- dnl Look for libbz2, a required dependency.
- AC_CHECK_LIB([bz2], [BZ2_bzWriteOpen], [true],
- [AC_MSG_ERROR([Guix requires libbz2, which is part of bzip2. See http://www.bzip.org/.])])
- AC_CHECK_HEADERS([bzlib.h], [true],
- [AC_MSG_ERROR([Guix requires libbz2, which is part of bzip2. See http://www.bzip.org/.])])
+ dnl Look for zlib, a required dependency.
+ AC_CHECK_LIB([z], [gzdopen], [true],
+ [AC_MSG_ERROR([Guix requires zlib. See http://www.zlib.net/.])])
+ AC_CHECK_HEADERS([zlib.h], [true],
+ [AC_MSG_ERROR([Guix requires zlib. See http://www.zlib.net/.])])
+
+ dnl Look for libbz2, an optional dependency.
+ AC_CHECK_LIB([bz2], [BZ2_bzWriteOpen], [HAVE_LIBBZ2=yes], [HAVE_LIBBZ2=no])
+ if test "x$HAVE_LIBBZ2" = xyes; then
+ AC_CHECK_HEADERS([bzlib.h])
+ HAVE_LIBBZ2="$ac_cv_header_bzlib_h"
+ fi