From 416e3ee4b07d9ed30ada45eee736d877efe139db Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sat, 20 May 2000 11:00:14 +0000
Subject: Get Linux version from <linux/version.h>, not `uname -r`.

---
 configure.in | 71 ++++++++++++++++++++++++++++++++----------------------------
 1 file changed, 38 insertions(+), 33 deletions(-)

(limited to 'configure.in')

diff --git a/configure.in b/configure.in
index 6d58e7c..2ddb7ab 100644
--- a/configure.in
+++ b/configure.in
@@ -50,7 +50,35 @@ else
 fi
 
 AC_CANONICAL_HOST
-AC_MSG_CHECKING([which OS configuration should we use])
+
+AC_PROG_CC
+if test -z "$GCC" ; then
+	AC_MSG_ERROR([This program requires the GNU C Compiler.])
+	fi
+AC_MSG_CHECKING([what CFLAGS should we use])
+if test "$ac_test_CFLAGS" != set ; then
+	if test "$enable_warnings" = yes ; then
+		WARNS=""
+	else
+		WARNS=" -Wno-unused"
+	fi
+	CFLAGS="$CFLAGS -Wall -W -Wstrict-prototypes -Wno-parentheses$WARNS"
+fi
+if test "$with_sysinclude" != no -a -n "$with_sysinclude"; then
+	CPPFLAGS="$CPPFLAGS -I$with_sysinclude"
+fi
+AC_MSG_RESULT($CFLAGS)
+
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_PROG_RANLIB
+AC_CHECK_PROG(FLEX, flex, flex)
+AC_CHECK_PROG(BISON, bison, bison)
+AC_CHECK_PROGS(M4, gm4 m4, m4)
+if test -z "$FLEX" -o -z "$BISON" -o -z "$M4" ; then
+	AC_MSG_ERROR([Some tools required for building BIRD are missing.])
+	fi
+
 if test -n "$with_sysconfig" -a "$with_sysconfig" != no ; then
 	if test -f $with_sysconfig ; then
 		sysdesc=$with_sysconfig
@@ -64,19 +92,24 @@ elif test -f sysconfig.h ; then
 	sysdesc=sysconfig
 else
 	case "$ip:$host_os" in
-		ipv4:linux*)	case `uname -r` in
+		ipv4:linux*)	BIRD_CHECK_LINUX_VERSION
+				case $bird_cv_sys_linux_version in
 					1.*|2.0.*)	sysdesc=linux-20 ;;
 					*)		sysdesc=linux-22 ;;
 					esac
 				;;
-		ipv6:linux*)	sysdesc=linux-v6
+		ipv6:linux*)	BIRD_CHECK_LINUX_VERSION
+				case $bird_cv_sys_linux_version in
+					1.*|2.0.*)	AC_MSG_ERROR([This version of Linux doesn't support IPv6.]) ;;
+					*)		sysdesc=linux-v6 ;;
+					esac
 				;;
-		*)		AC_MSG_RESULT(unknown)
-				AC_MSG_ERROR([Cannot determine correct system configuration.])
+		*)		AC_MSG_ERROR([Cannot determine correct system configuration. Please use --with-sysconfig to set it manually.])
 				;;
 		esac
 	sysdesc=$srcdir/sysdep/cf/$sysdesc.h
 fi
+AC_MSG_CHECKING([which OS configuration should we use])
 AC_MSG_RESULT($sysdesc)
 if ! test -f $sysdesc ; then
 	AC_MSG_ERROR([The system configuration file is missing.])
@@ -102,34 +135,6 @@ for a in $protocols ; do
 AC_MSG_RESULT(ok)
 AC_SUBST(protocols)
 
-AC_PROG_CC
-if test -z "$GCC" ; then
-	AC_MSG_ERROR([This program requires the GNU C Compiler.])
-	fi
-AC_MSG_CHECKING([what CFLAGS should we use])
-if test "$ac_test_CFLAGS" != set ; then
-	if test "$enable_warnings" = yes ; then
-		WARNS=""
-	else
-		WARNS=" -Wno-unused"
-	fi
-	CFLAGS="$CFLAGS -Wall -W -Wstrict-prototypes -Wno-parentheses$WARNS"
-fi
-if test "$with_sysinclude" != no -a -n "$with_sysinclude"; then
-	CPPFLAGS="$CPPFLAGS -I$with_sysinclude"
-fi
-AC_MSG_RESULT($CFLAGS)
-
-AC_PROG_CPP
-AC_PROG_INSTALL
-AC_PROG_RANLIB
-AC_CHECK_PROG(FLEX, flex, flex)
-AC_CHECK_PROG(BISON, bison, bison)
-AC_CHECK_PROGS(M4, gm4 m4, m4)
-if test -z "$FLEX" -o -z "$BISON" -o -z "$M4" ; then
-	AC_MSG_ERROR([Some tools required for building BIRD are missing.])
-	fi
-
 case $sysdesc in
 	*/linux-22*|*/linux-v6*)
 		AC_CHECK_HEADER(linux/rtnetlink.h,,[AC_MSG_ERROR([Appropriate version of Linux kernel headers not found.])])
-- 
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