From: Tay Ray Chuan <raychuan@iweb.nus.edu.sg>
Date: Tue, 15 Jan 2013 04:52:08 +0000 (+0800)
Subject: Fix missing AC_PROG_SED on older Autoconfs
X-Git-Tag: release-2.1.3-alpha~24^2^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9ab2b3f7496c05091ad2ac31ede2e8e806b85e38;p=libevent

Fix missing AC_PROG_SED on older Autoconfs

For pre-2.59b Autoconfs, AC_PROG_SED is not available [1]; on such
systems, avoid calling AC_PROG_SED, while providing a sensible SED.

This aids backporting to Autoconf 2.59.

[1] http://lists.gnu.org/archive/html/autotools-announce/2004-08/msg00002.html
---

diff --git a/configure.in b/configure.in
index a69650f6..9904bdb1 100644
--- a/configure.in
+++ b/configure.in
@@ -35,11 +35,16 @@ esac
 dnl Checks for programs.
 AC_PROG_CC
 AM_PROG_CC_C_O
-AC_PROG_SED
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MKDIR_P
 
+# AC_PROG_SED is only available in Autoconf >= 2.59b; workaround for older
+# versions
+ifdef([AC_PROG_SED], [AC_PROG_SED], [
+AC_CHECK_PROGS(SED, [gsed sed])
+])
+
 AC_PROG_GCC_TRADITIONAL
 
 # We need to test for at least gcc 2.95 here, because older versions don't