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| author | Paul Eggert <eggert@cs.ucla.edu> | 2006-06-20 05:59:16 +0000 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2006-06-20 05:59:16 +0000 |
| commit | c88873d3a48127eb6252faf586a0026b091e3628 (patch) | |
| tree | b9cf2bbaeca2141369ea528583db07cc6eefa0b1 /m4 | |
| parent | d5a9087fb1d3b13243ad83d174fa1b1d0b0173c1 (diff) | |
| download | coreutils-c88873d3a48127eb6252faf586a0026b091e3628.tar.xz | |
(gl_IGNORE_UNUSED_LIBRARIES):
Use -Wl,--as-needed, not bare --as-needed, since HP-UX 11.11
cc merely issues a bunch of annoying warnings for --as-needed
(this problem was reported by Bob Proulx). Also, try linking with
-lm to detect a bug in binutils 2.16 (this problem was reported
by Ralf Wildenhues).
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/ChangeLog | 5 | ||||
| -rw-r--r-- | m4/lib-ignore.m4 | 14 |
2 files changed, 17 insertions, 2 deletions
diff --git a/m4/ChangeLog b/m4/ChangeLog index 8ad70a2ee..f31ec45f7 100644 --- a/m4/ChangeLog +++ b/m4/ChangeLog @@ -3,6 +3,11 @@ * lib-ignore.m4 (gl_IGNORE_UNUSED_LIBRARIES): Prefer binutils's --as-needed option if available. Problem reported by Albert Chin in <http://lists.gnu.org/archive/html/bug-gnulib/2006-06/msg00114.html>. + However, use -Wl,--as-needed, not bare --as-needed, since HP-UX 11.11 + cc merely issues a bunch of annoying warnings for --as-needed + (this problem was reported by Bob Proulx). Also, try linking with + -lm to detect a bug in binutils 2.16 (this problem was reported + by Ralf Wildenhues). 2006-06-18 Jim Meyering <jim@meyering.net> diff --git a/m4/lib-ignore.m4 b/m4/lib-ignore.m4 index deaaee8e6..e518f8113 100644 --- a/m4/lib-ignore.m4 +++ b/m4/lib-ignore.m4 @@ -13,12 +13,21 @@ AC_DEFUN([gl_IGNORE_UNUSED_LIBRARIES], [gl_cv_ignore_unused_libraries], [gl_cv_ignore_unused_libraries=none gl_saved_ldflags=$LDFLAGS + gl_saved_libs=$LIBS + # Link with -lm to detect binutils 2.16 bug with --as-needed; see + # <http://lists.gnu.org/archive/html/bug-gnulib/2006-06/msg00131.html>. + LIBS="$LIBS -lm" # Use long option sequences like '-z ignore' to test for the feature, # to forestall problems with linkers that have -z, -i, -g, -n, etc. flags. + # GCC + binutils likes '-Wl,--as-needed'. + # GCC + Solaris ld likes '-Wl,-z,ignore'. + # Sun C likes '-z ignore'. + # Don't try bare '--as-needed'; nothing likes it and the HP-UX 11.11 + # native cc issues annoying warnings and then ignores it, + # which would cause us to incorrectly conclude that it worked. for gl_flags in \ '-Wl,--as-needed' \ '-Wl,-z,ignore' \ - '--as-needed' \ '-z ignore' do LDFLAGS="$gl_flags $LDFLAGS" @@ -26,7 +35,8 @@ AC_DEFUN([gl_IGNORE_UNUSED_LIBRARIES], [gl_cv_ignore_unused_libraries=$gl_flags]) LDFLAGS=$gl_saved_ldflags test "$gl_cv_ignore_unused_libraries" != none && break - done]) + done + LIBS=$gl_saved_libs]) test "$gl_cv_ignore_unused_libraries" != none && LDFLAGS="$LDFLAGS $gl_cv_ignore_unused_libraries" |