[Asterisk-code-review] BuildSystem: Enable dladdr on non-Linux platforms like FreeBSD. (asterisk[master])

[Alexander Traud]

Alexander Traud has uploaded this change for review. ( https://gerrit.asterisk.org/8489


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

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

ASTERISK-27641

Change-Id: I587e8ba0123c70fc10cfd8b0ac3299551f61d84b
---
M configure
M configure.ac
2 files changed, 52 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/89/8489/1

diff --git a/configure b/configure
index 18609ca..7704c89 100755
--- a/configure
+++ b/configure
@@ -19444,6 +19444,41 @@
     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 a59646c..c35fbce 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1449,6 +1449,23 @@
 )
 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()
 

-- 
To view, visit https://gerrit.asterisk.org/8489
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Gerrit-Project: asterisk
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I587e8ba0123c70fc10cfd8b0ac3299551f61d84b
Gerrit-Change-Number: 8489
Gerrit-PatchSet: 1
Gerrit-Owner: Alexander Traud <pabstraud at compuserve.com>
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