From 2f8d396b9302eddcd8d552648e101a46b7a80acd Mon Sep 17 00:00:00 2001
From: Peter Tyser <ptyser@xes-inc.com>
Date: Fri, 13 Mar 2009 18:54:51 -0500
Subject: Add support for building native win32 tools

Add support for compiling the host tools in the tools directory using
the MinGW toolchain.  This produces executables which can be used on
standard Windows computers without requiring cygwin.

One must specify the MinGW compiler and strip utilities as if they
were the host toolchain in order to build win32 executables, eg:

make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
---
 tools/Makefile | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

(limited to 'tools/Makefile')

diff --git a/tools/Makefile b/tools/Makefile
index 9fe5b1a..122e5bb 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -46,12 +46,15 @@ else
 HOST_CFLAGS += -pedantic
 endif
 
+ifeq ($(HOSTOS),cygwin)
+HOST_CFLAGS += -ansi
+endif
+
 #
-# Cygwin needs .exe files :-(
+# toolchains targeting win32 generate .exe files
 #
-ifeq ($(HOSTOS),cygwin)
+ifneq (,$(findstring WIN32 ,$(shell $(HOSTCC) -E -dM -xc /dev/null)))
 SFX = .exe
-HOST_CFLAGS += -ansi
 else
 SFX =
 endif
@@ -90,6 +93,7 @@ OBJ_FILES-$(CONFIG_LCD_LOGO) += bmp_logo.o
 OBJ_FILES-$(CONFIG_VIDEO_LOGO) += bmp_logo.o
 OBJ_FILES-$(CONFIG_INCA_IP) += inca-swap-bytes.o
 OBJ_FILES-$(CONFIG_NETCONSOLE) += ncb.o
+OBJ_FILES-y += os_support.o
 
 # Don't build by default
 #ifeq ($(ARCH),ppc)
@@ -125,13 +129,15 @@ LIBFDT_OBJS	:= $(addprefix $(obj),$(LIBFDT_OBJ_FILES-y))
 
 #
 # Use native tools and options
+# Define __KERNEL_STRICT_NAMES to prevent typedef overlaps
 #
 CPPFLAGS   = -idirafter $(SRCTREE)/include \
 		-idirafter $(OBJTREE)/include2 \
 		-idirafter $(OBJTREE)/include \
 	        -I $(SRCTREE)/libfdt \
 		-I $(SRCTREE)/tools \
-		-DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC
+		-DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC \
+		-D__KERNEL_STRICT_NAMES
 CFLAGS     = $(HOST_CFLAGS) $(CPPFLAGS) -O
 
 # No -pedantic switch to avoid libfdt compilation warnings
@@ -147,7 +153,7 @@ all:	$(obj).depend $(BINS) $(LOGO-y) subdirs
 $(obj)envcrc$(SFX):	$(obj)envcrc.o $(obj)crc32.o $(obj)env_embedded.o $(obj)sha1.o
 	$(CC) $(CFLAGS) -o $@ $^
 
-$(obj)ubsha1$(SFX):	$(obj)ubsha1.o $(obj)sha1.o
+$(obj)ubsha1$(SFX):	$(obj)ubsha1.o $(obj)sha1.o $(obj)os_support.o
 	$(CC) $(CFLAGS) -o $@ $^
 
 $(obj)img2srec$(SFX):	$(obj)img2srec.o
@@ -155,7 +161,7 @@ $(obj)img2srec$(SFX):	$(obj)img2srec.o
 	$(STRIP) $@
 
 $(obj)mkimage$(SFX):	$(obj)mkimage.o $(obj)crc32.o $(obj)image.o $(obj)md5.o \
-			$(obj)sha1.o $(LIBFDT_OBJS)
+			$(obj)sha1.o $(LIBFDT_OBJS) $(obj)os_support.o
 	$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 	$(STRIP) $@
 
@@ -183,13 +189,16 @@ $(obj)bin2header$(SFX): $(obj)bin2header.o
 	$(CC) $(CFLAGS) $(HOST_LDFLAGS) -o $@ $^
 	$(STRIP) $@
 
-# image.c and mkimage.c require FIT_CFLAGS instead of standard CFLAGS
+# Some files complain if compiled with -pedantic, use FIT_CFLAGS
 $(obj)image.o: $(SRCTREE)/tools/image.c
 	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
 
 $(obj)mkimage.o: $(SRCTREE)/tools/mkimage.c
 	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
 
+$(obj)os_support.o: $(SRCTREE)/tools/os_support.c
+	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
+
 # Some of the tool objects need to be accessed from outside the tools directory
 $(obj)%.o: $(SRCTREE)/common/%.c
 	$(CC) -g $(FIT_CFLAGS) -c -o $@ $<
-- 
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