Fix libomp libdir

build.spec.inc

@@ -51,8 +51,6 @@ popd
 # TODO(kkleine): Follow more closely the Distribution guidelines found here: https://llvm.org/docs/BuildingADistribution.html
 # force off shared libs as cmake macros turns it on.
 # TODO: Disable LLVM_UNREACHABLE_OPTIMIZE.
-# TODO: Override LIBOMP_INSTALL_LIBDIR, because otherwise the libraries
-# are installed to /usr/lib64/$TRIPLE and clang can't find them.
 %cmake	-G Ninja \
 	-DLLVM_ENABLE_PROJECTS="%{projects}" \
 	\
@@ -101,15 +99,8 @@ popd
 	\
 	\
 	-DLIBOMP_INSTALL_ALIASES=OFF \
-%if %{without compat_build}
-%if 0%{?__isa_bits} == 64
-	-DOPENMP_LIBDIR_SUFFIX=64 \
-%else
-	-DOPENMP_LIBDIR_SUFFIX= \
-%endif
-%endif
-	-DOPENMP_INSTALL_LIBDIR=%{_lib} \
-	-DOFFLOAD_INSTALL_LIBDIR=%{_lib} \
+	-DOPENMP_INSTALL_LIBDIR=%{unprefixed_libdir} \
+	-DOFFLOAD_INSTALL_LIBDIR=%{unprefixed_libdir} \
 	\
 	\
 	\

globals.spec.inc

@@ -56,6 +56,7 @@
 %global install_datadir %{install_prefix}/share
 %global install_libexecdir %{install_prefix}/libexec
 %global install_docdir %{install_datadir}/doc
+%global unprefixed_libdir lib
 %global build_libdir llvm/%{_vpath_builddir}/lib
 
 %global pkg_includedir %{_includedir}/%{pkg_name_llvm}
@@ -69,6 +70,7 @@
 %global install_includedir %{_includedir}
 %global install_libexecdir %{_libexecdir}
 %global install_docdir %{_docdir}
+%global unprefixed_libdir %{_lib}
 %global build_libdir llvm/%{_vpath_builddir}/%{_lib}
 %global pkg_datadir %{_datadir}
 %global pkg_suffix %{nil}