--- /dev/null
+From 8e1dadbcb7ec6be1c568550e97a9e3ce565758bf Mon Sep 17 00:00:00 2001
+From: Nirbheek Chauhan <nirbheek@centricular.com>
+Date: Wed, 5 Nov 2014 18:35:14 +0530
+Subject: [PATCH] Add support for building on/cross-compiling the shared
+ library for Windows and OS X
+
+Also ensure that the shared library is versioned, and an implib is created on
+Windows.
+
+Commit backported from upstream.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ Makefile.in | 53 ++++++++++++++++++++++++++++++++++++++++-------------
+ 1 file changed, 40 insertions(+), 13 deletions(-)
+
+diff --git a/Makefile.in b/Makefile.in
+index 5a7fc21..5ca4453 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -17,7 +17,7 @@
+ USE_OPENSSL = @USE_OPENSSL@
+ HAVE_PKG_CONFIG = @HAVE_PKG_CONFIG@
+
+-.PHONY: all test build_table_apps
++.PHONY: all shared_library test build_table_apps
+
+ all: test
+
+@@ -43,10 +43,10 @@ endif
+ CC = @CC@
+ INCDIR = -Icrypto/include -I$(srcdir)/include -I$(srcdir)/crypto/include
+ DEFS = @DEFS@
+-CPPFLAGS= @CPPFLAGS@
++CPPFLAGS= -fPIC @CPPFLAGS@
+ CFLAGS = @CFLAGS@
+ LIBS = @LIBS@
+-LDFLAGS = @LDFLAGS@ -L.
++LDFLAGS = -L. @LDFLAGS@
+ COMPILE = $(CC) $(DEFS) $(INCDIR) $(CPPFLAGS) $(CFLAGS)
+ SRTPLIB = -lsrtp
+
+@@ -75,12 +75,33 @@ prefix = @prefix@
+ exec_prefix = @exec_prefix@
+ includedir = @includedir@
+ libdir = @libdir@
++bindir = @bindir@
+
+ ifeq (1, $(HAVE_PKG_CONFIG))
+ pkgconfigdir = $(libdir)/pkgconfig
+ pkgconfig_DATA = libsrtp.pc
+ endif
+
++SHAREDLIBVERSION = 1
++ifeq (linux,$(findstring linux,@host@))
++SHAREDLIB_DIR = $(libdir)
++SHAREDLIB_LDFLAGS = -shared -Wl,-soname,$@
++SHAREDLIBSUFFIXNOVER = so
++SHAREDLIBSUFFIX = $(SHAREDLIBSUFFIXNOVER).$(SHAREDLIBVERSION)
++else ifeq (mingw,$(findstring mingw,@host@))
++SHAREDLIB_DIR = $(bindir)
++SHAREDLIB_LDFLAGS = -shared -Wl,--out-implib,libsrtp.dll.a
++SHAREDLIBVERSION =
++SHAREDLIBSUFFIXNOVER = dll
++SHAREDLIBSUFFIX = $(SHAREDLIBSUFFIXNOVER)
++else ifeq (darwin,$(findstring darwin,@host@))
++SHAREDLIB_DIR = $(libdir)
++SHAREDLIB_LDFLAGS = -dynamiclib -twolevel_namespace -undefined dynamic_lookup \
++ -fno-common -headerpad_max_install_names -install_name $(libdir)/$@
++SHAREDLIBSUFFIXNOVER = dylib
++SHAREDLIBSUFFIX = $(SHAREDLIBVERSION).$(SHAREDLIBSUFFIXNOVER)
++endif
++
+ # implicit rules for object files and test apps
+
+ %.o: %.c
+@@ -121,9 +142,14 @@ libsrtp.a: $(srtpobj) $(cryptobj) $(gdoi)
+ ar cr libsrtp.a $^
+ $(RANLIB) libsrtp.a
+
+-libsrtp.so: $(srtpobj) $(cryptobj) $(gdoi)
+- $(CC) -shared -Wl,-soname,libsrtp.so \
+- -o libsrtp.so $^ $(LDFLAGS)
++libsrtp.$(SHAREDLIBSUFFIX): $(srtpobj) $(cryptobj) $(gdoi)
++ $(CC) -shared -o $@ $(SHAREDLIB_LDFLAGS) \
++ $^ $(LDFLAGS) $(LIBS)
++ if [ -n "$(SHAREDLIBVERSION)" ]; then \
++ ln -sfn $@ libsrtp.$(SHAREDLIBSUFFIXNOVER); \
++ fi
++
++shared_library: libsrtp.$(SHAREDLIBSUFFIX)
+
+ # libcryptomath.a contains general-purpose routines that are used to
+ # generate tables and verify cryptoalgorithm implementations - this
+@@ -212,16 +238,18 @@ libsrtpdoc:
+ .PHONY: clean superclean distclean install
+
+ install:
+- @if [ -r $(DESTDIR)$(includedir)/srtp/srtp.h ]; then \
+- echo "you should run 'make uninstall' first"; exit 1; \
+- fi
+ $(INSTALL) -d $(DESTDIR)$(includedir)/srtp
+ $(INSTALL) -d $(DESTDIR)$(libdir)
++ $(INSTALL) -d $(DESTDIR)$(bindir)
+ cp $(srcdir)/include/*.h $(DESTDIR)$(includedir)/srtp
+ cp $(srcdir)/crypto/include/*.h $(DESTDIR)$(includedir)/srtp
+ if [ "$(srcdir)" != "." ]; then cp crypto/include/*.h $(DESTDIR)$(includedir)/srtp; fi
+ if [ -f libsrtp.a ]; then cp libsrtp.a $(DESTDIR)$(libdir)/; fi
+- if [ -f libsrtp.so ]; then cp libsrtp.so $(DESTDIR)$(libdir)/; fi
++ if [ -f libsrtp.dll.a ]; then cp libsrtp.dll.a $(DESTDIR)$(libdir)/; fi
++ if [ -f libsrtp.$(SHAREDLIBSUFFIX) ]; then \
++ cp libsrtp.$(SHAREDLIBSUFFIX) $(DESTDIR)$(SHAREDLIB_DIR)/; \
++ cp libsrtp.$(SHAREDLIBSUFFIXNOVER) $(DESTDIR)$(SHAREDLIB_DIR)/; \
++ fi
+ if [ "$(pkgconfig_DATA)" != "" ]; then \
+ $(INSTALL) -d $(DESTDIR)$(pkgconfigdir); \
+ cp $(srcdir)/$(pkgconfig_DATA) $(DESTDIR)$(pkgconfigdir)/; \
+@@ -229,8 +257,7 @@ install:
+
+ uninstall:
+ rm -f $(DESTDIR)$(includedir)/srtp/*.h
+- rm -f $(DESTDIR)$(libdir)/libsrtp.a
+- rm -f $(DESTDIR)$(libdir)/libsrtp.so
++ rm -f $(DESTDIR)$(libdir)/libsrtp.*
+ -rmdir $(DESTDIR)$(includedir)/srtp
+ if [ "$(pkgconfig_DATA)" != "" ]; then \
+ rm -f $(DESTDIR)$(pkgconfigdir)/$(pkgconfig_DATA); \
+@@ -238,7 +265,7 @@ uninstall:
+
+ clean:
+ rm -rf $(cryptobj) $(srtpobj) $(cryptomath) TAGS \
+- libcryptomath.a libsrtp.a libsrtp.so core *.core test/core
++ libcryptomath.a libsrtp.* core *.core test/core
+ for a in * */* */*/*; do \
+ if [ -f "$$a~" ] ; then rm -f $$a~; fi; \
+ done;
+--
+2.1.0
+