Re: [PATCH 04/12] Makefile: introduce CROSS_COMPILE variable

From: Jonathan Nieder <jrnieder@gmail.com>
Date: Apr 28, 2014, 16:25 UTC
Message-ID: <20140428162536.GB13002@google.com>
In-Reply-To: <1398693097-24651-5-git-send-email-marat@slonopotamus.org>

Hi,

Marat Radchenko wrote:

> +# Define CROSS_COMPILE to specify the prefix used for all executables used
> +# during compilation. Only gcc and related bin-utils executables
> +# are prefixed with $(CROSS_COMPILE).

Please include an example.

	# Define CROSS_COMPILE=foo- if your compiler and binary utilities
	# are foo-cc, foo-ar, foo-strip, etc.  More specific variables
	# override this, so if you set CC=gcc CROSS_COMPILE=ia64-linux-gnu-
	# then the compiler will be 'gcc', not 'ia64-linux-gnu-gcc'.

Otherwise unless I happen to know the convention from other packages I would not know whether to include a trailing '-' in CROSS_COMPILE, etc.

Does the effect of this setting depend on whether CC=gcc (i.e., is the Makefile checking the value of CC and ignoring CROSS_COMPILE when it is e.g. the Intel compiler)?

[...]

> -STRIP ?= strip
> +STRIP = $(CROSS_COMPILE)strip

Before, STRIP from the environment took precedence over STRIP from the makefile. Switching to the more usual 'environment can't be trusted' convention is a good change, but please mention it in the commit message.

The rest looks good from a quick look.

Thanks, Jonathan