[PATCH] Fix detecting ld version with crosstool-NG (to fix symbol exporting)

[Olivier Blin <olivier dot blin at softathome dot com>]

ld from crosstool-NG reports a version string with an extra version:
GNU ld (crosstool-NG 1.13.0) 2.21.1

This made libtool assume that the ld version was the crosstool-NG
version (1.13.0) instead of the real ld version (2.21.1).

To fix the ld version string, this patch filters out any string
between parentheses that is followed by a space.

Because of this bug, filtering of exported symbols was not taking
place with crosstool-NG toolchains.

This issue has bee noticed when building pango, which exported
harfbuzz symbols that should have remained hidden.
---
 m4/libtool.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/m4/libtool.m4 b/m4/libtool.m4
index a8ecbc3..7b67f32 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -4690,7 +4690,7 @@ dnl Note also adjust exclude_expsyms for C++ above.
       _LT_TAGVAR(whole_archive_flag_spec, $1)=
     fi
     supports_anon_versioning=no
-    case `$LD -v 2>&1` in
+    case `$LD -v | $SED -e 's/([^)]\+)\s\+//' 2>&1` in
       *GNU\ gold*) supports_anon_versioning=yes ;;
       *\ [[01]].* | *\ 2.[[0-9]].* | *\ 2.10.*) ;; # catch versions < 2.11
       *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ...
-- 
1.7.11

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