From cb7e9e67ca8504ec45d51eddaf37cdf5b4822853 Mon Sep 17 00:00:00 2001
From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Thu, 12 May 2005 22:03:33 +0000
Subject: [PATCH] make sure the header gets tested twice

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@551 a5681a0c-68f1-0310-ab6d-d61299d08faa
---
 acinclude.m4 | 7 +++++--
 configure.ac | 4 ++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/acinclude.m4 b/acinclude.m4
index 6ada55c..0143cb4 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -21,7 +21,7 @@ AC_DEFUN([EX_CHECK_ALL],
  ex_check_save_CPPFLAGS=${CPPFLAGS}
  ex_check_save_LDFLAGS=${LDPFLAGS}
  if test "x$7" != "x"; then
-   CPPFLAGS="-I$7 $CPPFLAGS"
+   CPPFLAGS="$CPPFLAGS -I$7"
  fi
  dnl try compiling naked first
  AC_CHECK_LIB($1,$2, [
@@ -37,7 +37,10 @@ AC_DEFUN([EX_CHECK_ALL],
              LIBS=${LIBS}" "`$PKGCONFIG --libs-only-l $4`
 	     dnl remove the cached value and test again
 	     unset ac_cv_lib_$1_$2
-             AC_CHECK_LIB($1,$2,[ AC_CHECK_HEADER($3,[EX_CHECK_STATE=YES],[])],[])
+             AC_CHECK_LIB($1,$2,[
+	         unset ac_cv_header_`echo $3 | sed "s/[^a-z]/_/"`
+		 AC_CHECK_HEADER($3,[EX_CHECK_STATE=YES],[])
+	     ],[])
           else
              AC_MSG_WARN([
 ----------------------------------------------------------------------------
diff --git a/configure.ac b/configure.ac
index 912e68b..fd6f52e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -166,6 +166,10 @@ AC_STRUCT_TM
 
 dnl Checks for libraries.
 AC_CHECK_FUNC(acos, , AC_CHECK_LIB(m, acos))
+dnl Use libiconv if we have one but fall back to libc otherwhise
+AC_CHECK_LIB(iconv, iconv_open, , [
+         AC_CHECK_FUNC(iconv_open,,)
+         ])
 
 dnl add pic flag in any case this makes sure all our code is relocatable
 eval `./libtool --config | grep pic_flag`
-- 
2.11.0