diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d89aaf0cdf..bf600914a5 100644 --- a/configure.ac +++ b/configure.ac @@ -1577,8 +1577,10 @@ foo: EOF if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then libc_cv_asm_weak_directive=yes + libc_cv_asm_weak=.weak else libc_cv_asm_weak_directive=no + libc_cv_asm_weak= fi rm -f conftest*]) @@ -1597,6 +1599,7 @@ baz: EOF if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then libc_cv_asm_weakext_directive=yes + libc_cv_asm_weak=.weakext else libc_cv_asm_weakext_directive=no fi @@ -1610,6 +1613,53 @@ elif test $libc_cv_asm_weakext_directive = yes; then AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE) fi +AC_CACHE_CHECK(for .secondary assembler directive, + libc_cv_asm_secondary_directive, [dnl +cat > conftest.s <<EOF +${libc_cv_dot_text} +_sym: +.secondary _sym +EOF +test -n "$libc_cv_asm_weak" && cat >> conftest.s <<EOF +$libc_cv_asm_weak _sym +EOF +if ${CC-cc} -c $ASFLAGS -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then + if $READELF -s conftest.o | fgrep _sym | fgrep SECOND > /dev/null; then + libc_cv_asm_secondary_directive=yes + else + libc_cv_asm_secondary_directive=no + fi +else + libc_cv_asm_secondary_directive=no +fi +rm -f conftest*]) +if test $libc_cv_asm_secondary_directive = yes; then + AC_DEFINE(HAVE_ASM_SECONDARY_DIRECTIVE) + AC_CACHE_CHECK(for secondary symbol in shared library, + libc_cv_ld_secondary, [dnl +cat > conftest.c <<EOF +asm (".secondary foo"); +void foo (void) { } +EOF + if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS + -fPIC -shared -o conftest.so conftest.c + -nostartfiles -nostdlib + 1>&AS_MESSAGE_LOG_FD]) + then + if $READELF -s conftest.so | fgrep foo | fgrep SECOND > /dev/null; then + libc_cv_ld_secondary=yes + else + libc_cv_ld_secondary=no + fi + else + libc_cv_ld_secondary=no + fi + rm -f conftest*]) +else + libc_cv_ld_secondary=no +fi +AC_SUBST(libc_cv_ld_secondary) + AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl cat > conftest.c <<\EOF _start () {} |