Ozkan Sezer 2143534a1c 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

2021-06-28 02:00:24 +03:00

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