Re: [sr #110451] autoconf 2.71 generated configure file does not enable C compiler flag for C99 on Solaris 10

[Zack Weinberg]

On Sat, Feb 27, 2021 at 3:05 PM Bruno Haible <INVALID.NOREPLY@gnu.org> wrote:

> Find attached two tarballs, hello-c-2.69.tar.gz (generated with autoconf 2.69)
> and hello-c-2.71.tar.gz (generated with autoconf 2.71). They contain the same
> source code, except for the version number in configure.ac. In particular,
> they contain
>   - in configure.ac, an AC_PROG_CC_C99 invocation,
>   - in hello.c: code that requires C99.

FYI, AC_PROG_CC_C99 is supposed to be unnecessary with 2.70 and later.

> On Solaris 10, I'm using CC="cc -O". This compiler is not C99 compliant, but
> it accepts the option '-xc99' which makes it C99 compliant.
>
> Both packages ought to exhibit the same behaviour, but they don't:

Savannah seems to be down at the moment, so I can't download your test
tarballs.  Could you please reply to this message and attach the
config.log files you get from both?  (I was going to ask for this
anyway since I may not have access to exactly the same incarnation of
Sun's compiler as you do.)

zw