[Buildroot] [PATCH 3/9] toolchain-external: add support for gcc version dependency
Jörg Krause
joerg.krause at embedded.rocks
Sat Aug 8 12:23:04 UTC 2015
Dear Thomas Petazzoni, Yann Y. Marin,
On Mi, 2015-08-05 at 12:14 +0200, Thomas Petazzoni wrote:
> Dear Yann E. MORIN,
>
> On Tue, 4 Aug 2015 21:49:48 +0200, Yann E. MORIN wrote:
>
> > That's not true for the BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64
> > toolchain:
> >
> > $ ./host/opt/ext-toolchain/bin/aarch64-linux-gnu-gcc --version
> > aarch64-linux-gnu-gcc (crosstool-NG linaro-1.13.1-4.9-2014.09 -
> > Linaro GCC 4.9-2014.09) 4.9.2 20140904 (prerelease)
> >
> > Here's a better sed-expr that should match it too, as well as the
> > other
> > gcc versions; we'll make the assumption that the version string is
> > right
> > after the first closing parenthesis:
> >
> > sed -r -e '1!d; s/^[^)]+\) ([^[:space:]]+).*/\1/;
> > s/\.[[:digit:]]+$//;'
> >
> > Explanations;
> >
> > - 1!d
> > - delete if not line 1 (i.e. your 'head -n1')
> >
> > - s/^[^)]+\) ([^[:space:]]+).*/\1/
> > - eat all until the first ')' character followed by a space
> > - match as many non-space chars as possible
> > - eat all the remaining chars on the line
> > - replace by the matched expression
> >
> > - s/\.[[:digit:]]+$//
> > - eat a dot followed by as many digits as possible up to the
> > end
> > of line
> > - replace with nothing
>
> Thanks! I've used your regexp, and also copy/pasted your explanation
> into the code. I just had to replace $ by $$ to cope with make
> escaping.
This regex does not produce the version string 5 for my GCC 5.2
toolchain built with BR and included as external toolchain.
$ output/host/usr/bin/arm-linux-gcc --version
arm-linux-gcc (Buildroot 2015.08-rc1-01365-gec8cd42) 5.2.0
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There
is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.
$ output/host/usr/bin/arm-linux-gcc --version | sed -r -e '1!d;
s/^[^)]+\) ([^[:space:]]+).*/\1/; s/\.[[:digit:]]+$$//;'
5.2
Best regards
Jörg Krause
More information about the buildroot
mailing list