add initial CMake and Visual Studio build support

This moves the compatibility include files from include to
include/compat so we can use the awful MS C compiler
<../include/> trick to emulate the GNU #include_next extension.

This also removes a few old compat files we do not need anymore.

apps/CMakeLists.txt

@@ -0,0 +1,84 @@
+include_directories(
+	.
+	../include
+	../include/compat
+)
+
+set(
+	OPENSSL_SRC
+	apps.c
+	asn1pars.c
+	ca.c
+	ciphers.c
+	cms.c
+	crl.c
+	crl2p7.c
+	dgst.c
+	dh.c
+	dhparam.c
+	dsa.c
+	dsaparam.c
+	ec.c
+	ecparam.c
+	enc.c
+	engine.c
+	errstr.c
+	gendh.c
+	gendsa.c
+	genpkey.c
+	genrsa.c
+	nseq.c
+	ocsp.c
+	openssl.c
+	passwd.c
+	pkcs12.c
+	pkcs7.c
+	pkcs8.c
+	pkey.c
+	pkeyparam.c
+	pkeyutl.c
+	prime.c
+	rand.c
+	req.c
+	rsa.c
+	rsautl.c
+	s_cb.c
+	s_client.c
+	s_server.c
+	s_socket.c
+	s_time.c
+	sess_id.c
+	smime.c
+	speed.c
+	spkac.c
+	ts.c
+	verify.c
+	version.c
+	x509.c
+)
+
+if(CMAKE_HOST_UNIX)
+	set(OPENSSL_SRC ${OPENSSL_SRC} apps_posix.c)
+	set(OPENSSL_SRC ${OPENSSL_SRC} certhash.c)
+endif()
+
+if(CMAKE_HOST_WIN32)
+	set(OPENSSL_SRC ${OPENSSL_SRC} apps_win.c)
+	set(OPENSSL_SRC ${OPENSSL_SRC} certhash_disabled.c)
+	set(OPENSSL_SRC ${OPENSSL_SRC} poll_win.c)
+endif()
+
+check_function_exists(strtonum HAVE_STRTONUM)
+if(HAVE_STRTONUM)
+	add_definitions(-DHAVE_STRTONUM)
+else()
+	set(OPENSSL_SRC ${OPENSSL_SRC} strtonum.c)
+endif()
+
+set(OPENSSL_LIBS ssl crypto)
+if(CMAKE_HOST_WIN32)
+	set(OPENSSL_LIBS ${OPENSSL_LIBS} ws2_32)
+endif()
+
+add_executable(openssl ${OPENSSL_SRC})
+target_link_libraries(openssl ${OPENSSL_LIBS})

apps/Makefile.am

@@ -88,6 +88,7 @@ noinst_HEADERS += timeouts.h
 EXTRA_DIST = cert.pem
 EXTRA_DIST += openssl.cnf
 EXTRA_DIST += x509v3.cnf
+EXTRA_DIST += CMakeLists.txt
 
 install-exec-hook:
 	@if [ "@OPENSSLDIR@x" != "x" ]; then \