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