(I am not the one with the problem here, but reporting on behalf to stick to the protocol. Please ignore your user agent's default reply to address and send replies to the list, not to me.) The following build error appears for a user that compiles on a Mac: gcc -g -O2 -std=c99 -Wall -W -Werror-implicit-function-declaration -Werror -Wno-format -Wno-unused-function -Wno-unused-label -Wno-uninitialized -D_REENTRANT -o .libs/MapiClient MapiClient.o ReadlineTools.o -L/sw/lib ./.libs/libMapi.dylib /Users/rvjansen/Desktop/MonetDB/src/common/.libs/libstream.dylib -lreadline ../../../common/.libs/libmutils.dylib ../../../common/.libs/libstream.dylib /Users/rvjansen/Desktop/MonetDB/src/common/.libs/libmutils.dylib -lz /sw/lib/libiconv.dylib ld: Undefined symbols: _BZ2_bzclose _BZ2_bzflush _BZ2_bzopen _BZ2_bzread _BZ2_bzwrite make[7]: *** [MapiClient] Error 1 make[6]: *** [all] Error 2 make[5]: *** [all-recursive] Error 1 make[4]: *** [all-recursive] Error 1 make[3]: *** [all] Error 2 make[2]: *** [all-recursive] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 The user's tools versions: automake 1.9.3 aclocal 1.9.3 autoconf 2.59 libtool ? (there is no --version: default Apple distribution one)