From: Ivan Maidanski <ivmai@mail.ru>
Date: Sat, 14 Sep 2013 08:20:17 +0000 (+0400)
Subject: Detect dladdr() presence by configure
X-Git-Tag: gc7_4_0~20
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5dedb24;p=gc

Detect dladdr() presence by configure

* configure.ac (have_dladdr): Add check for "dladdr" presence.
* configure.ac (HAVE_DLADDR): New AC define based on have_dladdr.
---

diff --git a/configure.ac b/configure.ac
index 87c6c864..031b129f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -715,6 +715,20 @@ AC_ARG_ENABLE(gc-debug,
 AM_CONDITIONAL([MAKE_BACK_GRAPH], [test x"$enable_gc_debug" = xyes])
 AM_CONDITIONAL([KEEP_BACK_PTRS], [test x"$keep_back_ptrs" = xtrue])
 
+# Check for dladdr (used for debugging).
+AC_MSG_CHECKING(for dladdr)
+have_dladdr=no
+AC_TRY_COMPILE([
+#define _GNU_SOURCE 1
+#include <dlfcn.h>], [{
+    Dl_info info;
+    (void)dladdr("", &info);
+}], [ have_dladdr=yes ])
+AC_MSG_RESULT($have_dladdr)
+if test x"$have_dladdr" = xyes; then
+  AC_DEFINE([HAVE_DLADDR], 1, [Define to use 'dladdr' function.])
+fi
+
 # Check for AViiON Machines running DGUX
 ac_is_dgux=no
 AC_CHECK_HEADER(sys/dg_sys_info.h,