disable mtune for s390x, armv7hl and ppc64le

gmic.spec

@@ -44,6 +44,8 @@ BuildRequires: gcc-c++
 Obsoletes:     gmic-static <= 2.1.8
 
 Patch1:        gmic_opencv.patch
+Patch2:        Makefile_arch.patch
+
 
 %description
 G'MIC is an open and full-featured framework for image processing, providing
@@ -79,6 +81,10 @@ Provides a plugin for using G'MIC from GIMP
 %setup -q -a 1 -a 2 -a 3
 %patch1 -p1 -b.opencv
 
+%ifarch %{arm} s390x ppc64le
+%patch2 -p1 -b.arch
+%endif
+
 %build
 export CCACHE_DISABLE=1
 cd src