[stunnel-users] Compilation issues - AIX 6.1 XLC and GXLC

Mon Nov 16 22:52:05 CET 2015

Mike,

I tried with IBM's XLC 13.1.2 and these options were ignored:
-Wall -Wpedantic -Wformat=2 -Wconversion -Wno-long-long
-Wno-depreciated-declarations

I compiled it as follows:
cd ~/SRC; rm -rf stunnel-5.27; gzip -dc stunnel-5.27b3.tar.gz | tar xvf -;
cd stunnel-5.27
export CFLAGS="-qstackprotect=size=0"
./configure --enable-fips --disable-ipv6 --with-threads=pthread
--with-ssl=/usr
make

I didn't have to use "gxlc" (IBM's "gcc clone"), and other than the
warnings for the unrecognized parameters above, it seems to work. I added
the extra CFLAGS parameter to ensure stack smashing protection is enabled
(disabled by default on XLC).

I can see how it would be nearly impossible to maintain compatibility with
compilers from different architectures and different versions with
different arguments. Thanks for the patch!

Regards,
 -Rob

On Fri, Nov 13, 2015 at 6:41 AM, Michal Trojnara <Michal.Trojnara at mirt.net>
wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> On 13.11.2015 11:46, Dagobert Michelsen wrote:
> > I think this is a good idea. Other projects deal with the issue in
> > a similar way. On Oracle Studio the compiler flags are basically
> > ignored and issue a warning but produce a working binary, but the
> > build process is cluttered with warnings. Even when you fix the
> > macros this issue would stay, so restricting the checks to gcc is
> > probably the best way.
>
> Please try:
> https://www.stunnel.org/downloads/beta/stunnel-5.27b3.tar.gz
>
> Mike
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