Re: [COMMITTERS] pgsql: Disable _FORTIFY_SOURCE with ICC

On 5 October 2012 04:37, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> A bit later: testing on an F17 box (glibc-2.15-56.fc17.x86_64)
> confirms Peter G's complaint, and also confirms that putting
> the above into port/linux.h (instead of the template file) fixes the
> problem.  Don't know how to disable it on ICC, but I suppose there's
> some way to test for ICC via an #if.

I was using F17 + glibc 2.15 too.

http://www.acsu.buffalo.edu/~charngda/icc.html indicates that ICC
defines a macro __ICC, which evaluates to an integer constant
representing the ICC version numbers. I guess that that particular
source isn't very trustworthy, but that's what we have a build farm
for.

Small patch that hopefully fixes everything for everyone is attached.
However, when I build at -O2 with the system GCC (on the same F17 box
with no changes to CFLAGS; just "./configure --with-libxml
--prefix=/home/peter/pgsql --enable-depend") this patch (when applied
to today's master) sees the following warnings raised:

zic.c: In function ‘writezone’:
zic.c:1752:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1753:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1754:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1755:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1756:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1757:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1758:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1759:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1760:3: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1772:4: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c:1785:4: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c: In function ‘puttzcode64’:
zic.c:1514:2: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
zic.c: In function ‘puttzcode’:
zic.c:1505:2: warning: ignoring return value of ‘fwrite’, declared
with attribute warn_unused_result [-Wunused-result]
In file included from gram.y:13502:0:
scan.c: In function ‘yy_try_NUL_trans’:
scan.c:16247:23: warning: unused variable ‘yyg’ [-Wunused-variable]

-- 
Peter Geoghegan       http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training and Services