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Date: Mon, 19 Jan 2015 01:28:00 -0500
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: "checking whether compiler is gcc... no" on a non-English
locale
On Mon, Jan 19, 2015 at 02:20:10PM +0800, Vadim Ushakov wrote:
> Hello,
>
> musl's ./configure fails to properly detect gcc compiler when running
> on a non-English locale.
>
> Output of gcc -v is localized. For example:
>
> $ env LC_ALL=C gcc -v |& tail -1
> gcc version 4.9.2 20141224 (prerelease) (GCC)
> $ env LC_ALL=ru_RU.utf8 gcc -v |& tail -1
> gcc версия 4.9.2 20141224 (prerelease) (GCC)
> $ env LC_ALL=fi_FI.utf8 gcc -v |& tail -1
> gcc-versio 4.9.2 20141224 (prerelease) (GCC)
Interesting. Thanks for bringing this to our attention.
> Since ./configure attempts to detect gcc by fnmatch-ing output of gcc
> -v against the pattern '*gcc\ version*', it fails.
>
> Possible fix:
>
> diff --git a/configure b/configure
> index 673d291..e23a269 100755
> --- a/configure
> +++ b/configure
> @@ -204,7 +204,7 @@ fi
> # musl-gcc wrapper, and for critical bug detection in some gcc versions.
> #
> printf "checking whether compiler is gcc... "
> -if fnmatch '*gcc\ version*' "$($CC -v 2>&1)" ; then
> +if fnmatch '*gcc\ version*' "$(env LC_ALL=C $CC -v 2>&1)" ; then
Yes, something like that should work. I generally don't like using
LC_ALL (rather overriding just the category needed), but since LC_ALL
may already be set, and since the correct LC_CTYPE, etc. aren't needed
for this test anyway, I think it's probably acceptable.
Rich
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