Allow xcb_send_request with >MAX_IOV iovecs

[free-sw/xcb/libxcb] / configure.ac

diff --git a/configure.ac b/configure.ac
index 9abaffc..3f44b53 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1,11 +1,18 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
+# Initialize Autoconf
 AC_PREREQ(2.57)
 AC_INIT([libxcb],
-        1.8,
+        1.8.1,
         [xcb@lists.freedesktop.org])
 AC_CONFIG_SRCDIR([xcb.pc.in])
+# Set common system defines for POSIX extensions, such as _GNU_SOURCE
+# Must be called before any macros that run the compiler (like AC_PROG_LIBTOOL)
+# to avoid autoconf errors.
+AC_USE_SYSTEM_EXTENSIONS
+
+# Initialize Automake
 AM_INIT_AUTOMAKE([foreign dist-bzip2])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
@@ -110,6 +117,13 @@ dnl check for support for Solaris Trusted Extensions
 AC_CHECK_HEADERS([tsol/label.h])
 AC_CHECK_FUNCS([is_system_labeled])
 
+dnl check for IOV_MAX, and fall back to UIO_MAXIOV on BSDish systems
+AC_CHECK_DECL([IOV_MAX], [],
+             [AC_CHECK_DECL([UIO_MAXIOV], [AC_DEFINE([IOV_MAX], [UIO_MAXIOV])],
+                                          [AC_DEFINE([IOV_MAX], [16], [Define if not provided by <limits.h>])],
+                                          [[#include <sys/uio.h>]])],
+             [[#include <limits.h>]])
+
 xcbincludedir='${includedir}/xcb'
 AC_SUBST(xcbincludedir)