Accepting request 400535 from KDE:Extra

Fixes ppc64le nuild with gcc6 (forwarded request 400460 from dimstar)

OBS-URL: https://build.opensuse.org/request/show/400535
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/opencv?expand=0&rev=63

opencv.spec

@@ -35,6 +35,8 @@ Source1:        opencv_contrib_face-3.1.0.tar.bz2
 Patch6:         opencv-gcc5.patch
 # PATCH-FIX-OPENSUSE opencv-build-compare.patch -- avoid republish if some random external version number changes
 Patch8:         opencv-build-compare.patch
+# PATCH-FIX-OPENSUSE opencv-gcc6-disable-pch.patch -- Disable PCH for GCC6. 
+Patch9:         opencv-gcc6-disable-pch.patch
 BuildRequires:  cmake
 BuildRequires:  fdupes
 BuildRequires:  unzip
@@ -146,6 +148,7 @@ This package contains the documentation and examples for the OpenCV library.
 %setup -q -a 1
 %patch6 -p1
 %patch8 -p1
+%patch9 -p1
 
 # Remove Windows specific files
 rm -f doc/packaging.txt
@@ -153,8 +156,13 @@ rm -f doc/packaging.txt
 # sed -i 's/\r$//' samples/c/facedetect.cmd
 
 %build
+%ifarch ppc64le
+if [ $(gcc -dumpversion) -ge 6 ]; then
+export mlra=-mlra
+fi
+%endif
 export CFLAGS="%{optflags} $(getconf LFS_CFLAGS)"
-export CXXFLAGS="%{optflags} $(getconf LFS_CFLAGS)"
+export CXXFLAGS="%{optflags} ${mlra} $(getconf LFS_CFLAGS)"
 mkdir build
 cd build
 cmake -DCMAKE_BUILD_TYPE=Release \