armv7, building p7zip and -fPIC

[Warner Losh]

On Sat, Oct 7, 2017 at 11:24 AM, Guy Yur <guyyur at gmail.com> wrote:

> Hi,
>
> Does armv7 need -fPIC when compiling?
>
> Building archivers/p7zip fails with:
> /usr/bin/ld: 7zEncode.o(.text+0x2d04): unresolvable R_ARM_MOVW_ABS_NC
> relocation against symbol `_ZTIi@@CXXABI_1.3'
> /usr/bin/ld: final link failed: Nonrepresentable section on output
> c++: error: linker command failed with exit code 1 (use -v to see
> invocation)
> *** [../../../../bin/7z.so] Error code 1
>
> make[3]: stopped in
> /usr/wrkdir/usr/ports/archivers/p7zip/work/p7zip_16.02/CPP/7zip/Bundles/
> Format7zFree
> 1 error
>
> If I add "CFLAGS_armv7= -fPIC" in the port Makefile it builds fine.
> The port has -fPIC for aarch64, amd64, powerpc and sparc64.
>
> Is it a difference from armv6?
> When I previously built for armv6 it worked without the option.
>

armv7 is new in FreeBSD (two days old), and maybe you are tripping over
something inside the port that optimized for it? Is there a
CFLAGS+armv6=-fPIC? I don't see it with a quick grep, but you never
know...  If that's what it takes to fix it, maybe you should submit that to
the port maintainer?

Warner