[Bug 1836045] Re: ftbfs: gnat cross targeting powerpc

[Seth Forshee]

That's not true; most architectures don't have a match for SO_RCVTIMEO,
as they're using the definition from asm-generic, just as powerpc should
be. The others were updated differently because they do not include asm-
generic/socket.h. And powerpc clearly does have a definition for it,
since the build complains that SO_RCVTIMEO_OLD is not defined and not
SO_RCVTIMEO. The question is why isn't SO_RCVTIMEO_OLD defined.

I tried cross-compiling the following for ppc64el and did not receive
any errors about SO_RCVTIMEO or SO_RCVTIMEO_OLD being undefined, nor did
it complain when I used SO_RCVTIMEO_OLD, so it seems like it's working
as intended. That leaves me wondering whether something isn't including
asm-generic/socket.h when it should be including asm/socket.h, or
something like that. I don't see any such mistakes in linux-libc-dev
though.

#include <stdio.h>
#include <sys/socket.h>

int main(void)
{
        printf("%d\n", SO_RCVTIMEO);
        return 0;
}

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Title:
  ftbfs: gnat cross targeting powerpc

Status in gcc-8-cross package in Ubuntu:
  Confirmed
Status in gcc-9-cross package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  both seen with gcc-8-cross and gcc-9-cross (search the build logs for
  "unfinished":

  /<<PKGBUILDDIR>>/gcc/build/./gcc/xgcc -B/<<PKGBUILDDIR>>/gcc/build/./gcc/ -B/usr/powerpc-linux-gnu/bin/ -B/usr/powerpc-li
  nux-gnu/lib/ -isystem /usr/powerpc-linux-gnu/include -isystem /usr/powerpc-linux-gnu/sys-include -isystem /<<PKGBUILDDIR>
  >/gcc/build/sys-include    -c -g -O2   -W -Wall -gnatpg -nostdinc  -gnatn  a-direct.adb -o a-direct.o
  a-direct.adb:734:27: "NAME_MAX" is undefined
  a-direct.adb:743:28: "SIZEOF_struct_dirent_alloc" is undefined
  a-direct.adb:1210:24: "ENOENT" is undefined
  s-filatt.ads:62:18: "SIZEOF_struct_file_attributes" not declared in "OS_Constants"
  s-oscons.ads:50:26: "Target_OS" is undefined
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  make[9]: *** [../gcc-interface/Makefile:299: a-direct.o] Error 1
  make[9]: Leaving directory '/<<PKGBUILDDIR>>/gcc/build/gcc/ada/rts'
  make[8]: *** [gcc-interface/Makefile:623: gnatlib] Error 2

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