diff --git a/gmic.spec b/gmic.spec
index 35d1b73..432c1ed 100644
--- a/gmic.spec
+++ b/gmic.spec
@@ -76,16 +76,7 @@ BuildRequires:  libtiff-devel
 %endif
 %endif
 %endif
-%if 0%{?suse_version} == 1030
-BuildRequires:  gimp-unstable-devel
-%else
 BuildRequires:  gimp-devel
-%endif
-%if 0%{?sles_version} == 11
-BuildRequires:  glib2-branding-SLES
-%endif
-
-%define openSUSE_submit 1
 
 %description
 G'MIC is an open and full-featured framework for image processing, providing several different user interfaces to convert/manipulate/filter/visualize generic image datasets, from 1d scalar signals to 3d+t sequences of multi-spectral volumetric images. Technically speaking, what it does is:
@@ -207,37 +198,10 @@ mv zart/README zart/README.zart
 cp -p %{SOURCE1} .
 
 %build
-RPM_OPT_FLAGS="`echo $RPM_OPT_FLAGS | sed 's/-fstack-protector//'`"
-#RPM_OPT_FLAGS="$RPM_OPT_FLAGS -O3 -ffast-math -ftree-vectorize"
-RPM_OPT_FLAGS="$RPM_OPT_FLAGS -ffast-math"
 GCCVER=`gcc -v 2>&1 | tail -n1 | sed -e 's/^gcc version \([^ ]*\) .*$/\1/' -e 's/\.//g'`
-if test $GCCVER -ge 480; then RPM_OPT_FLAGS="$RPM_OPT_FLAGS -fno-ipa-sra"; fi
 if test $GCCVER -ge 480 -a $GCCVER -le 482; then MAKEFLAGS="NO_OPENMP=1"; fi
 if test $GCCVER -le 445; then sed -i 's/\-std=c++11//' src/Makefile; fi
 if test $GCCVER -le 440; then MAKEFLAGS="NO_OPENMP=1"; fi
-# Compile times are exorbitant as are, -funroll-loops makes it worse
-#RPM_OPT_FLAGS="$RPM_OPT_FLAGS -funroll-loops"
-%ifarch %{ix86} x86_64
-RPM_OPT_FLAGS="$RPM_OPT_FLAGS -momit-leaf-frame-pointer"
-%endif
-%if 0%{?openSUSE_submit} == 0
-%ifarch %{ix86}
-RPM_OPT_FLAGS="$RPM_OPT_FLAGS -mmmx -msse -mfpmath=sse,387"
-%endif
-%endif
-%if 0%{?fedora_version} > 19
-RPM_OPT_FLAGS="`echo $RPM_OPT_FLAGS | sed 's/-strong//'`"
-%endif
-# gcc-4.3 needs -fno-tree-pre, see gcc bug 36439
-GCCVER="`gcc --version | head -n1 | sed 's/^gcc[^0-9]*\([^ ]*\).*$/\1/'`"
-#echo $GCCVER
-case $GCCVER in 4.3*)
-        RPM_OPT_FLAGS="$RPM_OPT_FLAGS -fno-tree-pre"
-        ;;
-        4.5*)
-        RPM_OPT_FLAGS="`echo $RPM_OPT_FLAGS | sed 's/\-funroll\-loops //'`"
-        ;;
-esac
 # Limit parallel build to avoid overloading machines
 free -m
 MEM=`free -m | grep '^Mem:' | sed 's/^Mem: *\([0-9]*\).*$/\1/'`
@@ -253,7 +217,6 @@ if test -n "%jobs" -a $MAXJOBS -gt 1; then
 else
         JOBS=""
 fi
-#make CFLAGS="$RPM_OPT_FLAGS"
 cd src
 %if 0%{?fedora_version} > 16
 make $JOBS $MAKEFLAGS CFLAGS="$RPM_OPT_FLAGS" LIB=%{_lib} QMAKE=qmake-qt4 cli