From: Alexander Traud <pabstraud@compuserve.com>
Date: Fri, 9 Mar 2018 08:44:23 +0000 (+0100)
Subject: BuildSystem: Enable dladdr on non-Linux platforms like FreeBSD.
X-Git-Tag: 13.21.0-rc1~54^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2274623708b72e7821f7c95c61adc9ce08ac932;p=thirdparty%2Fasterisk.git

BuildSystem: Enable dladdr on non-Linux platforms like FreeBSD.

ASTERISK-27641

Change-Id: I587e8ba0123c70fc10cfd8b0ac3299551f61d84b
---

diff --git a/configure b/configure
index 3442d57248..f86b41bb77 100755
--- a/configure
+++ b/configure
@@ -19129,6 +19129,41 @@ rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=${old_LIBS}
 
+# re-check without -ldl
+# Non-Linux platforms like FreeBSD and NetBSD do not need a library libdl.so.
+if test "${PBX_DLADDR}" = "0"; then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for dladdr in dlfcn.h without -ldl" >&5
+$as_echo_n "checking for dladdr in dlfcn.h without -ldl... " >&6; }
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#define _GNU_SOURCE 1
+#include <dlfcn.h>
+int
+main ()
+{
+dladdr((void *)0, (void *)0)
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		PBX_DLADDR=1
+
+
+$as_echo "#define HAVE_DLADDR 1" >>confdefs.h
+
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
 # PKGCONFIG is used in later tests
 
 
diff --git a/configure.ac b/configure.ac
index d9148c0191..a72022a6ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1405,6 +1405,23 @@ AC_LINK_IFELSE(
 )
 LIBS=${old_LIBS}
 
+# re-check without -ldl
+# Non-Linux platforms like FreeBSD and NetBSD do not need a library libdl.so.
+if test "${PBX_DLADDR}" = "0"; then
+	AC_MSG_CHECKING(for dladdr in dlfcn.h without -ldl)
+	AC_LINK_IFELSE(
+		[AC_LANG_PROGRAM([#define _GNU_SOURCE 1
+#include <dlfcn.h>],
+			[dladdr((void *)0, (void *)0)]
+		)],
+		AC_MSG_RESULT(yes)
+		PBX_DLADDR=1
+		AC_SUBST([PBX_DLADDR])
+		AC_DEFINE([HAVE_DLADDR], 1, [Define to 1 if your system has the dladdr() GNU extension]),
+		AC_MSG_RESULT(no)
+	)
+fi
+
 # PKGCONFIG is used in later tests
 PKG_PROG_PKG_CONFIG()