Merge pull request #153 from aj-bagwell/master

Don't discard externally set C_FLAGS

Author: aarond10

CMakeLists.txt

@@ -25,7 +25,7 @@ if (NOT CMAKE_INSTALL_BINDIR)
   set(CMAKE_INSTALL_BINDIR bin)
 endif()
 
-set(CMAKE_C_FLAGS "-Wall -Wextra --pedantic -Wno-strict-aliasing -Wno-variadic-macros")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra --pedantic -Wno-strict-aliasing -Wno-variadic-macros")
 set(CMAKE_C_FLAGS_DEBUG "-g -DDEBUG")
 set(CMAKE_C_FLAGS_RELEASE "-O2")