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Infer TOOLPREFIX, just like in JOS

This commit is contained in:
Austin Clements 2010-08-31 15:01:26 -04:00
parent 7d7dc9331b
commit 0f0456ec53
1 changed files with 17 additions and 1 deletions
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18
Makefile
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@ -28,11 +28,27 @@ OBJS = \
vm.o\
# Cross-compiling (e.g., on Mac OS X)
TOOLPREFIX = i386-jos-elf-
#TOOLPREFIX = i386-jos-elf-
# Using native tools (e.g., on X86 Linux)
#TOOLPREFIX =
# Try to infer the correct TOOLPREFIX if not set
ifndef TOOLPREFIX
TOOLPREFIX := $(shell if i386-jos-elf-objdump -i 2>&1 | grep '^elf32-i386$$' >/dev/null 2>&1; \
then echo 'i386-jos-elf-'; \
elif objdump -i 2>&1 | grep 'elf32-i386' >/dev/null 2>&1; \
then echo ''; \
else echo "***" 1>&2; \
echo "*** Error: Couldn't find an i386-*-elf version of GCC/binutils." 1>&2; \
echo "*** Is the directory with i386-jos-elf-gcc in your PATH?" 1>&2; \
echo "*** If your i386-*-elf toolchain is installed with a command" 1>&2; \
echo "*** prefix other than 'i386-jos-elf-', set your TOOLPREFIX" 1>&2; \
echo "*** environment variable to that prefix and run 'make' again." 1>&2; \
echo "*** To turn off this error, run 'gmake TOOLPREFIX= ...'." 1>&2; \
echo "***" 1>&2; exit 1; fi)
endif
CC = $(TOOLPREFIX)gcc
AS = $(TOOLPREFIX)gas
LD = $(TOOLPREFIX)ld