How can I ignore GCC compiler 'pedantic' errors in external library headers?

I recently added -pedantic and -pedantic-errors to my make GCC compile options to help clean up my cross-platform code. All was fine until it found errors in external-included header files. Is there a way to turn off this error checking in external header files, i.e.:

Keep checking for files included like this:

#include "myheader.h"

Stop checking for include files like this:

#include <externalheader.h>

Here are the errors I am getting:

g++ -Wall -Wextra -Wno-long-long -Wno-unused-parameter -pedantic --pedantic-errors-O3 -D_FILE_OFFSET_BITS=64 -DMINGW -I"freetype/include" -I"jpeg" -I"lpng128" -I"zlib"-I"mysql/include" -I"ffmpeg/libswscale" -I"ffmpeg/libavformat" -I"ffmpeg/libavcodec"-I"ffmpeg/libavutil" -o omingwd/kguimovie.o -c kguimovie.cppIn file included from ffmpeg/libavutil/avutil.h:41,             from ffmpeg/libavcodec/avcodec.h:30,             from kguimovie.cpp:44:ffmpeg/libavutil/mathematics.h:32: error: comma at end of enumerator listIn file included from ffmpeg/libavcodec/avcodec.h:30,             from kguimovie.cpp:44:ffmpeg/libavutil/avutil.h:110: error: comma at end of enumerator listIn file included from kguimovie.cpp:44:ffmpeg/libavcodec/avcodec.h:277: error: comma at end of enumerator listffmpeg/libavcodec/avcodec.h:303: error: comma at end of enumerator listffmpeg/libavcodec/avcodec.h:334: error: comma at end of enumerator listffmpeg/libavcodec/avcodec.h:345: error: comma at end of enumerator listffmpeg/libavcodec/avcodec.h:2249: warning: `ImgReSampleContext' is deprecated(declared at ffmpeg/libavcodec/avcodec.h:2243)ffmpeg/libavcodec/avcodec.h:2259: warning: `ImgReSampleContext' is deprecated(declared at ffmpeg/libavcodec/avcodec.h:2243)In file included from kguimovie.cpp:45:ffmpeg/libavformat/avformat.h:262: error: comma at end of enumerator listIn file included from ffmpeg/libavformat/rtsp.h:26,             from ffmpeg/libavformat/avformat.h:465,             from kguimovie.cpp:45:ffmpeg/libavformat/rtspcodes.h:38: error: comma at end of enumerator listIn file included from ffmpeg/libavformat/avformat.h:465,             from kguimovie.cpp:45:ffmpeg/libavformat/rtsp.h:32: error: comma at end of enumerator listffmpeg/libavformat/rtsp.h:69: error: comma at end of enumerator list