From 098efbc6e35d1672cae7150f5f081149226b8341 Mon Sep 17 00:00:00 2001
From: Justin Schneck <jschneck@mac.com>
Date: Wed, 30 Nov 2016 20:49:48 -0500
Subject: [PATCH] support cross compiling

---
 .gitignore |  1 +
 Makefile   | 18 +++++++++++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index e11e9ad..ad715ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /priv
 erl_crash.dump
 *.ez
+/src/*.o
diff --git a/Makefile b/Makefile
index b407c4c..3108d92 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,8 @@
+SRC=$(wildcard src/*.c)
+
+CFLAGS += -std=c99 -D_GNU_SOURCE
+CC ?= $(CROSSCOMPILER)gcc
+
 UNAME := $(shell uname)
 
 ifeq ($(UNAME),MSYS_NT-6.1)
@@ -8,11 +13,18 @@ else
 	SOURCES = src/baud-posix.c src/baud.c src/util.c src/loop.c
 endif
 
+OBJ=$(SOURCES:.c=.o)
+
+.PHONY: all clean
+
 all: $(TARGET)
 
-$(TARGET): src/*
+%.o: %.c
+	$(CC) -c $(CFLAGS) -o $@ $<
+
+$(TARGET): $(OBJ)
 	mkdir -p priv/native
-	gcc -o $(TARGET) $(SOURCES)
+	$(CC) $^ -o $@
 
 clean:
-	rm -f priv/native/*
+	rm -f priv/native/* src/*.o