Commit 2143534a1cf2c3c66af2b62672bf743cf4872f3c
2021-06-28T02:00:24
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
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diff --git a/configure b/configure
index 432a7c8..1f71632 100755
--- a/configure
+++ b/configure
@@ -17826,14 +17826,27 @@ $as_echo "$have_gcc_sse3" >&6; }
fi
fi
- ac_fn_c_check_header_mongrel "$LINENO" "immintrin.h" "ac_cv_header_immintrin_h" "$ac_includes_default"
-if test "x$ac_cv_header_immintrin_h" = xyes; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for immintrin.h" >&5
+$as_echo_n "checking for immintrin.h... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <immintrin.h>
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
have_immintrin_h_hdr=yes
else
have_immintrin_h_hdr=no
fi
-
-
+rm -f core conftest.err conftest.$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
$as_echo "#define HAVE_IMMINTRIN_H 1" >>confdefs.h
@@ -26104,7 +26117,6 @@ if test x$WARN_ABOUT_ARM_SIMD_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}configure script with:\n"
SUMMARY="${SUMMARY}\n --disable-arm-simd\n"
fi
-
if test x$WARN_ABOUT_ARM_NEON_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}\nSDL is being built with ARM NEON optimizations, which\n"
SUMMARY="${SUMMARY}uses code licensed under the MIT license. If this is a\n"
diff --git a/configure.ac b/configure.ac
index 275dcbb..f54202a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -729,9 +729,10 @@ if test x$enable_assembly = xyes; then
fi
fi
- AC_CHECK_HEADER(immintrin.h,
- have_immintrin_h_hdr=yes,
- have_immintrin_h_hdr=no)
+ AC_MSG_CHECKING(for immintrin.h)
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <immintrin.h>]])],
+ [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
AC_DEFINE(HAVE_IMMINTRIN_H, 1, [ ])
fi
@@ -4520,7 +4521,6 @@ if test x$WARN_ABOUT_ARM_SIMD_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}configure script with:\n"
SUMMARY="${SUMMARY}\n --disable-arm-simd\n"
fi
-
if test x$WARN_ABOUT_ARM_NEON_ASM_MIT = xyes; then
SUMMARY="${SUMMARY}\nSDL is being built with ARM NEON optimizations, which\n"
SUMMARY="${SUMMARY}uses code licensed under the MIT license. If this is a\n"