From 3f4d143eb171afe9e62690c8965c9eb4b838a0eb Mon Sep 17 00:00:00 2001
From: Tim Lunn <tim@feathertop.org>
Date: Sat, 31 Mar 2018 13:55:02 +1100
Subject: Fix build failure on Ubuntu/Debian

This fixes unresolved symbols when linking with --as-needed

Closes #238
---
 Makefile.am  | 3 ++-
 configure.ac | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index dcc15e53..94845600 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -172,7 +172,8 @@ librsvg_@RSVG_API_MAJOR_VERSION@_la_LDFLAGS = \
 librsvg_@RSVG_API_MAJOR_VERSION@_la_LIBADD = \
 	$(LIBRSVG_LIBS) 	\
 	$(LIBM)			\
-	$(RUST_LIB)
+	$(RUST_LIB)		\
+	$(DLOPEN_LIBS)
 
 librsvgincdir = $(includedir)/librsvg-$(RSVG_API_VERSION)/librsvg
 librsvginc_HEADERS =			\
diff --git a/configure.ac b/configure.ac
index 63b10627..c9666757 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,6 +67,11 @@ PKG_PROG_PKG_CONFIG
 LT_INIT([win32-dll])
 LT_LIB_M
 
+# Check if -ldl is needed to use dlopen()
+AC_CHECK_FUNC(dlopen, [],
+              [AC_CHECK_LIB(dl, dlopen, [DLOPEN_LIBS=-ldl])])
+AC_SUBST(DLOPEN_LIBS)
+
 dnl ===========================================================================
 
 AC_CHECK_PROG(CARGO, [cargo], [yes], [no])
-- 
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