Author: Kev <klmitch@mit.edu>

[ircu2.10.12-pk.git] / configure.in

diff --git a/configure.in b/configure.in
index 7c5e5b760578a4aa49b27b5d89c412a52ad05a80..4d3450efdbe6df52c109c934508be0c45df93860 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -41,8 +41,8 @@ ac_default_prefix=$unet_cv_prefix
 dnl Define the input and output configuration header file.
 AC_CONFIG_HEADER([config.h])
 
-dnl Demand at least version 2.13 of autoconf
-AC_PREREQ(2.13)
+dnl Demand at least version 2.50 of autoconf
+AC_PREREQ(2.50)
 
 dnl Find out what type of system we are
 AC_CANONICAL_HOST
@@ -108,7 +108,7 @@ AC_LIBRARY_NET
 
 dnl Checks for header files.
 AC_HEADER_STDC
-AC_CHECK_HEADERS(crypt.h poll.h stdint.h sys/devpoll.h sys/epoll.h sys/event.h sys/param.h sys/socket.h)
+AC_CHECK_HEADERS(crypt.h poll.h inttypes.h stdint.h sys/devpoll.h sys/epoll.h sys/event.h sys/param.h sys/socket.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics
 dnl AC_C_CONST
@@ -137,13 +137,34 @@ AC_PROG_AWK
 AC_PROG_MAKE_SET
 AC_PROG_INSTALL
 AC_PROG_LN_S
-AC_PROG_LEX
-AC_PROG_YACC
 AC_PATH_PROGS(RMPROG, rm, /bin/rm)
 AC_PATH_PROGS(SHPROG, sh, /bin/sh)
 
+dnl (F)LEX - needed for the new conf file parser
+AC_PROG_LEX
+if test -x "$LEX"
+then 
+  AC_MSG_ERROR([Cannot find flex.])
+fi
+
+if test -z "$LEXLIB"
+then
+  AC_MSG_FAILURE([
+  Cannot find a library with yywrap() in, but flex was found.  
+  It's possible the compiler you're using ($CC) is incompatible with the 
+  installed library.])
+fi
+
 LIBS="$LEXLIB $LIBS"
 
+dnl YACC - ditto
+AC_PROG_YACC
+if test -z "$YACC"
+then
+  AC_MSG_ERROR([Cannot find yacc.])
+fi
+
+
 unet_NONBLOCKING
 unet_SIGNALS