fix getopt problem

Makefile

@@ -1,11 +1,11 @@
 CXXFLAGS := $(shell pkg-config --cflags zlib libpng)
 LDFLAGS := $(shell pkg-config --libs zlib libpng)
 
-flif: maniac/*.h maniac/*.cpp image/*.h image/*.cpp transform/*.h transform/*.cpp flif.cpp flif.h flif_config.h getopt/*.c
-	g++ -std=gnu++11 $(CXXFLAGS) $(LDFLAGS) -DNDEBUG -O3 -g0 -Wall maniac/util.cpp maniac/chance.cpp image/crc32k.cpp image/image.cpp image/image-png.cpp image/image-pnm.cpp image/image-pam.cpp image/color_range.cpp transform/factory.cpp flif.cpp getopt/getopt.c getopt/getopt_long.c -lpng -o flif
+flif: maniac/*.h maniac/*.cpp image/*.h image/*.cpp transform/*.h transform/*.cpp flif.cpp flif.h flif_config.h
+	g++ -std=gnu++11 $(CXXFLAGS) $(LDFLAGS) -DNDEBUG -O3 -g0 -Wall maniac/util.cpp maniac/chance.cpp image/crc32k.cpp image/image.cpp image/image-png.cpp image/image-pnm.cpp image/image-pam.cpp image/color_range.cpp transform/factory.cpp flif.cpp -lpng -o flif
 
-flif.prof: maniac/*.h maniac/*.cpp image/*.h image/*.cpp transform/*.h transform/*.cpp flif.cpp flif.h flif_config.h getopt/*.c
-	g++ -std=gnu++11 $(CXXFLAGS) $(LDFLAGS) -DNDEBUG -O3 -g0 -pg -Wall maniac/util.cpp maniac/chance.cpp image/crc32k.cpp image/image.cpp image/image-png.cpp image/image-pnm.cpp image/image-pam.cpp image/color_range.cpp transform/factory.cpp flif.cpp getopt/getopt.c getopt/getopt_long.c -lpng -o flif.prof
+flif.prof: maniac/*.h maniac/*.cpp image/*.h image/*.cpp transform/*.h transform/*.cpp flif.cpp flif.h flif_config.h
+	g++ -std=gnu++11 $(CXXFLAGS) $(LDFLAGS) -DNDEBUG -O3 -g0 -pg -Wall maniac/util.cpp maniac/chance.cpp image/crc32k.cpp image/image.cpp image/image-png.cpp image/image-pnm.cpp image/image-pam.cpp image/color_range.cpp transform/factory.cpp flif.cpp -lpng -o flif.prof
 
-flif.dbg: maniac/*.h maniac/*.cpp image/*.h image/*.cpp transform/*.h transform/*.cpp flif.cpp flif.h flif_config.h getopt/*.c
-	g++ -std=gnu++11 $(CXXFLAGS) $(LDFLAGS) -O0 -ggdb3 -Wall maniac/util.cpp maniac/chance.cpp image/crc32k.cpp image/image.cpp image/image-png.cpp image/image-pnm.cpp image/image-pam.cpp image/color_range.cpp transform/factory.cpp flif.cpp getopt/getopt.c getopt/getopt_long.c -lpng -o flif.dbg
+flif.dbg: maniac/*.h maniac/*.cpp image/*.h image/*.cpp transform/*.h transform/*.cpp flif.cpp flif.h flif_config.h
+	g++ -std=gnu++11 $(CXXFLAGS) $(LDFLAGS) -O0 -ggdb3 -Wall maniac/util.cpp maniac/chance.cpp image/crc32k.cpp image/image.cpp image/image-png.cpp image/image-pnm.cpp image/image-pam.cpp image/color_range.cpp transform/factory.cpp flif.cpp -lpng -o flif.dbg

flif.cpp

@@ -35,7 +35,12 @@
 
 #include "flif_config.h"
 
+#ifdef _MSC_VER
 #include "getopt/getopt.h"
+#else
+#include "getopt.h"
+#endif
+
 #include <stdarg.h>