Fix installation path of pkgconfig file. If the package is compiled on a multiarch-enabled distribution (Debian and derivatives) the resulting md4c.pc file will have a m-a path in it. In this case it's better to install into LIBDIR.
diff --git a/md4c/CMakeLists.txt b/md4c/CMakeLists.txt
index 4e3e42d..fd90765 100644
--- a/md4c/CMakeLists.txt
+++ b/md4c/CMakeLists.txt
@@ -28,7 +28,7 @@ install(
# Create a pkg-config file
configure_file(md4c.pc.in md4c.pc @ONLY)
-install(FILES ${CMAKE_BINARY_DIR}/md4c/md4c.pc DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig)
+install(FILES ${CMAKE_BINARY_DIR}/md4c/md4c.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
# And a CMake file
install(EXPORT md4cConfig DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/md4c/)