diff -up unzip60/unix/configure.bzip2-configure unzip60/unix/configure --- unzip60/unix/configure.bzip2-configure 2009-04-16 21:25:12.000000000 +0200 +++ unzip60/unix/configure 2009-11-18 11:22:14.598389194 +0100 @@ -640,7 +640,24 @@ else D_USE_BZ2="-DUSE_BZIP2" L_BZ2="${BZLF} -lbz2" else - echo "-- bzip2 sources not found - no bzip2 support" + echo " Check if OS already has bzip2 library installed" + cat > conftest.c << _EOF_ +#include "bzlib.h" +int main() +{ + bz_stream strm; + BZ2_bzCompressEnd(&strm); + return 0; +} +_EOF_ + $CC $CFLAGS -o conftest conftest.c -lbz2 > /dev/null 2>/dev/null + if test $? -eq 0; then + echo "-- OS supports bzip2 - linking in bzip2" + D_USE_BZ2="-DBZIP2_SUPPORT" + L_BZ2="${BZLF} -lbz2" + else + echo "-- Either bzlib.h or libbz2.a not found - no bzip2" + fi fi fi