--- a/MozillaFirefox/MozillaFirefox.spec	Thu Apr 27 09:17:24 2017 +0200
+++ b/MozillaFirefox/MozillaFirefox.spec	Sun Jun 04 09:49:48 2017 +0200
@@ -92,7 +92,7 @@
 BuildRequires:  pkgconfig(gtk+-unix-print-3.0)
 %if 0%{?firefox_use_rust}
 BuildRequires:  cargo
-BuildRequires:  rust >= 1.13
+BuildRequires:  rust >= 1.10
 BuildRequires:  rust-std
 %endif
 # libavcodec is required for H.264 support but the
@@ -289,9 +289,9 @@
 export CC=gcc-5
 %endif
 export CFLAGS="%{optflags} -fno-strict-aliasing"
-# boo#986541: add -fno-delete-null-pointer-checks and -fno-inline-small-functions for gcc6
+# boo#986541: add -fno-delete-null-pointer-checks for gcc6
 %if 0%{?suse_version} > 1320
-export CFLAGS="$CFLAGS -fno-delete-null-pointer-checks -fno-inline-small-functions"
+export CFLAGS="$CFLAGS -fno-delete-null-pointer-checks"
 %endif
 %ifarch %arm
 export CFLAGS="${CFLAGS/-g / }"
@@ -328,6 +328,10 @@
 %if 0%{?build_hardened}
 ac_add_options --enable-pie
 %endif
+# gcc7 (boo#104105)
+%if 0%{?suse_version} > 1320
+ac_add_options --enable-optimize="-g -O2"
+%endif
 %ifarch %ix86 %arm
 %if 0%{?suse_version} > 1230
 ac_add_options --disable-optimize