Re: Results of a test mass rebuild of rawhide/x86_64 with gcc-5.0.0-0.5.fc22

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On 02/10/2015 06:22 AM, Marek Polacek wrote:
On Mon, Feb 09, 2015 at 02:43:25PM -0700, Jerry James wrote:
On Sun, Feb 8, 2015 at 10:17 AM, Marek Polacek <polacek@xxxxxxxxxx> wrote:
bigloo-4.1a-6.2.fc22.src.rpm
memstomp-0.1.4-15.fc22.src.rpm
         build failure due to gnu11 change: -Wimplicit-int is turned on by default now,
         which is the reason these packages didn't compile properly.  See the porting_to
         document for more details.

The bigloo failure had nothing to do with -Wimplicit-int.  One file
that should have been compiled with -fPIC wasn't.  I don't know why
this didn't cause problems before.  Fixed in Rawhide.

IIRC bigloo contains various "autoconf" shell scripts with K&R code in
them (that fail with -Werror now)

Remove these -Werrors and tell upstream to not use -Werror.
-Werror turns harmless warnings into errors.

As autoconf scripts are based on compilers issuing errors only on real errors and not on otherwise harmless warnings, -Werror is not useful with autoconf scripts and is _guaranteed_ to break autoconf scripts, because the items GCC warns about are changing with each GCC-release and also depend on other factors (CFLAGS) in effect.

Ralf

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