set PACKAGE_VERSION so it gets substituted in cglm.pc.in by cmake
otherwise it ends up being an empty string and the installed pc has a
bogus line:
Version:
@@ -152,6 +152,7 @@ set(prefix ${CMAKE_INSTALL_PREFIX})
set(exec_prefix ${CMAKE_INSTALL_PREFIX})
set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
set(libdir "\${prefix}/${CMAKE_INSTALL_LIBDIR}")
+set(PACKAGE_VERSION "${PROJECT_VERSION}")
configure_file(${CMAKE_CURRENT_LIST_DIR}/cglm.pc.in ${CMAKE_BINARY_DIR}/cglm.pc @ONLY)
install(FILES ${CMAKE_BINARY_DIR}/cglm.pc
