Build error because of "-lz"

Hi, when I'm building a package, I got this error: gcc -g -O2 -o .libs/example1 example1.o ../../src/.libs/libsimgrid.so \ -lpthread /usr/lib/libxml2.so -lz -lm -Wl,--rpath -Wl,/usr/local/lib \ /usr/lib/gcc-lib/i486-suse-linux/3.3/../../../../i486-suse-linux/bin/ld:\ cannot find -lz collect2: ld returned 1 exit status I'd like to know if this is because I'm missing some packages/settings before I contact the maintainer? TIA. -- -- Verdi March --