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configure.ac: manually check immintrin.h with AC_COMPILE_IFELSE(). 

AC_CHECK_HEADER() emits warnings when configuring for non-x86, because
the preprocessor check is OK but the compile check is not:

configure: WARNING: immintrin.h: present but cannot be compiled
configure: WARNING: immintrin.h:     check for missing prerequisite headers?
configure: WARNING: immintrin.h: see the Autoconf documentation
configure: WARNING: immintrin.h:     section "Present But Cannot Be Compiled"
configure: WARNING: immintrin.h: proceeding with the compiler's result
This commit is contained in:
Ozkan Sezer 2021-06-28 02:00:24 +03:00
parent ca383599b5
commit 2143534a1c
2 changed files with 21 additions and 9 deletions
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22
configure vendored
View File

@ -17826,14 +17826,27 @@ $as_echo "$have_gcc_sse3" >&6; }
fi fi
fi fi
ac_fn_c_check_header_mongrel "$LINENO" "immintrin.h" "ac_cv_header_immintrin_h" "$ac_includes_default" { $as_echo "$as_me:${as_lineno-$LINENO}: checking for immintrin.h" >&5
if test "x$ac_cv_header_immintrin_h" = xyes; then : $as_echo_n "checking for immintrin.h... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <immintrin.h>
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
have_immintrin_h_hdr=yes have_immintrin_h_hdr=yes
else else
have_immintrin_h_hdr=no have_immintrin_h_hdr=no
fi fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_immintrin_h_hdr" >&5
$as_echo "$have_immintrin_h_hdr" >&6; }
if test x$have_immintrin_h_hdr = xyes; then if test x$have_immintrin_h_hdr = xyes; then
$as_echo "#define HAVE_IMMINTRIN_H 1" >>confdefs.h $as_echo "#define HAVE_IMMINTRIN_H 1" >>confdefs.h
@ -26104,7 +26117,6 @@ if test x$WARN_ABOUT_ARM_SIMD_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}configure script with:\n" SUMMARY="${SUMMARY}configure script with:\n"
SUMMARY="${SUMMARY}\n --disable-arm-simd\n" SUMMARY="${SUMMARY}\n --disable-arm-simd\n"
fi fi
if test x$WARN_ABOUT_ARM_NEON_ASM_MIT = xyes; then if test x$WARN_ABOUT_ARM_NEON_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}\nSDL is being built with ARM NEON optimizations, which\n" SUMMARY="${SUMMARY}\nSDL is being built with ARM NEON optimizations, which\n"
SUMMARY="${SUMMARY}uses code licensed under the MIT license. If this is a\n" SUMMARY="${SUMMARY}uses code licensed under the MIT license. If this is a\n"

8
configure.ac
View File

@ -729,9 +729,10 @@ if test x$enable_assembly = xyes; then
fi fi
fi fi
AC_CHECK_HEADER(immintrin.h, AC_MSG_CHECKING(for immintrin.h)
have_immintrin_h_hdr=yes, AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]])],
have_immintrin_h_hdr=no) [have_immintrin_h_hdr=yes],[have_immintrin_h_hdr=no])
AC_MSG_RESULT($have_immintrin_h_hdr)
if test x$have_immintrin_h_hdr = xyes; then if test x$have_immintrin_h_hdr = xyes; then
AC_DEFINE(HAVE_IMMINTRIN_H, 1, [ ]) AC_DEFINE(HAVE_IMMINTRIN_H, 1, [ ])
fi fi
@ -4520,7 +4521,6 @@ if test x$WARN_ABOUT_ARM_SIMD_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}configure script with:\n" SUMMARY="${SUMMARY}configure script with:\n"
SUMMARY="${SUMMARY}\n --disable-arm-simd\n" SUMMARY="${SUMMARY}\n --disable-arm-simd\n"
fi fi
if test x$WARN_ABOUT_ARM_NEON_ASM_MIT = xyes; then if test x$WARN_ABOUT_ARM_NEON_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}\nSDL is being built with ARM NEON optimizations, which\n" SUMMARY="${SUMMARY}\nSDL is being built with ARM NEON optimizations, which\n"
SUMMARY="${SUMMARY}uses code licensed under the MIT license. If this is a\n" SUMMARY="${SUMMARY}uses code licensed under the MIT license. If this is a\n"