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-rw-r--r--configure.ac7
1 files changed, 6 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index ea49c18..26bd5f4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,13 +31,18 @@ AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([foreign dist-bzip2])
AM_MAINTAINER_MODE
+# 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 or XORG_DEFAULT_OPTIONS) to avoid autoconf errors.
+AC_USE_SYSTEM_EXTENSIONS
+
# Require X.Org macros 1.8 or later for MAN_SUBSTS set by XORG_MANPAGE_SECTIONS
m4_ifndef([XORG_MACROS_VERSION],
[m4_fatal([must install xorg-macros 1.8 or later before running autoconf/autogen])])
XORG_MACROS_VERSION(1.8)
XORG_DEFAULT_OPTIONS
-AC_CHECK_FUNCS([mkstemp mktemp])
+AC_CHECK_FUNCS([asprintf mkstemp mktemp])
# Checks for pkg-config packages
PKG_CHECK_MODULES(SMPROXY, [sm ice xt xmuu])