[Buildroot] [PATCHv2 4/4] toolchain: instrument external toolchain wrapper

Peter Korsgaard jacmet at uclibc.org
Fri Jul 19 06:33:26 UTC 2013

>>>>> "Yann" == Yann E MORIN <yann.morin.1998 at free.fr> writes:

 Yann> From: "Yann E. MORIN" <yann.morin.1998 at free.fr>
 Yann> If BR_DEBUG_WRAPPER is set in the envirnment, dump the actual command
 Yann> being exec()uted, to ease debugging issues with the wrapper.

 Yann> Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
 Yann> Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>

 Yann> ---
 Yann> Changes v1 -> v2:
 Yann>   - style fixes (Thomas)
 Yann> ---
 Yann>  toolchain/toolchain-external/ext-toolchain-wrapper.c | 8 ++++++++
 Yann>  1 file changed, 8 insertions(+)

 Yann> diff --git a/toolchain/toolchain-external/ext-toolchain-wrapper.c b/toolchain/toolchain-external/ext-toolchain-wrapper.c
 Yann> index 460f255..8e56414 100644
 Yann> --- a/toolchain/toolchain-external/ext-toolchain-wrapper.c
 Yann> +++ b/toolchain/toolchain-external/ext-toolchain-wrapper.c
 Yann> @@ -136,6 +136,14 @@ int main(int argc, char **argv)
 Yann>  	/* finish with NULL termination */
 Yann>  	*cur = NULL;
 Yann> +	if( getenv("BR_DEBUG_WRAPPER") ) {
 Yann> +		fprintf( stderr, "path='%s'\n", path );
 Yann> +		int i;
 Yann> +		for( i=0; args[i]; i++ ) {
 Yann> +			fprintf(stderr, "argv[%d]='%s'\n", i, args[i] );
 Yann> +		}
 Yann> +	}
 Yann> +

That's still not really the code style used elsewhere in this file.

You could argue that this feature isn't really needed as you can just
run 'strace -s 1000 -e execve <wrapper>' for basically the same
information, but OK - This is perhaps a bit more user friendly.

With that in mind, I think a more sensible output format is something
you can directly cut'n'paste and execute in the shell (after perhaps
tweaking something), so I've changed it to simply print the args space
seperated like this:

BR_DEBUG_WRAPPER=1 ./output/host/usr/bin/arm-none-linux-gnueabi-gcc --version
Executing /home/peko/source/buildroot/output/host/opt/ext-toolchain/bin/arm-none-linux-gnueabi-gcc --sysroot /home/peko/source/buildroot/output/host/usr/arm-buildroot-linux-gnueabi/sysroot -march=armv5te -mtune=arm926ej-s -mabi=aapcs-linux -mfloat-abi=soft -msoft-float -marm -pipe --version
arm-none-linux-gnueabi-gcc (Sourcery CodeBench Lite 2013.05-24) 4.7.3
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO

Committed with these changes, thanks.

Bye, Peter Korsgaard

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