1dnl A function to check for zlib availability. zlib is used by default 2dnl unless the user configured with --disable-nls. 3 4AC_DEFUN([AM_ZLIB], 5[ 6 # See if the user specified whether he wants zlib support or not. 7 AC_ARG_WITH(zlib, 8 [ --with-zlib include zlib support (auto/yes/no) [default=auto]], 9 [], [with_zlib=auto]) 10 11 if test "$with_zlib" != "no"; then 12 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)]) 13 if test "$with_zlib" = "yes" -a "$ac_cv_header_zlib_h" != "yes"; then 14 AC_MSG_ERROR([zlib (libz) library was explicitly requested but not found]) 15 fi 16 fi 17]) 18 19