Mercurial > hg > octave-kai > gnulib-hg
changeset 6562:c89ddea009ce
* lib-ignore.m4 (gl_IGNORE_UNUSED_LIBRARIES): Don't use ldd, as
it's not portable and it doesn't work with cross-compiles. Fix missing-$
typo in 'test "gl_cv_ignore_unused_libraries" ...' that prevented -zignore
from being used with Sun's C compiler.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Tue, 17 Jan 2006 07:23:20 +0000 |
| parents | c9da4589b6c5 |
| children | cdaaa4da0697 |
| files | m4/ChangeLog m4/lib-ignore.m4 |
| diffstat | 2 files changed, 23 insertions(+), 24 deletions(-) [+] |
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--- a/m4/ChangeLog +++ b/m4/ChangeLog @@ -1,3 +1,11 @@ +2006-01-16 Paul Eggert <eggert@cs.ucla.edu> + + * lib-ignore.m4 (gl_IGNORE_UNUSED_LIBRARIES): Don't use ldd, as + it's not portable and it doesn't work with cross-compiles. + Problem reported by Bruno Haible. Fix missing-$ typo in + 'test "gl_cv_ignore_unused_libraries" ...' that prevented + -zignore from being used with Sun's C compiler. + 2006-01-12 Bruno Haible <bruno@clisp.org> * ldd.m4: New file.
--- a/m4/lib-ignore.m4 +++ b/m4/lib-ignore.m4 @@ -12,31 +12,22 @@ AC_CACHE_CHECK([for flag to ignore unused libraries], [gl_cv_ignore_unused_libraries], [gl_cv_ignore_unused_libraries=none - AC_LINK_IFELSE([AC_LANG_PROGRAM()], - [gl_ldd_output0=`(ldd conftest$ac_exeext) 2>/dev/null` || - gl_ldd_output0=]) - if test "$gl_ldd_output0"; then - gl_saved_ldflags=$LDFLAGS - gl_saved_libs=$LIBS - LIBS="$LIBS -lm" + gl_saved_ldflags=$LDFLAGS + # 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. + for gl_flags in '-Xlinker -z -Xlinker ignore' '-z ignore'; do + LDFLAGS="$gl_flags $LDFLAGS" AC_LINK_IFELSE([AC_LANG_PROGRAM()], - [gl_ldd_output1=`(ldd conftest$ac_exeext) 2>/dev/null` || - gl_ldd_output1=]) - if test "$gl_ldd_output1" && test "$gl_ldd_output0" != "$gl_ldd_output1" - then - for gl_flags in '-Xlinker -zignore' '-zignore'; do - LDFLAGS="$gl_flags $LDFLAGS" - AC_LINK_IFELSE([AC_LANG_PROGRAM()], - [if gl_ldd_output2=`(ldd conftest$ac_exeext) 2>/dev/null` && - test "$gl_ldd_output0" = "$gl_ldd_output2"; then - gl_cv_ignore_unused_libraries=$gl_flags - fi]) - LDFLAGS=$gl_saved_ldflags - test "gl_cv_ignore_unused_libraries" != none && break - done - fi - LIBS=$gl_saved_LIBS - fi]) + [case $gl_flags in + '-Xlinker -z -Xlinker ignore') + # Shorten this ugly thing, for prettier 'make' output. + gl_cv_ignore_unused_libraries='-Xlinker -zignore';; + *) + gl_cv_ignore_unused_libraries=$gl_flags;; + esac]) + LDFLAGS=$gl_saved_ldflags + test "$gl_cv_ignore_unused_libraries" != none && break + done]) test "$gl_cv_ignore_unused_libraries" != none && LDFLAGS="$LDFLAGS $gl_cv_ignore_unused_libraries"