Autoconf: Add -maes -mpclmul if supported by compiler

This is for x86 AES-NI, intrinsics version.

Closes openwall#5593

src/configure

@@ -11790,6 +11790,60 @@ if test $simd != yes; then
   fi
 fi
 
+if test "x$simd" != xno; then
+  CFLAGS_EX=""
+    if test 1 -gt 0; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports -maes -mpclmul" >&5
+$as_echo_n "checking if $CC supports -maes -mpclmul... " >&6; }
+fi
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+  ac_saved_cflags="$CFLAGS"
+  CFLAGS="-Werror -maes -mpclmul"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  if test "1" -gt 0; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+fi
+      CFLAGS_EX="$CFLAGS_EX -maes -mpclmul"
+
+else
+  if test 1 -gt 0; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+    if test "1" = 2; then :
+  as_fn_error $? "Not supported by compiler" "$LINENO" 5
+fi
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  CFLAGS="$ac_saved_cflags"
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+  CPU_BEST_FLAGS="$CPU_BEST_FLAGS $CFLAGS_EX"
+fi
+
 CC="$CC_BACKUP"
 CFLAGS="$CFLAGS_BACKUP"
 

src/m4/jtr_x86_logic.m4

@@ -491,6 +491,13 @@ if test $simd != yes; then
   fi
 fi
 
+if test "x$simd" != xno; then
+  CFLAGS_EX=""
+  dnl Add -maes -mpclmul if supported
+  JTR_FLAG_CHECK([-maes -mpclmul], 1)
+  CPU_BEST_FLAGS="$CPU_BEST_FLAGS $CFLAGS_EX"
+fi
+
 CC="$CC_BACKUP"
 CFLAGS="$CFLAGS_BACKUP"