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authorBoris Kolpackov <boris@codesynthesis.com>2022-05-05 10:54:48 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2022-05-05 10:54:48 +0200
commit9525ffdb54cd1dbe55a2d8d2ed3d351d8793a8e3 (patch)
treecf3cb9e725e3d0d25025aaaab33e3b605023162c /libbuild2/cc/link-rule.cxx
parentaa44a864777e9896956ff6dae8fd66ddbaae6db8 (diff)
Allow linking libraries without any sources/headers with hint
This can be useful for creating "metadata libraries".
Diffstat (limited to 'libbuild2/cc/link-rule.cxx')
-rw-r--r--libbuild2/cc/link-rule.cxx11
1 files changed, 8 insertions, 3 deletions
diff --git a/libbuild2/cc/link-rule.cxx b/libbuild2/cc/link-rule.cxx
index c186751..f8414c9 100644
--- a/libbuild2/cc/link-rule.cxx
+++ b/libbuild2/cc/link-rule.cxx
@@ -483,10 +483,15 @@ namespace build2
return false;
}
- if (!(r.seen_x || r.seen_c || r.seen_obj || r.seen_lib))
+ // Sometimes we may need to have a binless library whose only purpose is
+ // to export dependencies on other libraries (potentially in a platform-
+ // specific manner; think the whole -pthread mess). So allow a library
+ // without any sources with a hint.
+ //
+ if (!(r.seen_x || r.seen_c || r.seen_obj || r.seen_lib || !hint.empty ()))
{
- l4 ([&]{trace << "no " << x_lang << ", C, or obj/lib prerequisite "
- << "for target " << t;});
+ l4 ([&]{trace << "no " << x_lang << ", C, obj/lib prerequisite or "
+ << "hint for target " << t;});
return false;
}