root@kenny-desktop:/home/kenny/temp/zsnes-1.337/src# make
gcc -pipe -I. -Wall -D__LINUX__ -INONE -I/usr/include/SDL -D_GNU_SOURCE=1 -D_REENTRANT -D__OPENGL__ -Os -ffast-math -fomit-frame-pointer -fschedule-insns2 -s -march=pentiumpro -o zip/zzip.o -c zip/zzip.c
In file included from zip/unzip.h:49,
                 from zip/zzip.c:35:
zip/zlib.h:40:1: warning: "ZLIB_VERSION" redefined
In file included from zip/../gblhdr.h:107,
                 from zip/zzip.c:20:
/usr/include/zlib.h:40:1: warning: this is the location of the previous definition
In file included from zip/unzip.h:49,
                 from zip/zzip.c:35:
zip/zlib.h:68: error: redefinition of ‘struct z_stream_s’
In file included from zip/unzip.h:49,
                 from zip/zzip.c:35:
zip/zlib.h:157:1: warning: "Z_ASCII" redefined
In file included from zip/../gblhdr.h:107,
                 from zip/zzip.c:20:
/usr/include/zlib.h:198:1: warning: this is the location of the previous definition
zip/zlib.h:704: error: conflicting types for ‘gzwrite’
/usr/include/zlib.h:1114: error: previous declaration of ‘gzwrite’ was here
zip/zlib.h:882: error: redefinition of ‘struct internal_state’
make: *** [zip/zzip.o] Error 1