zlib filed tp build under os 10.5 intel core duo 1.86GHz -d output contained: 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. ---> Building zlib with target all DEBUG: Executing org.macports.build (zlib) DEBUG: Environment: DEBUG: Assembled command: 'cd "/opt/local/var/macports/build/ _opt_local_var_macports_sources_rsync .macports.org_release_ports_archivers_zlib/work/zlib-1.2.3" && make all' O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o example.o example.c make: O2: Command not found make: [example.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o adler32.o adler32.c make: O2: Command not found make: [adler32.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o compress.o compress.c make: O2: Command not found make: [compress.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o crc32.o crc32.c make: O2: Command not found make: [crc32.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o gzio.o gzio.c make: O2: Command not found make: [gzio.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o uncompr.o uncompr.c make: O2: Command not found make: [uncompr.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o deflate.o deflate.c make: O2: Command not found make: [deflate.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o trees.o trees.c make: O2: Command not found make: [trees.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o zutil.o zutil.c make: O2: Command not found make: [zutil.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o inflate.o inflate.c make: O2: Command not found make: [inflate.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o infback.o infback.c make: O2: Command not found make: [infback.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o inftrees.o inftrees.c make: O2: Command not found make: [inftrees.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o inffast.o inffast.c make: O2: Command not found make: [inffast.o] Error 127 (ignored) ar rc libz.a adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o zutil.o inflate.o infback.o inftrees.o inffast.o ar: adler32.o: No such file or directory ar: compress.o: No such file or directory ar: crc32.o: No such file or directory ar: gzio.o: No such file or directory ar: uncompr.o: No such file or directory ar: deflate.o: No such file or directory ar: trees.o: No such file or directory ar: zutil.o: No such file or directory ar: inflate.o: No such file or directory ar: infback.o: No such file or directory ar: inftrees.o: No such file or directory ar: inffast.o: No such file or directory make: *** [libz.a] Error 1 Error: Target org.macports.build returned: shell command " cd "/opt/ local/var/macports/build/ _opt_local_var_macports_sources_rsync .macports.org_release_ports_archivers_zlib/work/zlib-1.2.3" && make all " returned error 2 Command output: make: [trees.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o zutil.o zutil.c make: O2: Command not found make: [zutil.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o inflate.o inflate.c make: O2: Command not found make: [inflate.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o infback.o infback.c make: O2: Command not found make: [infback.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o inftrees.o inftrees.c make: O2: Command not found make: [inftrees.o] Error 127 (ignored) O2 -DNO_snprintf -DHAS_sprintf_void -DNO_ERRNO_H -c -o inffast.o inffast.c make: O2: Command not found make: [inffast.o] Error 127 (ignored) ar rc libz.a adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o zutil.o inflate.o infback.o inftrees.o inffast.o ar: adler32.o: No such file or directory ar: compress.o: No such file or directory ar: crc32.o: No such file or directory ar: gzio.o: No such file or directory ar: uncompr.o: No such file or directory ar: deflate.o: No such file or directory ar: trees.o: No such file or directory ar: zutil.o: No such file or directory ar: inflate.o: No such file or directory ar: infback.o: No such file or directory ar: inftrees.o: No such file or directory ar: inffast.o: No such file or directory make: *** [libz.a] Error 1 Warning: the following items did not execute (for zlib): org.macports.destroot org.macports.build DEBUG: wrong # args: should be "md5 action ?file?" while executing "md5 $fname"