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authorBoris Kolpackov <boris@codesynthesis.com>2021-05-13 15:38:53 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2021-05-13 15:38:53 +0200
commit23827edd998db30dd1f0d6a14f09399aa7d07b69 (patch)
treead5d7669b167efde8e01894c72d091196f58bcdf /libbuild2/cc/link-rule.cxx
parentd92ea3a7cff0dae578005a914df799e1e11efc8e (diff)
Add ${c,cxx}.find_system_{header,library}() functions
Diffstat (limited to 'libbuild2/cc/link-rule.cxx')
-rw-r--r--libbuild2/cc/link-rule.cxx131
1 files changed, 131 insertions, 0 deletions
diff --git a/libbuild2/cc/link-rule.cxx b/libbuild2/cc/link-rule.cxx
index 96e243d..05a4da8 100644
--- a/libbuild2/cc/link-rule.cxx
+++ b/libbuild2/cc/link-rule.cxx
@@ -34,6 +34,137 @@ namespace build2
using namespace bin;
using build2::to_string;
+ optional<path> link_rule::
+ find_system_library (const strings& l) const
+ {
+ assert (!l.empty ());
+
+ // Figure out what we are looking for.
+ //
+ // See similar code in process_libraries().
+ //
+ // @@ TODO: should we take the link order into account (but do we do
+ // this when we link system libraries)?
+ //
+ string n1, n2;
+ {
+ auto i (l.begin ()), e (l.end ());
+
+ string s (*i);
+
+ if (tsys == "win32-msvc")
+ {
+ if (s[0] == '/')
+ {
+ // Some option (e.g., /WHOLEARCHIVE:<name>). Fall through to fail.
+ }
+ else
+ {
+ // Presumably a complete name.
+ //
+ n1 = move (s);
+ i++;
+ }
+ }
+ else
+ {
+ if (s[0] == '-')
+ {
+ // -l<name>, -l <name>
+ //
+ if (s[1] == 'l')
+ {
+ if (s.size () == 2) // -l <name>
+ {
+ if (i + 1 != e)
+ s = *++i;
+ else
+ s.clear ();
+ }
+ else // -l<name>
+ s.erase (0, 2);
+
+ if (!s.empty ())
+ {
+ i++;
+
+ // Here we need to be consistent with search_library(). Maybe
+ // one day we should generalize it to be usable here (though
+ // here we don't need library name guessing).
+ //
+ const char* p ("");
+ const char* e1 (nullptr);
+ const char* e2 (nullptr);
+
+ if (tclass == "windows")
+ {
+ if (tsys == "mingw32")
+ {
+ p = "lib";
+ e1 = ".dll.a";
+ e2 = ".a";
+ }
+ else
+ {
+ e1 = ".dll.lib";
+ e2 = ".lib";
+ }
+ }
+ else
+ {
+ p = "lib";
+ e1 = (tclass == "macos" ? ".dylib" : ".so");
+ e2 = ".a";
+ }
+
+ n1 = p + s + e1;
+ n2 = e2 != nullptr ? p + s + e2 : string ();
+ }
+ }
+#if 0
+ // -framework <name> (Mac OS)
+ //
+ else if (tsys == "darwin" && l == "-framework")
+ {
+ // @@ TODO: maybe one day.
+ }
+#endif
+ else
+ {
+ // Some other option (e.g., -Wl,--whole-archive). Fall through
+ // to fail.
+ }
+ }
+ else
+ {
+ // Presumably a complete name.
+ //
+ n1 = move (s);
+ i++;
+ }
+ }
+
+ if (i != e)
+ fail << "unexpected library name '" << *i << "'";
+ }
+
+ path p; // Reuse the buffer.
+ for (const dir_path& d: sys_lib_dirs)
+ {
+ auto exists = [&p, &d] (const string& n)
+ {
+ return file_exists ((p = d, p /= n),
+ true /* follow_symlinks */,
+ true /* ignore_errors */);
+ };
+
+ if (exists (n1) || (!n2.empty () && exists (n2)))
+ return p;
+ }
+
+ return nullopt;
+ }
+
link_rule::
link_rule (data&& d)
: common (move (d)),