Checking for gcc...
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.
[root@localhost zlib-1.2.3]# make
cc -O -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o example.o example.c
make: cc: Command not found
make: *** [example.o] Error 127



This is happening when i try to install tar xvfz zlib-1.2.3.tar.gz

Looks like you need to install a compiler and other development tools.

Please put your distro in your profile (it will show in the panel on the left with each post, making it possible for people to give you direct advice without always asking the question...)

Which distro are you using?

these rpms must be installed in order to install the C compiler and related
tools required for compling C source code.


1. gcc-3 2. dev86 3. cpp-
4. make- 5. binutils- 6. glibc-devel
7. ncurses- 8. ncurses-devel-

He might not be using an rpm based system... Anyway I'd recommend using the relevant pkg mgr rather than manual install for stuff where possible.