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[gold commit] PR gold/16203: Fix build failure on Gentoo/FreeBSD
- From: Cary Coutant <ccoutant at google dot com>
- To: Binutils <binutils at sourceware dot org>
- Date: Fri, 22 Nov 2013 15:50:56 -0800
- Subject: [gold commit] PR gold/16203: Fix build failure on Gentoo/FreeBSD
- Authentication-results: sourceware.org; auth=none
PR gold/16203 complains that gold assumes that -ldl is needed when
plugins are enabled, but dlopen is provided by default on FreeBSD.
I've committed the following patch to check what library is needed for
dlopen.
-cary
2013-11-22 Cary Coutant <ccoutant@google.com>
gold/
PR gold/16203
* configure.ac: Add check for which library is needed for
dlopen.
* configure: Regenerate.
diff --git a/gold/configure.ac b/gold/configure.ac
index 82ad11e..9bc216b 100644
--- a/gold/configure.ac
+++ b/gold/configure.ac
@@ -528,9 +528,14 @@ AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
AC_CHECK_HEADERS(byteswap.h)
dnl When plugins enabled dynamic loader interface is required. Check headers
-dnl which may provide this interface. In case of dlfcn.h add libdl to link.
+dnl which may provide this interface. Add the necessary library to link.
AC_CHECK_HEADERS(windows.h)
-AC_CHECK_HEADERS(dlfcn.h, [DLOPEN_LIBS="-ldl"], [DLOPEN_LIBS=""])
+AC_CHECK_HEADERS(dlfcn.h)
+AC_SEARCH_LIBS(dlopen, [dl dld])
+case "$ac_cv_search_dlopen" in
+ no*) DLOPEN_LIBS="";;
+ *) DLOPEN_LIBS="$ac_cv_search_dlopen";;
+esac
AC_SUBST(DLOPEN_LIBS)
AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times)