[U-Boot] [RFC PATCH] ARM: print gcc version

[Alexander Holler <holler@ahsoftware.de>]

Am 18.01.2011 17:20, schrieb Peter Tyser:
>>>> Anyway, I would found it a nice feature, at startup or when running the
>>>> version command, but both aren't a must.
>>>
>>> I think it would be a really useful extension to the version command.
>>> Looking forwad to seeing your patch.
>>
>> Maybe if someone could feed me with what to use for the version. E.g. my
>> gcc here defines __VERSION__ as "4.5.2" but when I'm looking at
>> u-boot/lib/asm-offsets.s I see
>>
>> .ident  "GCC: (Gentoo 4.5.2 p1.0, pie-0.4.5) 4.5.2"
>>
>> So I would like to display that which would be in line with the comment
>> section of generated binaries.
>>
>> But when I use "gcc -E -dM empty.c" to print all predefined macros, I
>> don't see the text found in .ident. Not even something else which
>> includes "Gentoo".
>
> I believe the output of "$(CC) --version" should contain the same data
> as your .ident string.  You could echo it into a file like:
> diff --git a/Makefile b/Makefile
> index 0685ef9..e070d40 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -416,6 +416,8 @@ $(U_BOOT_ONENAND):  $(ONENAND_IPL) $(obj)u-boot.bin
>   $(VERSION_FILE):
>                  @( printf '#define U_BOOT_VERSION "U-Boot %s%s"\n' "$(U_BOOT_VERSION)" \
>                   '$(shell $(TOPDIR)/tools/setlocalversion $(TOPDIR))' )>  $@.tmp
> +               @( printf '#define CC_VERSION_STRING "%s"\n' \
> +                '$(shell $(CC) --version | head -1)' )>>  $@.tmp
>                  @cmp -s $@ $@.tmp&&  rm -f $@.tmp || mv -f $@.tmp $@
>
>   $(TIMESTAMP_FILE):

That would the trick. The first line of gcc --version includes here the 
correct string. Thanks. (Btw. I would use head -n 1)

But I will wait for a comment from one of the maintainers about defining 
CC_VERSION_STRING.

If someone gives me an ok, I will write a patch including your 
suggestion and will print that version in the command version.

Regards,

Alexander