From e3a240da05256411347a928ce26cba6cfdd6cbc3 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@keybit.net>
Date: Mon, 26 Oct 2015 08:33:57 +0000
Subject: [PATCH] Accept --with-sfcgal with no arguments as a valid way to
 enable it

Closes #3348

git-svn-id: http://svn.osgeo.org/postgis/trunk@14328 b70326c6-7e19-0410-871a-916f4a2858ee
---
 configure.ac | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 1a7adcb1a..81170fa29 100644
--- a/configure.ac
+++ b/configure.ac
@@ -664,11 +664,14 @@ dnl ===========================================================================
 AC_ARG_WITH([sfcgal], 
 	[AS_HELP_STRING([--with-sfcgal=PATH], [Add SFCGAL support. ARG allows to specify an alternate PATH to sfcgal-config])], 
 	[SFCGAL_CONFIG="$withval"], 
-	[AC_PATH_PROG([SFCGAL_CONFIG], [sfcgal-config], [])])
+	[with_sfcgal=yes])
 
 HAVE_SFCGAL="no"
 
 if test "x$with_sfcgal" != "xno"; then
+  if test "x$with_sfcgal" = "xyes"; then
+	  AC_PATH_PROG([SFCGAL_CONFIG], [sfcgal-config], [])
+  fi
 	if test -x "$SFCGAL_CONFIG"; then
 		SFCGAL_VERSION=`$SFCGAL_CONFIG --version` || AC_MSG_ERROR([cannot determine sfcgal version (tried with $SFCGAL_CONFIG --version)])
 		SFCGAL_LDFLAGS=`$SFCGAL_CONFIG --libs`
-- 
2.40.0