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| author | Sam Ravnborg <sam@mars.ravnborg.org> | 2003-06-04 03:27:23 +0200 |
|---|---|---|
| committer | Sam Ravnborg <sam@mars.ravnborg.org> | 2003-06-04 03:27:23 +0200 |
| commit | b830d7973c0de3c9b4381b740aeed53cb9875070 (patch) | |
| tree | 4056d3345271d9028a70642c687b3eed732d4af3 /Makefile | |
| parent | 9f115a3b66b54aaf3df8e81b7c17c8a2389e3c63 (diff) | |
| download | history-b830d7973c0de3c9b4381b740aeed53cb9875070.tar.gz | |
kbuild: CROSS_COMPILE and ARCH definitions
Patch originally by Jesse Barnes <jbarnes@sgi.com>
Previously the user were required to supply CROSS_COMPILE and ARCH on the
commandline to make, alternatively they patched the Makefile direct.
The following patch allows the user to specify the value of these in
a variable assigned during init or similar.
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/Makefile b/Makefile index ab0a15e92b6d1..5932e5ffe0c8f 100644 --- a/Makefile +++ b/Makefile @@ -36,13 +36,36 @@ KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ -e s/arm.*/arm/ -e s/sa110/arm/ \ -e s/s390x/s390/ ) -ARCH := $(SUBARCH) # Remove hyphens since they have special meaning in RPM filenames KERNELPATH=kernel-$(subst -,,$(KERNELRELEASE)) +# Cross compiling and selecting different set of gcc/bin-utils +# --------------------------------------------------------------------------- +# +# When performing cross compilation for other architectures ARCH shall be set +# to the target architecture. (See arch/* for the possibilities). +# ARCH can be set during invocation of make: +# make ARCH=ia64 +# Another way is to have ARCH set in the environment. +# The default ARCH is the host where make is executed. + +# CROSS_COMPILE specify the prefix used for all executables used +# during compilation. Only gcc and related bin-utils executables +# are prefixed with $(CROSS_COMPILE). +# CROSS_COMPILE can be set on the command line +# make CROSS_COMPILE=ia64-linux- +# Alternatively CROSS_COMPILE can be set in the environment. +# Default value for CROSS_COMPILE is not to prefix executables +# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile + +ARCH ?= $(SUBARCH) +CROSS_COMPILE ?= + +# Architecture as present in compile.h UTS_MACHINE := $(ARCH) +# SHELL used by kbuild CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ else if [ -x /bin/bash ]; then echo /bin/bash; \ else echo sh; fi ; fi) @@ -53,7 +76,6 @@ HOSTCXX = g++ HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer HOSTCXXFLAGS = -O2 -CROSS_COMPILE = # That's our default target when none is given on the command line # Note that 'modules' will be added as a prerequisite as well, |