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-rw-r--r--libbuild2/cc/pkgconfig.cxx59
1 files changed, 46 insertions, 13 deletions
diff --git a/libbuild2/cc/pkgconfig.cxx b/libbuild2/cc/pkgconfig.cxx
index 617834e..29d9155 100644
--- a/libbuild2/cc/pkgconfig.cxx
+++ b/libbuild2/cc/pkgconfig.cxx
@@ -134,10 +134,10 @@ namespace build2
strings
libs (bool stat) const;
- string
+ optional<string>
variable (const char*) const;
- string
+ optional<string>
variable (const string& s) const {return variable (s.c_str ());}
private:
@@ -437,14 +437,14 @@ namespace build2
return to_strings (f, 'L', client_->filter_libdirs);
}
- string pkgconf::
+ optional<string> pkgconf::
variable (const char* name) const
{
assert (client_ != nullptr); // Must not be empty.
mlock l (pkgconf_mutex);
const char* r (pkgconf_tuple_find (client_, &pkg_->vars, name));
- return r != nullptr ? string (r) : string ();
+ return r != nullptr ? optional<string> (r) : nullopt;
}
#endif
@@ -1170,10 +1170,13 @@ namespace build2
&next, &s, &lt] (const pkgconf& pc,
prerequisites& ps)
{
- string val (pc.variable ("cxx_modules"));
+ optional<string> val (pc.variable ("cxx_modules"));
+
+ if (!val)
+ return;
string m;
- for (size_t b (0), e (0); !(m = next (val, b, e)).empty (); )
+ for (size_t b (0), e (0); !(m = next (*val, b, e)).empty (); )
{
// The format is <name>=<path> with `..` used as a partition
// separator (see pkgconfig_save() for details).
@@ -1182,7 +1185,7 @@ namespace build2
if (p == string::npos ||
p == 0 || // Empty name.
p == m.size () - 1) // Empty path.
- fail << "invalid module information in '" << val << "'" <<
+ fail << "invalid module information in '" << *val << "'" <<
info << "while parsing pkg-config --variable=cxx_modules "
<< pc.path;
@@ -1192,8 +1195,8 @@ namespace build2
// Extract module properties, if any.
//
- string pp (pc.variable ("cxx_module_preprocessed." + mn));
- string se (pc.variable ("cxx_module_symexport." + mn));
+ optional<string> pp (pc.variable ("cxx_module_preprocessed." + mn));
+ optional<string> se (pc.variable ("cxx_module_symexport." + mn));
// Replace the partition separator.
//
@@ -1238,11 +1241,12 @@ namespace build2
//
{
value& v (mt.vars.assign (x_preprocessed)); // NULL
- if (!pp.empty ()) v = move (pp);
+ if (pp)
+ v = move (*pp);
}
{
- mt.vars.assign (x_symexport) = (se == "true");
+ mt.vars.assign (x_symexport) = (se && *se == "true");
}
tl.second.unlock ();
@@ -1270,10 +1274,13 @@ namespace build2
prerequisites& ps)
{
string var (string (lang) + "_importable_headers");
- string val (pc.variable (var));
+ optional<string> val (pc.variable (var));
+
+ if (!val)
+ return;
string h;
- for (size_t b (0), e (0); !(h = next (val, b, e)).empty (); )
+ for (size_t b (0), e (0); !(h = next (*val, b, e)).empty (); )
{
path hp (move (h));
path hf (hp.leaf ());
@@ -1374,6 +1381,20 @@ namespace build2
if (ps)
parse_cflags (*st, spc, false);
+ // Load the bin.whole flag (whole archive).
+ //
+ if (at != nullptr)
+ {
+ // Note that if unspecified we leave it unset letting the consumer
+ // override it, if necessary (see the bin.lib lookup semantics for
+ // details).
+ //
+ if (optional<string> v = (pa ? apc : spc).variable ("bin.whole"))
+ {
+ at->vars.assign ("bin.whole") = (*v == "true");
+ }
+ }
+
// For now we assume static and shared variants export the same set of
// modules/importable headers. While technically possible, having
// different sets will most likely lead to all sorts of complications
@@ -1800,6 +1821,18 @@ namespace build2
for (const string& a: args)
os << ' ' << a;
os << endl;
+
+ // Save the bin.whole (whole archive) flag (see the link rule for
+ // details on the lookup semantics).
+ //
+ if (cast_false<bool> (
+ l.lookup_original (ctx.var_pool["bin.whole"],
+ true /* target_only */).first))
+ {
+ os << endl
+ << "bin.whole = true"
+ << endl;
+ }
}
}