@@ -7,26 +7,29 @@
 AC_PROG_INSTALL
 AC_AIX
 AC_GNU_SOURCE
 
 dnl Find the appropriate libraries to link to
-AC_SEARCH_LIBS(inflate, z zlib,, [ AC_MSG_WARN([Couldn't find inflate (normally in zlib)!]) ])
 AC_SEARCH_LIBS(acos, m,, [ AC_MSG_WARN([Couldn't find acos (normally in libm)!]) ])
 AC_SEARCH_LIBS(dlsym, dl,, [ AC_MSG_WARN([Couldn't find dlsym (normally in libdl)!]) ])
 
 dnl Find the appropriate Tcl headers and libraries
 DC_DO_TCL
 
 dnl Find archives we need to link to
 DC_FIND_TCLKIT_LIBS
 
-dnl Find any platform specific defines that we need to make
-DC_SETUP_TCL_PLAT_DEFS
-
 dnl Determine if we have "Tcl_SetStartupScript" (8.6.x) or "TclSetStartupScriptPath" (8.4.x)
 SAVE_LIBS="${LIBS}"
 LIBS="${ARCHS} ${LIBS}"
 AC_CHECK_FUNCS(Tcl_SetStartupScript TclSetStartupScriptPath)
 LIBS="${SAVE_LIBS}"
 
+dnl Find zlib
+AC_ARG_WITH(zlib, AC_HELP_STRING([--with-zlib], [directory containing zlib]), [
+	CFLAGS="${CFLAGS} -I${with_zlib}/include -I${with_zlib}"
+	LDFLAGS="${CFLAGS} -L${with_zlib}/lib -L${with_zlib}"
+])
+AC_SEARCH_LIBS(inflate, z zlib,, [ AC_MSG_WARN([Couldn't find inflate (normally in zlib)!]) ])
+
 dnl Produce output
 AC_OUTPUT(Makefile)