From 3ccaac365da6078a96681109efebc70dcb12fc55 Mon Sep 17 00:00:00 2001
From: Greg Troxel <gdt@lexort.com>
Date: Wed, 18 Mar 2020 19:01:52 -0400
Subject: [PATCH 1/2] Makefile.defs: On NetBSD, link with -lm

---
 src/Makefile.defs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Makefile.defs b/src/Makefile.defs
index a89a3a6099e..3d28f3ef385 100644
--- a/src/Makefile.defs
+++ b/src/Makefile.defs
@@ -2056,7 +2056,7 @@ ifeq ($(OS), netbsd)
 		C_DEFS+=-DHAVE_SELECT
 	endif
 	YACC=yacc
-	LIBS=
+	LIBS=-lm
 endif
 
 # OS X support, same as freebsd

From bca9768b6f2667bad8472fa99a113b8249ca0f9a Mon Sep 17 00:00:00 2001
From: Greg Troxel <gdt@lexort.com>
Date: Wed, 18 Mar 2020 19:03:08 -0400
Subject: [PATCH 2/2] Makefile.defs: Only add -ldl on systems that use it

kamailio uses dlopen, and on some systems, one must link with -ldl.
On others, this is not needed and there is no libdl.  For now, simply
omit -ldl on NetBSD (which doesn't have or require it), and don't try
to change behavior on other systems.
---
 src/Makefile.defs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/Makefile.defs b/src/Makefile.defs
index 3d28f3ef385..f6f39e3a01f 100644
--- a/src/Makefile.defs
+++ b/src/Makefile.defs
@@ -210,9 +210,18 @@ endif
 
 endif
 
+# dlopen requires -ldl on some systems, but not others.  Until there
+# is clarity on which require -ldl, add just enough ifeq to fix
+# systems known not to use it.
+ifeq ($(OS), netbsd)
+LIBDL=""
+else
+LIBDL="-ldl"
+endif
+
 ifeq ($(LIBSSL_SET_MUTEX_SHARED), 1)
 CC_PMUTEX_OPTS = -pthread -DKSR_PTHREAD_MUTEX_SHARED
-LD_PMUTEX_OPTS = -pthread -rdynamic -ldl -Wl,-Bsymbolic-functions
+LD_PMUTEX_OPTS = -pthread -rdynamic $(LIBDL) -Wl,-Bsymbolic-functions
 else
 CC_PMUTEX_OPTS =
 LD_PMUTEX_OPTS =