From e1ce77b1673db76fb46d87effa7b1a1dc083d9b7 Mon Sep 17 00:00:00 2001
From: Sebastian Ramacher <sebastian@ramacher.at>
Date: Mon, 4 Feb 2013 14:44:29 +0100
Subject: Initial AES-NI support

---
 configure.ac | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 5541361..16078ac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,6 +49,18 @@ AX_CHECK_COMPILE_FLAG([-Wextra], [AX_APPEND_FLAG([-Wextra])])
 AX_CHECK_COMPILE_FLAG([-Wno-missing-field-initializers], [AX_APPEND_FLAG([-Wno-missing-field-initializers])])
 AX_CHECK_COMPILE_FLAG([-Wno-unused-parameter], [AX_APPEND_FLAG([-Wno-unused-parameter])])
 
+# Checks for compiler flags.
+old_CFLAGS="$CFLAGS"
+CFLAGS=-maes
+AC_MSG_CHECKING([whether CC supports -maes])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], [
+  AC_MSG_RESULT([yes])
+  AC_DEFINE(HAVE_MAES, [1], [Define if CC supports -maes])
+  have_maes=yes
+  ], [AC_MSG_RESULT([no])]
+)
+CFLAGS="$old_cflags"
+
 # Checks for libraries.
 AC_ARG_WITH([gmp], AS_HELP_STRING([--without-gmp], [Build without gmp library (default: test)]))
 AS_IF([test "x$with_gmp" != "xno"], [
@@ -76,7 +88,13 @@ AC_CHECK_DECLS([mpz_powm_sec], [], [], [
 ]])
 
 # Checks for header files.
-AC_CHECK_HEADERS([inttypes.h sys/inttypes.h limits.h stddef.h stdint.h stdlib.h string.h wchar.h])
+AC_CHECK_HEADERS([inttypes.h sys/inttypes.h cpuid.h limits.h stddef.h stdint.h stdlib.h string.h wchar.h])
+old_CPPFLAGS="$CPPFLAGS"
+AS_IF([test "x$have_maes" = "xyes"], [
+    CPPFLAGS="$CPPFLAGS -maes"
+])
+AC_CHECK_HEADERS([wmmintrin.h])
+CPPFLAGS="$old_CPPFLAGS"
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_INLINE
-- 
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