AC_DEFUN([AC_ZLIB],[ AC_CHECK_HEADERS(zlib.h) AC_CHECK_LIB_EXT(z, ZLIB_LIBS, zlibVersion) AC_CACHE_CHECK([for zlib >= 1.2.3], samba_cv_zlib_1_2_3, [ AC_TRY_COMPILE([ #include <zlib.h> ],[ #if (ZLIB_VERNUM >= 0x1230) #else #error "ZLIB_VERNUM < 0x1230" #endif ],[ samba_cv_zlib_1_2_3=yes ],[ samba_cv_zlib_1_2_3=no ]) ]) if test x"$ac_cv_header_zlib_h" = x"yes" -a \ x"$ac_cv_lib_ext_z_zlibVersion" = x"yes" -a \ x"$samba_cv_zlib_1_2_3" = x"yes"; then $1 else $2 fi ])