libpkgconf: pkg: fix long-standing bug where -uninstalled pkg-config files would have the wrong identifier

libpkgconf/pkg.c

@@ -457,6 +457,13 @@ pkgconf_pkg_new_from_file(pkgconf_client_t *client, const char *filename, FILE *
 	if (idptr)
 		*idptr = '\0';
 
+	if (pkg->flags & PKGCONF_PKG_PROPF_UNINSTALLED)
+	{
+		idptr = strrchr(pkg->id, '-');
+		if (idptr)
+			*idptr = '\0';
+	}
+
 	pkgconf_parser_parse(f, pkg, pkg_parser_funcs, (pkgconf_parser_warn_func_t) pkg_warn_func, pkg->filename);
 
 	if (!pkgconf_pkg_validate(client, pkg))

tests/regress.sh

@@ -23,6 +23,7 @@ tests_init \
 	idirafter_munge_order \
 	idirafter_munge_sysroot \
 	idirafter_ordering \
+	modversion_uninstalled \
 	pcpath \
 	virtual_variable \
 	fragment_collision \
@@ -273,3 +274,9 @@ billion_laughs_body()
 	atf_check -o inline:"warning: truncating very long variable to 64KB\nwarning: truncating very long variable to 64KB\nwarning: truncating very long variable to 64KB\nwarning: truncating very long variable to 64KB\nwarning: truncating very long variable to 64KB\n" \
 		pkgconf --with-path="${selfdir}/lib1" --validate billion-laughs
 }
+
+modversion_uninstalled_body()
+{
+	atf_check -o inline:"1.2.3\n" \
+		pkgconf --with-path="${selfdir}/lib1" --modversion omg
+}