[Bug 253275] [exp-run] base system PIE default

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253275

Dawid Gorecki <dgr at semihalf.com> changed:

           What    |Removed                     |Added
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                 CC|                            |dgr at semihalf.com

--- Comment #14 from Dawid Gorecki <dgr at semihalf.com> ---
I haven't looked at all the ports yet, but from what I've seen, ports fail due
to few reasons. Some ports build static libraries and it seems that currently
the best way to fix this is by setting WITHOUT_PIE.

Some other ports could most likely work with PIE enabled, but makefiles
override default system CFLAGS and still use default LDFLAGS. This causes
linker to try linking with -pie but without -fPIC being used in compiling.
audio/play is an example, it overrides CFLAGS with -O.

Another reason that I've seen is caused by setting CFLAGS="${CFLAGS}" in
MAKE_ARGS. I'm not really sure how bmake works in this case, but I think that
it starts ignoring any further processing of CFLAGS and we are left with CFLAGS
from sys.mk and no modifications made in bsd.prog.mk are taken into account.
This happens for www/mathopd. I removed MAKE_ARGS for that and it built fine.
-DFREEBSD_SENDFILE was also properly passed further. I haven't tested if it
works after building though, but I don't see any reason why it shouldn't.

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