enable ARM Neon optimizations (tested on Oracle Cloud)

Author: divinity76

configure.ac

@@ -342,6 +342,10 @@ PHP_C_BIGENDIAN
 dnl Check if we're targeting x86 / x86_64
 PHP_CHECK_X86_TARGET
 
+dnl Check if we're targeting ARM Neon CPUs
+PHP_CHECK_ARM_NEON_SUPPORT
+
+
 dnl Check if we're targeting Windows
 PHP_CHECK_WINDOWS_TARGET
 

ext/hash/config.m4

@@ -10,12 +10,12 @@ fi
 
 EXT_HASH_BLAKE3_SOURCES="hash_blake3.c blake3/upstream_blake3/c/blake3.c blake3/upstream_blake3/c/blake3_dispatch.c blake3/upstream_blake3/c/blake3_portable.c"
 
-dnl if test $ac_cv_target_arm_neon = yes; then
-dnl   EXT_HASH_BLAKE3_SOURCES="$EXT_HASH_BLAKE3_SOURCES blake3/upstream_blake3/c/blake3_neon.c"
-dnl   EXT_HASH_BLAKE3_HEADERS="$EXT_HASH_BLAKE3_HEADERS ext/hash/blake3/upstream_blake3/c/blake3_impl.h"
-dnl fi
-PHP_HASH_CFLAGS="$PHP_HASH_CFLAGS -DBLAKE3_USE_NEON=0"
-
+if test $ac_cv_target_arm_neon = yes; then
+   EXT_HASH_BLAKE3_SOURCES="$EXT_HASH_BLAKE3_SOURCES blake3/upstream_blake3/c/blake3_neon.c"
+   EXT_HASH_BLAKE3_HEADERS="$EXT_HASH_BLAKE3_HEADERS ext/hash/blake3/upstream_blake3/c/blake3_impl.h"
+else
+   PHP_HASH_CFLAGS="$PHP_HASH_CFLAGS -DBLAKE3_USE_NEON=0"
+fi
 
 if test $ac_cv_c_bigendian_php = yes; then
   EXT_HASH_SHA3_SOURCES="hash_sha3.c"