libvorbis: Contain gcc specific compiler flags using configure option

(From OE-Core rev: b6cdbf50e5c26c406e4ddecd66202ff7324f5468)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/libvorbis/libvorbis/0001-configure-Check-for-clang.patch b/meta/recipes-multimedia/libvorbis/libvorbis/0001-configure-Check-for-clang.patch
new file mode 100644
index 0000000000..7dad0cd8a5
--- /dev/null
+++ b/meta/recipes-multimedia/libvorbis/libvorbis/0001-configure-Check-for-clang.patch
@@ -0,0 +1,56 @@
+From 44b4511784f9b51c514dff4ceb3cbeaf9c374d08 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 eddd02d..00ecba5 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -93,6 +93,16 @@ 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 --------------------------------------------------
+@@ -127,10 +137,15 @@ 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 -ffast-math -mno-ieee-fp -D_REENTRANT -fsigned-char"
++               CFLAGS="-O3 -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
+-- 
+1.8.3.1
+