Rename README to make software forges properly render Markdown.

[tinc] / configure.ac

diff --git a/configure.ac b/configure.ac
index dc24f7c..db7d1aa 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 
 origcflags="$CFLAGS"
 
-AC_PREREQ(2.61)
+AC_PREREQ(2.69)
 AC_INIT([tinc], m4_esyscmd_s((git describe || echo UNKNOWN) | sed 's/release-//'))
 AC_CONFIG_SRCDIR([src/tincd.c])
 AM_INIT_AUTOMAKE([std-options subdir-objects nostdinc silent-rules -Wall])
@@ -10,14 +10,11 @@ AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([m4])
 AM_SILENT_RULES([yes])
 
-# Enable GNU extensions.
-# Define this here, not in acconfig's @TOP@ section, since definitions
-# in the latter don't make it into the configure-time tests.
-AC_GNU_SOURCE
-AC_DEFINE([__USE_BSD], 1, [Enable BSD extensions])
+AC_USE_SYSTEM_EXTENSIONS
 
 dnl Checks for programs.
-AC_PROG_CC_C99
+AC_PROG_CC
+AC_PROG_CC_STDC
 AC_PROG_CPP
 AC_PROG_INSTALL
 AM_PROG_CC_C_O
@@ -93,8 +90,12 @@ AC_ARG_ENABLE(uml,
 AC_ARG_ENABLE(vde,
   AS_HELP_STRING([--enable-vde], [enable support for Virtual Distributed Ethernet]),
   [ AS_IF([test "x$enable_vde" = "xyes"],
-      [ AC_CHECK_HEADERS(libvdeplug_dyn.h, [], [AC_MSG_ERROR([VDE plug header files not found.]); break])
-        AC_CHECK_LIB(dl, dlopen, [LIBS="$LIBS -ldl"], [AC_MSG_ERROR([VDE plug depends on libdl.]); break])
+      [ AC_CHECK_HEADERS(libvdeplug.h,
+        [AC_CHECK_LIB(vdeplug, vde_close,
+                      [LIBS="$LIBS -lvdeplug"],
+                      [AC_MSG_ERROR("VDE plug library files not found.")]
+        )],
+        [AC_MSG_ERROR([VDE plug header files not found.]); break])
         AC_DEFINE(ENABLE_VDE, 1, [Support for VDE])
         vde=true
       ],
@@ -134,6 +135,7 @@ AM_CONDITIONAL(UML, test "$uml" = true)
 AM_CONDITIONAL(VDE, test "$vde" = true)
 AM_CONDITIONAL(TUNEMU, test "$tunemu" = true)
 AM_CONDITIONAL(WITH_SYSTEMD, test "$systemd" = true)
+AM_CONDITIONAL(WITH_LEGACY_PROTOCOL, test "x$enable_legacy_protocol" != "xno")
 
 AC_CACHE_SAVE
 
@@ -189,7 +191,6 @@ AC_CHECK_TYPES([struct ether_header, struct arphdr, struct ether_arp, struct ip,
 )
 
 dnl Checks for library functions.
-AC_TYPE_SIGNAL
 AC_CHECK_FUNCS([asprintf daemon fchmod flock fork gettimeofday mlockall putenv recvmmsg strsignal nanosleep unsetenv vsyslog devname fdevname],
   [], [], [#include "$srcdir/src/have.h"]
 )
@@ -239,6 +240,7 @@ tinc_CURSES
 tinc_READLINE
 tinc_ZLIB
 tinc_LZO
+tinc_LZ4
 
 AS_IF([test "x$enable_legacy_protocol" != "xno"],
       [AS_IF([test -n "$with_libgcrypt"],