From 70523b5014574f15b4edbd78243b6004525f3839 Mon Sep 17 00:00:00 2001
From: Guy Harris <guy@alum.mit.edu>
Date: Mon, 12 Aug 2013 09:09:32 +0000
Subject: On some platforms, to get dladdr() you need to link with -ldl.  First
 try it without -ldl (in case the OS doesn't have it - not a good idea, as it
 complicates the build process for cross-platform tools that might require it
 on other platforms, but "not a good idea" never stopped UN*X vendors in the
 past) and, if that fails, try it with -ldl.

svn path=/trunk/; revision=51309
---
 acinclude.m4 | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'acinclude.m4')

diff --git a/acinclude.m4 b/acinclude.m4
index 687b25d3aa..e825dc1e93 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -637,6 +637,42 @@ AC_DEFUN([AC_WIRESHARK_PCAP_REMOTE_CHECK],
     LIBS="$ac_save_LIBS"
 ])
 
+#
+# AC_WIRESHARK_CHECK_DLADDR
+#
+AC_DEFUN([AC_WIRESHARK_CHECK_DLADDR],
+[
+	ac_save_CFLAGS="$CFLAGS"
+	ac_save_LIBS="$LIBS"
+	CFLAGS="$CFLAGS $GLIB_CFLAGS"
+	LIBS="$GLIB_LIBS $LIBS $1"
+	AC_TRY_RUN(
+[
+#define _GNU_SOURCE	/* required on Linux, sigh */
+#include <dlfcn.h>
+
+int
+main(void)
+{
+	Dl_info info;
+
+	if (!dladdr((void *)main, &info))
+		return 1;	/* failure */
+	return 0;		/* assume success */
+}
+],
+   ac_cv_dladdr_finds_executable_path=yes,
+   ac_cv_dladdr_finds_executable_path=no,
+   [echo $ac_n "cross compiling; assumed OK... $ac_c"
+    ac_cv_dladdr_finds_executable_path=yes])
+	CFLAGS="$ac_save_CFLAGS"
+	LIBS="$ac_save_LIBS"
+	if test x$ac_cv_dladdr_finds_executable_path = xyes
+	then
+		AC_DEFINE(DLADDR_FINDS_EXECUTABLE_PATH, 1, [Define if dladdr can be used to find the path of the executable])
+	fi
+])
+
 #
 # AC_WIRESHARK_ZLIB_CHECK
 #
-- 
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