);
 
-	pkg->owner = client;
 	pkg->refcount++;
 	PKGCONF_TRACE(client, "refcount@%p: %d", pkg, pkg->refcount);
 
@@ -676,7 +659,6 @@ pkgconf_pkg_find_in_registry_key(pkgconf_client_t *client, HKEY hkey, const char
 pkgconf_pkg_t *
 pkgconf_pkg_find(pkgconf_client_t *client, const char *name)
 {
-	char pathbuf[PKGCONF_ITEM_SIZE];
 	pkgconf_pkg_t *pkg = NULL;
 	pkgconf_node_t *n;
 	FILE *f;
@@ -695,7 +677,7 @@ pkgconf_pkg_find(pkgconf_client_t *client, const char *name)
 			pkg = pkgconf_pkg_new_from_file(client, name, f);
 			if (pkg != NULL)
 			{
-				pkgconf_path_add(pkg_get_parent_dir(pkg, pathbuf, sizeof pathbuf), &client->dir_list, true);
+				pkgconf_path_add(pkg->pc_filedir, &client->dir_list, true);
 				return pkg;
 			}
 		}
@@ -1347,7 +1329,7 @@ pkgconf_pkg_verify_dependency(pkgconf_client_t *client, pkgconf_dependency_t *pk
 unsigned int
 pkgconf_pkg_verify_graph(pkgconf_client_t *client, pkgconf_pkg_t *root, int depth)
 {
-	return pkgconf_pkg_traverse(client, root, NULL, NULL, depth);
+	return pkgconf_pkg_traverse(client, root, NULL, NULL, depth, 0);
 }
 
 static unsigned int
@@ -1388,7 +1370,8 @@ pkgconf_pkg_walk_list(pkgconf_client_t *client,
 	pkgconf_list_t *deplist,
 	pkgconf_pkg_traverse_func_t func,
 	void *data,
-	int depth)
+	int depth,
+	unsigned int skip_flags)
 {
 	unsigned int eflags = PKGCONF_PKG_ERRF_OK;
 	pkgconf_node_t *node;
@@ -1419,10 +1402,16 @@ pkgconf_pkg_walk_list(pkgconf_client_t *client,
 			continue;
 		}
 
+		if (skip_flags && (depnode->flags & skip_flags) == skip_flags)
+		{
+			pkgconf_pkg_unref(client, pkgdep);
+			continue;
+		}
+
 		pkgconf_audit_log_dependency(client, pkgdep, depnode);
 
 		pkgdep->flags |= PKGCONF_PKG_PROPF_SEEN;
-		eflags |= pkgconf_pkg_traverse(client, pkgdep, func, data, depth - 1);
+		eflags |= pkgconf_pkg_traverse(client, pkgdep, func, data, depth - 1, skip_flags);
 		pkgdep->flags &= ~PKGCONF_PKG_PROPF_SEEN;
 		pkgconf_pkg_unref(client, pkgdep);
 	}
@@ -1480,7 +1469,7 @@ pkgconf_pkg_walk_conflicts_list(pkgconf_client_t *client,
 /*
  * !doc
  *
- * .. c:function:: unsigned int pkgconf_pkg_traverse(pkgconf_client_t *client, pkgconf_pkg_t *root, pkgconf_pkg_traverse_func_t func, void *data, int maxdepth)
+ * .. c:function:: unsigned int pkgconf_pkg_traverse(pkgconf_client_t *client, pkgconf_pkg_t *root, pkgconf_pkg_traverse_func_t func, void *data, int maxdepth, unsigned int skip_flags)
  *
  *    Walk and resolve the dependency graph up to `maxdepth` levels.
  *
@@ -1489,6 +1478,7 @@ pkgconf_pkg_walk_conflicts_list(pkgconf_client_t *client,
  *    :param pkgconf_pkg_traverse_func_t func: A traversal function to call for each resolved node in the dependency graph.
  *    :param void* data: An opaque pointer to data to be passed to the traversal function.
  *    :param int maxdepth: The maximum depth to walk the dependency graph for.  -1 means infinite recursion.
+ *    :param uint skip_flags: Skip over dependency nodes containing the specified flags.  A setting of 0 skips no dependency nodes.
  *    :return: ``PKGCONF_PKG_ERRF_OK`` on success, else an error code.
  *    :rtype: unsigned int
  */
@@ -1497,7 +1487,8 @@ pkgconf_pkg_traverse(pkgconf_client_t *client,
 	pkgconf_pkg_t *root,
 	pkgconf_pkg_traverse_func_t func,
 	void *data,
-	int maxdepth)
+	int maxdepth,
+	unsigned int skip_flags)
 {
 	unsigned int eflags = PKGCONF_PKG_ERRF_OK;
 
@@ -1520,7 +1511,7 @@ pkgconf_pkg_traverse(pkgconf_client_t *client,
 	}
 
 	PKGCONF_TRACE(client, "%s: walking requires list", root->id);
-	eflags = pkgconf_pkg_walk_list(client, root, &root->required, func, data, maxdepth);
+	eflags = pkgconf_pkg_walk_list(client, root, &root->required, func, data, maxdepth, skip_flags);
 	if (eflags != PKGCONF_PKG_ERRF_OK)
 		return eflags;
 
