slackware-current/source/a/infozip/unzip.use.system.libbz2.diff

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--- ./unix/configure.orig 2009-04-16 14:25:12.000000000 -0500
+++ ./unix/configure 2013-09-12 13:32:24.274604436 -0500
@@ -640,7 +640,24 @@
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 $? -eq 0; then
+ echo "-- OS supports bzip2 - linking in bzip2"
+ D_USE_BZ2="-DUSE_BZIP2"
+ L_BZ2="${BZLF} -lbz2"
+ else
+ echo "-- Either bzlib.h or libbz2.a not found - no bzip2"
+ fi
fi
fi