From 24109550cda5a4deaad6ec35be93e6270b9a2c29 Mon Sep 17 00:00:00 2001
From: Justin Ethier <justin.ethier@gmail.com>
Date: Fri, 26 Aug 2016 03:04:39 -0400
Subject: [PATCH] Autodetect configuration items

---
 Makefile.config | 47 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 44 insertions(+), 3 deletions(-)

diff --git a/Makefile.config b/Makefile.config
index d57c7a83..0440b892 100644
--- a/Makefile.config
+++ b/Makefile.config
@@ -4,9 +4,6 @@
 #
 # Configuration options for the makefile
 
-# Platform-specific flags, set to 0 if not supported
-CYC_PLATFORM_HAS_MEMSTREAM ?= 1
-
 # Compiler options
 CFLAGS       ?= -O2 -Wall -Iinclude -L.
 COMP_CFLAGS  ?= -O2 -Wall -I$(PREFIX)/include -L$(PREFIX)/lib
@@ -38,3 +35,47 @@ INCDIR    ?= $(PREFIX)/include/cyclone
 DATADIR   ?= $(PREFIX)/share/cyclone
 
 DESTDIR   ?=
+
+# Automatically detect platform-specific flags, instead of using autoconf
+#CYC_PLATFORM_HAS_MEMSTREAM ?= 1
+CYC_PLATFORM_HAS_MEMSTREAM := $(shell echo "main(){char *buf; int len; open_memstream(&buf, &len);}" | gcc -xc - >/dev/null 2>/dev/null && echo 1 || echo 0)
+
+# code from chibi's makefile to detect platform
+ifndef PLATFORM
+ifeq ($(shell uname),Darwin)
+PLATFORM=macosx
+else
+ifeq ($(shell uname),FreeBSD)
+PLATFORM=bsd
+else
+ifeq ($(shell uname),NetBSD)
+PLATFORM=bsd
+else
+ifeq ($(shell uname),OpenBSD)
+PLATFORM=bsd
+else
+ifeq ($(shell uname),DragonFly)
+PLATFORM=bsd
+else
+ifeq ($(shell uname -o),Msys)
+PLATFORM=mingw
+SOLIBDIR = $(BINDIR)
+DIFFOPTS = -b
+else
+ifeq ($(shell uname -o),Cygwin)
+PLATFORM=cygwin
+SOLIBDIR = $(BINDIR)
+DIFFOPTS = -b
+else
+ifeq ($(shell uname -o),GNU/Linux)
+PLATFORM=linux
+else
+PLATFORM=unix
+endif
+endif
+endif
+endif
+endif
+endif
+endif
+endif