@@ -1530,7 +1521,7 @@ pkgconf_pkg_traverse(pkgconf_client_t *client,
 
 		/* XXX: ugly */
 		client->flags |= PKGCONF_PKG_PKGF_ITER_PKG_IS_PRIVATE;
-		eflags = pkgconf_pkg_walk_list(client, root, &root->requires_private, func, data, maxdepth);
+		eflags = pkgconf_pkg_walk_list(client, root, &root->requires_private, func, data, maxdepth, skip_flags);
 		client->flags &= ~PKGCONF_PKG_PKGF_ITER_PKG_IS_PRIVATE;
 
 		if (eflags != PKGCONF_PKG_ERRF_OK)
@@ -1584,14 +1575,15 @@ unsigned int
 pkgconf_pkg_cflags(pkgconf_client_t *client, pkgconf_pkg_t *root, pkgconf_list_t *list, int maxdepth)
 {
 	unsigned int eflag;
+	unsigned int skip_flags = (client->flags & PKGCONF_PKG_PKGF_DONT_FILTER_INTERNAL_CFLAGS) == 0 ? PKGCONF_PKG_DEPF_INTERNAL : 0;
 
-	eflag = pkgconf_pkg_traverse(client, root, pkgconf_pkg_cflags_collect, list, maxdepth);
+	eflag = pkgconf_pkg_traverse(client, root, pkgconf_pkg_cflags_collect, list, maxdepth, skip_flags);
 	if (eflag != PKGCONF_PKG_ERRF_OK)
 		pkgconf_fragment_free(list);
 
 	if (client->flags & PKGCONF_PKG_PKGF_MERGE_PRIVATE_FRAGMENTS)
 	{
-		eflag = pkgconf_pkg_traverse(client, root, pkgconf_pkg_cflags_private_collect, list, maxdepth);
+		eflag = pkgconf_pkg_traverse(client, root, pkgconf_pkg_cflags_private_collect, list, maxdepth, skip_flags);
 		if (eflag != PKGCONF_PKG_ERRF_OK)
 			pkgconf_fragment_free(list);
 	}
@@ -1640,7 +1632,7 @@ pkgconf_pkg_libs(pkgconf_client_t *client, pkgconf_pkg_t *root, pkgconf_list_t *
 {
 	unsigned int eflag;
 
-	eflag = pkgconf_pkg_traverse(client, root, pkgconf_pkg_libs_collect, list, maxdepth);
+	eflag = pkgconf_pkg_traverse(client, root, pkgconf_pkg_libs_collect, list, maxdepth, 0);
 
 	if (eflag != PKGCONF_PKG_ERRF_OK)
 	{
diff --git a/libpkgconf/queue.c b/libpkgconf/queue.c
index 1bfcb30..5220a5b 100644
--- a/libpkgconf/queue.c
+++ b/libpkgconf/queue.c
@@ -77,7 +77,7 @@ pkgconf_queue_compile(pkgconf_client_t *client, pkgconf_pkg_t *world, pkgconf_li
 		pkgconf_queue_t *pkgq;
 
 		pkgq = iter->data;
-		pkgconf_dependency_parse(client, world, &world->required, pkgq->package);
+		pkgconf_dependency_parse(client, world, &world->required, pkgq->package, 0);
 	}
 
 	return (world->required.head != NULL);
diff --git a/libpkgconf/stdinc.h b/libpkgconf/stdinc.h
index 3b90853..ca3a7dc 100644
--- a/libpkgconf/stdinc.h
+++ b/libpkgconf/stdinc.h
@@ -53,6 +53,9 @@
 #else
 # define PATH_DEV_NULL	"/dev/null"
 # define SIZE_FMT_SPECIFIER	"%zu"
+# ifdef __HAIKU__
+#  include <FindDirectory.h>
+# endif
 # include <dirent.h>
 # include <unistd.h>
 # include <limits.h>
diff --git a/libpkgconf/tuple.c b/libpkgconf/tuple.c
index a4b4250..6a610a1 100644
--- a/libpkgconf/tuple.c
+++ b/libpkgconf/tuple.c
@@ -136,6 +136,34 @@ pkgconf_tuple_find_delete(pkgconf_list_t *list, const char *key)
 	}
 }
 
+static char *
+dequote(const char *value)
+{
+	char *buf = calloc((strlen(value) + 1) * 2, 1);
+	char *bptr = buf;
+	const char *i;
+	char quote = 0;
+
+/*
+ * Fix the broken quote escaping (issue #12 is reported).
+ */
+  if (*value == '\'' || *value == '"')
+    quote = *value;
+
+	for (i = value; *i != '\0'; i++)
+	{
+		if (*i == '\\' && quote && *(i + 1) == quote)
+		{
+			i++;
+			*bptr++ = *i;
+		}
+		else if (*i != quote)
+			*bptr++ = *i;
+	}
+
+	return buf;
+}
+
 /*
  * !doc
  *
@@ -154,20 +182,25 @@ pkgconf_tuple_find_delete(pkgconf_list_t *list, const char *key)
 pkgconf_tuple_t *
 pkgconf_tuple_add(const pkgconf_client_t *client, pkgconf_list_t *list, const char *key, const char *value, bool parse)
 {
+	char *dequote_value;
 	pkgconf_tuple_t *tuple = calloc(sizeof(pkgconf_tuple_t), 1);
 
 	pkgconf_tuple_find_delete(list, key);
 
-	PKGCONF_TRACE(client, "adding tuple to @%p: %s => %s (parsed? %d)", list, key, value, parse);
+	dequote_value = dequote(value);
+
+	PKGCONF_TRACE(client, "adding tuple to @%p: %s => %s (parsed? %d)", list, key, dequote_value, parse);
 
 	tuple->key = strdup(key);
 	if (parse)
-		tuple->value = pkgconf_tuple_parse(client, list, value);
+		tuple->value = pkgconf_tuple_parse(client, list, dequote_value);
 	else
-		tuple->value = strdup(value);
+		tuple->value = strdup(dequote_value);
 
 	pkgconf_node_insert(&tuple->iter, tuple, list);
 
+	free(dequote_value);
+
 	return tuple;
 }