#ifdef Z_SOLO
   typedef unsigned long z_size_t;
#else
#  define z_longlong long long
#  if defined(NO_SIZE_T)
     typedef unsigned NO_SIZE_T z_size_t;
#  elif defined(STDC)
#    include <stddef.h>
     typedef size_t z_size_t;
#  else
     typedef unsigned long z_size_t;
#  endif
#  undef z_longlong
#endif

[root@test ~/install-test/zlib-1.2.13]# make clean
rm -f *.o *.lo *~ \
   example minigzip examplesh minigzipsh \
   example64 minigzip64 \
   infcover \
   libz.* foo.gz so_locations \
   _match.s maketree contrib/infback9/*.o
rm -rf objs
rm -f *.gcda *.gcno *.gcov
rm -f contrib/infback9/*.gcda contrib/infback9/*.gcno contrib/infback9/*.gcov
[root@test ~/install-test/zlib-1.2.13]# make
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN -I. -c -o example.o test/example.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o adler32.o adler32.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o crc32.o crc32.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o deflate.o deflate.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o infback.o infback.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o inffast.o inffast.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o inflate.o inflate.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o inftrees.o inftrees.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o trees.o trees.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o zutil.o zutil.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o compress.o compress.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o uncompr.o uncompr.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o gzclose.o gzclose.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o gzlib.o gzlib.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o gzread.o gzread.c
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN  -c -o gzwrite.o gzwrite.c
ar rc libz.a adler32.o crc32.o deflate.o infback.o inffast.o inflate.o inftrees.o trees.o zutil.o compress.o uncompr.o gzclose.o gzlib.o gzread.o gzwrite.o
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN -o example example.o -L/usr/local/zlib/lib -L/usr/bin/openssl -L. libz.a
gcc -I/usr/local/zlib/include -D_LARGEFILE64_SOURCE=1 -DHAVE_HIDDEN -I. -c -o minigzip.o test/minigzip.c
test/minigzip.c: In function ‘file_uncompress’:
test/minigzip.c:503:5: error: unknown type name ‘z_size_t’
     z_size_t len = strlen(file);
     ^
make: *** [minigzip.o] Error 1
[root@test ~/install-test/zlib-1.2.13]#