Re: libgccjit

[Achim Gratz <Stromeko@nexgo.de>]

Achim Gratz writes:
> That also needs --enable-host-shared and then it dies shortly after
> configure because it can't find libiberty.a in $build_subdir which does
> not exist.  The library itself is already made in the libiberty
> directory, so some sort of install step went missing.  If I drop the
> file there, it then proceeds to want the same thing in yet another
> subdir.  Repeating the exercise gets me one step further after which it
> looks for the same file in a third place…  dropping it there also seems
> to get the compile rolling along, but there is clearly something
> missing, either in configure or with the general handling of the target
> triple.

It removes one of those places and later expects to find libiberty.a
again there (plus for whatever reason can't run "make -j" from that
point on).  Monkey-fixing that and letting it move on finally gets me
to:

/mnt/share/cygpkgs/gcc/gcc.x86_64/build/./prev-gcc/xg++ -B/mnt/share/cygpkgs/gcc/gcc.x86_64/build/./prev-gcc/ -B/usr/x86_64-pc-cygwin/bin/ -nostdinc++ -B/mnt/share/cygpkgs/gcc/gcc.x86_64/build/prev-x86_64-pc-cygwin/libstdc++-v3/src/.libs -B/mnt/share/cygpkgs/gcc/gcc.x86_64/build/prev-x86_64-pc-cygwin/libstdc++-v3/libsupc++/.libs  -I/mnt/share/cygpkgs/gcc/gcc.x86_64/build/prev-x86_64-pc-cygwin/libstdc++-v3/include/x86_64-pc-cygwin  -I/mnt/share/cygpkgs/gcc/gcc.x86_64/build/prev-x86_64-pc-cygwin/libstdc++-v3/include  -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/libstdc++-v3/libsupc++ -L/mnt/share/cygpkgs/gcc/gcc.x86_64/build/prev-x86_64-pc-cygwin/libstdc++-v3/src/.libs -L/mnt/share/cygpkgs/gcc/gcc.x86_64/build/prev-x86_64-pc-cygwin/libstdc++-v3/libsupc++/.libs -fno-PIE -c  -DIN_GCC_FRONTEND -g -O2 -fno-checking -gtoggle -DIN_GCC -fPIC    -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -I. -Ijit -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/jit -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/../include -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/../libcpp/include  -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/../libdecnumber -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/../libdecnumber/bid -I../libdecnumber -I/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/../libbacktrace   -o jit/jit-playback.o -MT jit/jit-playback.o -MMD -MP -MF jit/.deps/jit-playback.TPo /mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/jit/jit-playback.c
/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/jit/jit-playback.c: In member function ‘gcc::jit::result* gcc::jit::playback::context::dlopen_built_dso()’:
/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/jit/jit-playback.c:2652:3: error: ‘dlerror’ was not declared in this scope; did you mean ‘error’?
 2652 |   dlerror ();
      |   ^~~~~~~
      |   error
/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/jit/jit-playback.c:2655:6: error: ‘RTLD_NOW’ was not declared in this scope
 2655 |      RTLD_NOW | RTLD_LOCAL);
      |      ^~~~~~~~
/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/jit/jit-playback.c:2655:17: error: ‘RTLD_LOCAL’ was not declared in this scope
 2655 |      RTLD_NOW | RTLD_LOCAL);
      |                 ^~~~~~~~~~
/mnt/share/cygpkgs/gcc/gcc.x86_64/src/gcc-10.2.0/gcc/jit/jit-playback.c:2654:12: error: ‘dlopen’ was not declared in this scope; did you mean ‘open’?
 2654 |   handle = dlopen (m_tempdir->get_path_so_file (),
      |            ^~~~~~
      |            open

I can pile on another kludge to make that compile and eventully it'll
end up linking libgccjit, but the build then stops with an error that is
not so easily skipped.

So no, Cygwin is not one of the targets that libgccjit is intended to
work on yet and needs work.


Regards,
Achim.
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