From 4c32cd4444270c94249f0f161951c4e9465e7c3e Mon Sep 17 00:00:00 2001
From: Thomas Miedema <thomasmiedema@gmail.com>
Date: Fri, 4 Jul 2014 16:42:21 +0200
Subject: Add haddock comments on RTLD_NEXT and RTLD_DEFAULT

Related ticket: #8902.
---
 configure.ac | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index f295061..57b7cf7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -124,7 +124,9 @@ case "$fptools_cv_func_unsetenv_return_type" in
   ;;
 esac
 
-dnl ** sometimes RTLD_NEXT is hidden in #ifdefs we really don't wan to set
+dnl On some hosts (e.g. SuSe and Ubuntu Linux) RTLD_NEXT and RTLD_DEFAULT are
+dnl not visible without setting _GNU_SOURCE, which we really don't want to.
+dnl Also see comments in System/Posix/DynamicLinker/Prim.hsc.
 AC_MSG_CHECKING(for RTLD_NEXT from dlfcn.h)
 AC_EGREP_CPP(yes,
 [
@@ -139,7 +141,6 @@ AC_EGREP_CPP(yes,
   AC_MSG_RESULT(no)
   ])    
 
-dnl ** RTLD_DEFAULT isn't available on cygwin
 AC_MSG_CHECKING(for RTLD_DEFAULT from dlfcn.h)
 AC_EGREP_CPP(yes,
 [
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