[root@miparaguana zlib-1.2.3]# make clean rm -f *.o *~ example minigzip \ libz.* foo.gz so_locations \ _match.s maketree contrib/infback9/*.o [root@miparaguana zlib-1.2.3]# ./configure -s Checking for gcc... Checking for shared library support... No shared library support. Building static library libz.a version 1.2.3 with cc. Checking for unistd.h... No. Checking whether to use vs[n]printf() or s[n]printf()... using s[n]printf() Checking for snprintf() in stdio.h... No. WARNING: snprintf() not found, falling back to sprintf(). zlib can build but will be open to possible buffer-overflow security vulnerabilities. Checking for return value of sprintf()... No. WARNING: apparently sprintf() does not return a value. zlib can build but will be open to possible string-format security vulnerabilities. Checking for errno.h... No. Checking for mmap support... No. Im looking on the forum and nothing about that, have any idea?