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| author | Alan Modra <amodra@gmail.com> | 2009-03-04 02:10:34 +0000 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2009-03-04 02:10:34 +0000 |
| commit | 51dec22749b3733b1fa3df0c1290a50967887ccf (patch) | |
| tree | facb4cb39146093e91e42897ba36a8a4e40b55d6 /bfd/configure.in | |
| parent | a1f7ca36bff182786ef15618af3f749719fc518f (diff) | |
| download | gdb-51dec22749b3733b1fa3df0c1290a50967887ccf.zip gdb-51dec22749b3733b1fa3df0c1290a50967887ccf.tar.gz gdb-51dec22749b3733b1fa3df0c1290a50967887ccf.tar.bz2 | |
bfd/
PR 6768
* configure.in: Test for ld --as-needed support. Link shared
libbfd against libm.
* configure: Regenerate.
opcodes/
PR 6768
* configure.in: Test for ld --as-needed support. Link shared
libopcodes against libm.
* configure: Regenerate.
Diffstat (limited to 'bfd/configure.in')
| -rw-r--r-- | bfd/configure.in | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/bfd/configure.in b/bfd/configure.in index a56004d..fe780a9 100644 --- a/bfd/configure.in +++ b/bfd/configure.in @@ -494,6 +494,16 @@ if test -n "$TRAD_HEADER"; then [Name of host specific header file to include in trad-core.c.]) fi +# Check if linker supports --as-needed and --no-as-needed options +AC_CACHE_CHECK(linker --as-needed support, bfd_cv_ld_as_needed, + [bfd_cv_ld_as_needed=no + if $LD --help 2>/dev/null | grep as-needed > /dev/null; then + bfd_cv_ld_as_needed=yes + fi + ]) + +LT_LIB_M + # When building a shared libbfd, link against the pic version of libiberty # so that apps that use libbfd won't need libiberty just to satisfy any # libbfd references. @@ -516,6 +526,18 @@ changequote([,])dnl SHARED_LIBADD="-L`pwd`/../libiberty -liberty -L`pwd`/../intl -lintl -lcygwin -lkernel32" ;; esac + + if test -n "$SHARED_LIBADD"; then + if test -n "$LIBM"; then + if test x"$bfd_cv_ld_as_needed" = xyes; then + # Link against libm only when needed. Put -lc, -lm inside -Wl + # to stop libtool reordering these options. + SHARED_LIBADD="$SHARED_LIBADD -Wl,-lc,--as-needed,`echo $LIBM | sed 's/ /,/g'`,--no-as-needed" + else + SHARED_LIBADD="$SHARED_LIBADD $LIBM" + fi + fi + fi fi AC_SUBST(SHARED_LDFLAGS) AC_SUBST(SHARED_LIBADD) |