From 1bc490077a804d6ebccbf0276e20a2e14323c69f Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Tue, 22 Jul 2008 19:04:16 +0000
Subject: Make sure that configure process tests are done with the same
 _REENTRANT setting as the one actually used when finally building the
 library.

---
 ares/acinclude.m4 | 25 +++++++++++++++++++++++++
 ares/configure.ac |  3 +++
 2 files changed, 28 insertions(+)

(limited to 'ares')

diff --git a/ares/acinclude.m4 b/ares/acinclude.m4
index 9eb8d0c07..10de92717 100644
--- a/ares/acinclude.m4
+++ b/ares/acinclude.m4
@@ -88,6 +88,31 @@ CURL_DEF_TOKEN $1
 ])
 
 
+dnl CONFIGURE_WITH_REENTRANT
+dnl -------------------------------------------------
+dnl This macro ensures that configuration tests done
+dnl after this will execute with preprocessor symbol
+dnl _REENTRANT defined. This macro also ensures that
+dnl the generated config file will equally define it.
+
+AC_DEFUN([CONFIGURE_WITH_REENTRANT], [
+AC_BEFORE([$0], [AC_PREPROC_IFELSE])dnl
+AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
+AC_BEFORE([$0], [AC_LINK_IFELSE])dnl
+AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
+AH_VERBATIM([_REENTRANT],
+[/* Define _REENTRANT if not already defined */
+@%:@ifndef _REENTRANT
+@%:@ define _REENTRANT
+@%:@endif])
+cat >>confdefs.h <<_ACEOF
+[@%:@ifndef _REENTRANT
+@%:@ define _REENTRANT
+@%:@endif]
+_ACEOF
+])
+
+
 dnl CURL_CHECK_HEADER_WINDOWS
 dnl -------------------------------------------------
 dnl Check for compilable and valid windows.h header 
diff --git a/ares/configure.ac b/ares/configure.ac
index 66f44f45a..2266b1480 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -75,6 +75,9 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_INSTALL
 
+dnl Our configure and build reentrant settings
+CONFIGURE_WITH_REENTRANT
+
 dnl check for how to do large files
 AC_SYS_LARGEFILE
 
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