diff --git a/.gitignore b/.gitignore
index cdd3c0c..5eb2ff1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,2 @@
-/gc-7.4.2.tar.gz
-/gc-7.4.4.tar.gz
 /gc-7.6.0.tar.gz
 /gc-7.6.2.tar.gz
diff --git a/gc.spec b/gc.spec
index b934b63..6e089c8 100644
--- a/gc.spec
+++ b/gc.spec
@@ -1,4 +1,6 @@
 
+%global compat 1
+
 Summary: A garbage collector for C and C++
 Name:    gc
 Version: 7.6.2
@@ -7,6 +9,9 @@ Release: 4%{?dist}
 License: BSD
 Url:     http://www.hboehm.info/gc/
 Source0: http://www.hboehm.info/gc/gc_source/gc-%{version}%{?pre}.tar.gz
+%if 0%{?compat}
+Source1: http://www.hboehm.info/gc/gc_source/gc-7.6.0.tar.gz
+%endif
 
 ## upstreamable patches
 
@@ -33,6 +38,11 @@ Provides:  libgc-devel = %{version}-%{release}
 %description devel
 %{summary}.
 
+%package -n compat-gc
+Summary: Compat gc-7.6.0 runtime library
+%description -n compat-gc
+%{summary} to ease transition to gc-7.6.2+.
+
 
 %prep
 %autosetup -n gc-%{version}%{?pre}
@@ -41,6 +51,14 @@ Provides:  libgc-devel = %{version}-%{release}
 rm -f libtool libtool.m4
 autoreconf -i -f
 
+%if 0%{?compat}
+tar xzf %{SOURCE1}
+pushd gc-7.6.0
+rm -f libtool libtool.m4
+autoreconf -i -f
+popd
+%endif
+
 
 %build
 
@@ -57,11 +75,35 @@ CPPFLAGS="-DUSE_GET_STACKBASE_FOR_MAIN"; export CPPFLAGS
 %endif
   --enable-threads=posix
 
-make %{?_smp_mflags}
+%{make_build}
+
+%if 0%{?compat}
+pushd gc-7.6.0
+%configure \
+  --disable-static \
+  --enable-cplusplus \
+  --enable-large-config \
+%ifarch %{ix86}
+  --enable-parallel-mark \
+%endif
+  --enable-threads=posix
+
+%{make_build}
+popd
+%endif
 
 
 %install
-make install DESTDIR=%{buildroot}
+
+%if 0%{?compat}
+%{make_install} -C gc-7.6.0
+
+rm -rfv %{buildroot}{%{_includedir},%{_datadir}}
+rm -fv %{buildroot}%{_libdir}/lib{cord,gcccpp}*
+rm -fv %{buildroot}%{_libdir}/libgc.so
+%endif
+
+%{make_install}
 
 install -p -D -m644 doc/gc.man  %{buildroot}%{_mandir}/man3/gc.3
 
@@ -81,6 +123,7 @@ rm -fv  %{buildroot}%{_libdir}/lib*.la
 make check %{?arch_ignore}
 %endif
 
+
 %ldconfig_scriptlets
 
 %files
@@ -100,10 +143,18 @@ make check %{?arch_ignore}
 %{_libdir}/pkgconfig/bdw-gc.pc
 %{_mandir}/man3/gc.3*
 
+%if 0%{?compat}
+%ldconfig_scriptlets -n compat-gc
+
+%files -n compat-gc
+%{_libdir}/libgc.so.1*
+%endif
+
 
 %changelog
 * Tue Feb 20 2018 Rex Dieter <rdieter@fedoraproject.org> - 7.6.2-4
 - BR: gcc-c++
+- add (temporary) compat-gc
 
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 7.6.2-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
diff --git a/sources b/sources
index 5f29fdc..cb036ae 100644
--- a/sources
+++ b/sources
@@ -1 +1,2 @@
 SHA512 (gc-7.6.2.tar.gz) = 7b54812903929b0d5d1d696beac54629a7667997b41ef45299373bc18b2153d5755286b25e11cc90ffc572239e52a02900927bc60b0ad3593162b8c8e259fd50
+SHA512 (gc-7.6.0.tar.gz) = 511e8c01287b1ee9dbec87f0573377de77038b7af053a3f33afed9b3ffa30e2402d6a9bb0ca4f4b81cd808209b47b5718d498cff3de6632a057fe03fad51fc43