Fix C linking when doing static builds

cmake/StaticBuild.cmake

@@ -121,7 +121,7 @@ endif()
 if(BUILD_STATIC_GCC)
   # This ensures that we don't depend on libstdc++ or libgcc_s
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -nodefaultlibs")
-  set(STATIC_BASE_LIBRARIES "-Wl,-Bstatic -lstdc++ -Wl,-Bdynamic")
+  set(STATIC_BASE_LIBRARIES "")
   if(ENABLE_ASAN AND NOT WIN32 AND NOT APPLE)
     set(STATIC_BASE_LIBRARIES "${STATIC_BASE_LIBRARIES} -Wl,-Bstatic -lasan -Wl,-Bdynamic -ldl -lm -lpthread")
   endif()
@@ -141,5 +141,6 @@ if(BUILD_STATIC_GCC)
   else()
     set(STATIC_BASE_LIBRARIES "${STATIC_BASE_LIBRARIES} -lgcc -lgcc_eh -lc")
   endif()
-  set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} ${STATIC_BASE_LIBRARIES}")
+  set(CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE} ${STATIC_BASE_LIBRARIES}")
+  set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic ${STATIC_BASE_LIBRARIES}")
 endif()