Hello,
This diff unbreaks lang/gcc/11 on powerpc64, adds dlang to powerpc64,
and changes D's fibers on all archs; ok to commit?
gcc 11 was broken in powerpc64 bulks,
http://build-failures.rhaalovely.net/powerpc64/2021-09-27/lang/gcc/11,-c++.log
Unbreak by adding gnu-user.h (patch-gcc_config_gcc). Also add
PFRAG.powerpc64-main, to be like other archs; this PFRAG is still
missing in gcc 8. The rest of this diff is for the D programming
language, with parts for powerpc64, 32-bit powerpc, and all archs.
Add powerpc64 to ONLY_FOR_ARCHS-dlang. Add enough PPC64 code to
libphobos to complete the build. (I might be the 1st person to try D
on powerpc64.) This PPC64 code is trivial, except the code for fibers
(https://tour.dlang.org/tour/en/multithreading/fibers), where I wrote
some powerpc64 asm. I found 2 other problems with fibers:
1. The fiber crashed SIGSEGV, because it didn't pass MAP_STACK to
mmap(2). The fix is easy, and affects all archs.
2. The existing code for 32-bit powerpc was wrong; it saved the
link register at 8(%r1), should be 4(%r1), and allowed signal
handlers to clobber the values saved below %r1. I change
almost every line of 32-bit asm as I add the 64-bit asm.
The attachment "dfiber.d" is my fiber example. I can run it on macppc
and powerpc64, and you should be able to run it on any dlang arch,
$ egdc -o dfiber dfiber.d
$ ./dfiber
adder(1, 1, 1)()
1, 1, 3, 5, 9, 15, 25, 41, 67, 109, 177, 287, 465, 753
But on macppc, egdc works only with ld.bfd,
$ ln -s /usr/bin/ld.bfd ld
$ PATH=$PWD:$PATH
$ egdc -o dfiber dfiber.d
Bump REVISION-dlang for libphobos. Don't bump REVISION, because
the other changes (patch-gcc_config_gcc, and %%powerpc64%% in
PLIST-main) affect only powerpc64, which was broken.
--George
