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From d619ccf6c11ab574466914c57994a82fb99401af Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 22 Mar 2017 16:06:55 +0000
Subject: [PATCH] configure: Check for clang
Disable gcc specific options if using clang
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
Upstream-Status: Pending
configure.ac | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/configure.ac b/configure.ac
index 28b0a14..2d4e984 100644
--- a/configure.ac
+++ b/configure.ac
@@ -98,6 +98,16 @@ AC_ARG_ENABLE(examples,
AM_CONDITIONAL(BUILD_EXAMPLES, [test "x$enable_examples" = xyes])
+AC_MSG_CHECKING([whether C compiler is clang])
+$CC -x c /dev/null -dM -E > conftest.txt 2>&1
+if grep "__clang__" conftest.txt >/dev/null 2>&1; then
+ AC_SUBST([CC_CLANG], [1])
+ AC_MSG_RESULT([yes])
+ else
+ AC_SUBST([CC_CLANG], [0])
+ AC_MSG_RESULT([no])
+fi
+
dnl --------------------------------------------------
dnl Set build flags based on environment
dnl --------------------------------------------------
@@ -132,10 +142,15 @@ else
AC_MSG_RESULT([$GCC_VERSION])
case $host in
*86-*-linux*)
+ if test "$CC_CLANG" = "1"; then
+ ieeefp=""
+ else
+ ieefp="-mno-ieee-fp"
+ fi
DEBUG="-g -Wall -Wextra -D_REENTRANT -D__NO_MATH_INLINES -fsigned-char"
- CFLAGS="-O3 -Wall -Wextra -ffast-math -mno-ieee-fp -D_REENTRANT -fsigned-char"
+ CFLAGS="-O3 -Wall -Wextra -ffast-math -D_REENTRANT -fsigned-char ${ieefp}"
# PROFILE="-Wall -Wextra -pg -g -O3 -ffast-math -D_REENTRANT -fsigned-char -fno-inline -static"
- PROFILE="-Wall -Wextra -pg -g -O3 -ffast-math -mno-ieee-fp -D_REENTRANT -fsigned-char -fno-inline"
+ PROFILE="-Wall -Wextra -pg -g -O3 -ffast-math ${ieefp} -D_REENTRANT -fsigned-char -fno-inline"
# glibc < 2.1.3 has a serious FP bug in the math inline header
# that will cripple Vorbis. Look to see if the magic FP stack
--
2.17.0
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