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| author | Anthony Green <green@moxielogic.com> | 2022-09-01 08:05:01 -0400 |
|---|---|---|
| committer | Anthony Green <green@moxielogic.com> | 2022-09-01 08:05:01 -0400 |
| commit | bcb42e432b5372b1876e8c8db68837d92d1f94ae (patch) | |
| tree | e0a79af2a4aa31910ecd1e903fda4f69fc53c250 /configure.ac | |
| parent | 0eb91425f355be19939507d4d4d056bdad12c9dd (diff) | |
| download | libffi-bcb42e432b5372b1876e8c8db68837d92d1f94ae.tar.gz | |
Fix .cfi pseudo-ops test.
The existing tests were failing because the GCC was wrapping the test
asm in cfi directives, which gas doesn't like. So now we test if the
compiler emits them first, and assume that the assembler will accept
them. If that doesn't work, then we test if the assembler will accept
them assuming the compiler doesn't emit them.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index e427584..43fc03f 100644 --- a/configure.ac +++ b/configure.ac @@ -124,7 +124,22 @@ AC_SUBST(HAVE_LONG_DOUBLE_VARIANT) AC_C_BIGENDIAN -GCC_AS_CFI_PSEUDO_OP +AC_CACHE_CHECK([compiler generates .cfi pseudo-ops], + gcc_cv_as_cfi_pseudo_op, [ + gcc_cv_as_cfi_pseudo_op=no + echo 'void foo(void) { foo(); }' > conftest.c + if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then + if grep -q cfi_startproc conftest.s; then + gcc_cv_as_cfi_pseudo_op=yes + fi + fi + ]) +if test "x$gcc_cv_as_cfi_pseudo_op" = xyes; then + AC_DEFINE(HAVE_AS_CFI_PSEUDO_OP, 1, + [Define if your assembler supports .cfi_* directives.]) +else + GCC_AS_CFI_PSEUDO_OP +fi case "$TARGET" in SPARC) @@ -391,7 +406,7 @@ AC_ARG_ENABLE(purify-safety, AC_ARG_ENABLE(multi-os-directory, [ --disable-multi-os-directory disable use of gcc --print-multi-os-directory to change the library installation directory]) - + # These variables are only ever used when we cross-build to X86_WIN32. # And we only support this with GCC, so... if test "x$GCC" = "xyes"; then |