diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/configure.in b/configure.in index fd7e49bc0e..9f2c984b26 100644 --- a/configure.in +++ b/configure.in @@ -605,13 +605,45 @@ if test $elf != yes; then fi fi +dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) +AC_DEFUN(AC_CHECK_ASM_UNDERSCORE, +[cat > conftest.$ac_ext <<EOF +dnl This sometimes fails to find confdefs.h, for some reason. +dnl [#]line __oline__ "[$]0" +[#]line __oline__ "configure" +#include "confdefs.h" +void underscore_test(void) { +return; } +EOF +if AC_TRY_EVAL(ac_compile); then + if grep _underscore_test conftest* >/dev/null; then + ifelse([$1], , :, [rm -f conftest* + $1]) + else + ifelse([$2], , , [rm -f conftest* + $2]) + fi +else + echo "configure: failed program was:" >&AC_FD_CC + cat conftest.$ac_ext >&AC_FD_CC + ifelse([$2], , , [rm -f conftest* + $2]) +fi +rm -f conftest*]) + if test $elf = yes; then libc_cv_asm_underscores=no else - AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores, - [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();], - libc_cv_asm_underscores=yes, - libc_cv_asm_underscores=no)]) + if test $ac_cv_prog_cc_works = yes; then + AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores, + [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();], + libc_cv_asm_underscores=yes, + libc_cv_asm_underscores=no)]) + else + AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores, + [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes, + libc_cv_asm_underscores=no)]) + fi fi if test $libc_cv_asm_underscores = no; then AC_DEFINE(NO_UNDERSCORES) |