diff --git a/webkit2gtk3.changes b/webkit2gtk3.changes
index b00f25d..8a6aea3 100644
--- a/webkit2gtk3.changes
+++ b/webkit2gtk3.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Thu Oct  4 21:04:10 UTC 2018 - mgorse@suse.com
+
+- Integrate changes needed for SLE 12 / leap 42.3:
+  + depend on gcc7-c++, and pass appropriate executables to cmake.
+  + Disable web crypto API: libgcrypt is too old.
+  + Define USE_GSTREAMER_GL=FALSE: needs gstreamer 1.10.0 or newer.
+- disable libwoff2 for SLE 15/12 and Leap 15/42.3, since it is not
+  available there.
+
 -------------------------------------------------------------------
 Wed Sep 26 15:19:42 UTC 2018 - bjorn.lie@gmail.com
 
diff --git a/webkit2gtk3.spec b/webkit2gtk3.spec
index ab3afb9..d4a477e 100644
--- a/webkit2gtk3.spec
+++ b/webkit2gtk3.spec
@@ -12,7 +12,7 @@
 # license that conforms to the Open Source Definition (Version 1.9)
 # published by the Open Source Initiative.
 
-# Please submit bugfixes or comments via https://bugs.opensuse.org/
+# Please submit bugfixes or comments via http://bugs.opensuse.org/
 #
 
 
@@ -60,7 +60,11 @@ BuildRequires:  Mesa-libGLESv3-devel
 BuildRequires:  bison >= 2.3
 BuildRequires:  cmake
 BuildRequires:  enchant-devel
+%if 0%{?suse_version} == 1315
+BuildRequires:  gcc7-c++
+%else
 BuildRequires:  gcc-c++ >= 4.9
+%endif
 BuildRequires:  gobject-introspection-devel
 BuildRequires:  gperf >= 3.0.1
 BuildRequires:  hyphen-devel
@@ -97,7 +101,9 @@ BuildRequires:  pkgconfig(libpng)
 BuildRequires:  pkgconfig(libsecret-1)
 BuildRequires:  pkgconfig(libsoup-2.4) >= 2.61.90
 BuildRequires:  pkgconfig(libwebp)
+%if 0%{?suse_version} > 1500
 BuildRequires:  pkgconfig(libwoff2dec)
+%endif
 BuildRequires:  pkgconfig(libxml-2.0) >= 2.8.0
 BuildRequires:  pkgconfig(libxslt) >= 1.1.7
 BuildRequires:  pkgconfig(sqlite3)
@@ -305,6 +311,15 @@ export PYTHON=%{_bindir}/python3
   -DCMAKE_BUILD_TYPE=Release \
   -DLIBEXEC_INSTALL_DIR=%{_libexecdir}/libwebkit2gtk%{_wk2sover} \
   -DPORT=GTK \
+%if 0%{?suse_version} == 1315
+  -DCMAKE_C_COMPILER=gcc-7 \
+  -DCMAKE_CXX_COMPILER=g++-7 \
+  -DENABLE_WEB_CRYPTO=OFF \
+  -DUSE_GSTREAMER_GL=false \
+%endif
+%if 0%{?suse_version} <= 1500
+  -DUSE_WOFF2=false \
+%endif
   -DENABLE_MINIBROWSER=ON \
 %if %{with python3}
   -DPYTHON_EXECUTABLE=%{_bindir}/python3 \