diff options
| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2023-03-01 11:22:49 +0200 |
|---|---|---|
| committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2023-03-01 11:22:49 +0200 |
| commit | 66bae697a853b21e0a2ff2a5031d23e3691a9084 (patch) | |
| tree | e23526caba5056848225014f60ae9423ecae1044 | |
| parent | 898c857206ada06d70c5f46ac5adaa9d7058e672 (diff) | |
| download | libgcrypt-66bae697a853b21e0a2ff2a5031d23e3691a9084.tar.gz | |
Improve PPC target function attribute checks
* configure.ac (gcry_cv_gcc_attribute_ppc_target)
(gcry_cv_clang_attribute_ppc_target): Add 'always_inline'
function to test.
--
With some CFLAG combinations, target attribute fails to work with
always_inline functions. Patch adds detection for such configuration
and disables target attribute use in such case (and suffer less
optimal code generation).
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
| -rw-r--r-- | configure.ac | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/configure.ac b/configure.ac index 0d5c9160..44340e49 100644 --- a/configure.ac +++ b/configure.ac @@ -2376,10 +2376,11 @@ AC_CACHE_CHECK([whether compiler supports GCC PowerPC target attributes], else gcry_cv_gcc_attribute_ppc_target=no AC_LINK_IFELSE([AC_LANG_PROGRAM( - [[void __attribute__((target("cpu=power8"))) testfn8(void) {} + [[void __attribute__((always_inline)) inline aifn(void) {} + void __attribute__((target("cpu=power8"))) testfn8(void) {aifn();} void __attribute__((target("cpu=power9"))) testfn9(void) - { testfn8(); } - ]], [ testfn9(); ])], + { testfn8(); aifn(); } + ]], [ testfn9(); aifn(); ])], [gcry_cv_gcc_attribute_ppc_target=yes]) fi]) if test "$gcry_cv_gcc_attribute_ppc_target" = "yes" ; then @@ -2398,10 +2399,11 @@ AC_CACHE_CHECK([whether compiler supports clang PowerPC target attributes], else gcry_cv_clang_attribute_ppc_target=no AC_LINK_IFELSE([AC_LANG_PROGRAM( - [[void __attribute__((target("arch=pwr8"))) testfn8(void) {} + [[void __attribute__((always_inline)) inline aifn(void) {} + void __attribute__((target("arch=pwr8"))) testfn8(void) {aifn();} void __attribute__((target("arch=pwr9"))) testfn9(void) - { testfn8(); } - ]], [ testfn9(); ])], + { testfn8(); aifn(); } + ]], [ testfn9(); aifn(); ])], [gcry_cv_clang_attribute_ppc_target=yes]) fi]) if test "$gcry_cv_clang_attribute_ppc_target" = "yes" ; then |