trying to compile a utility in Openwrt and when pip-install is selected and zlib is linked to python I get this:


staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_crc32':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:1045: undefined reference to `crc32'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:1053: undefined reference to `crc32'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_adler32':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:1013: undefined reference to `adler32'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:1021: undefined reference to `adler32'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `Decomp_dealloc':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:469: undefined reference to `inflateEnd'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `Comp_dealloc':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:459: undefined reference to `deflateEnd'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_objcompress':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:504: undefined reference to `deflate'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_copy':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:772: undefined reference to `deflateCopy'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_uncopy':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:821: undefined reference to `inflateCopy'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_decompressobj':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:434: undefined reference to `inflateInit2_'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_compressobj':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:398: undefined reference to `deflateInit2_'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_objdecompress':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:632: undefined reference to `inflate'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_decompress':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:308: undefined reference to `inflateInit2_'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:335: undefined reference to `inflate'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:360: undefined reference to `inflateEnd'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:318: undefined reference to `inflateEnd'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:344: undefined reference to `inflateEnd'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:349: undefined reference to `inflateEnd'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:330: undefined reference to `inflateEnd'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o):build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:365: more undefined references to `inflateEnd' follow
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_unflush':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:892: undefined reference to `inflate'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:918: undefined reference to `inflateEnd'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_flush':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:713: undefined reference to `deflate'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:728: undefined reference to `deflateEnd'
staging_dir/hostpkg/lib/libpython2.7.a(zlibmodule.o): In function `PyZlib_compress':
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:220: undefined reference to `deflateInit_'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:233: undefined reference to `deflateEnd'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:250: undefined reference to `deflate'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:245: undefined reference to `deflateEnd'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:254: undefined reference to `deflateEnd'
build_dir/hostpkg/Python-2.7.14/./Modules/zlibmodule.c:265: undefined reference to `deflateEnd'
collect2: error: ld returned 1 exit status

python has access to zlib headers and libraries