[Bug target/109984] New: FAIL: insn-modes.h: No such file or directory (x86_64-apple-darwin22.4.0)

["gcc-zm31 at proton dot me" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109984

            Bug ID: 109984
           Summary: FAIL: insn-modes.h: No such file or directory
                    (x86_64-apple-darwin22.4.0)
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gcc-zm31 at proton dot me
  Target Milestone: ---

When attempting to build GCC with an experimental language frontend, I
encounter the following error:

In file included from ../../gcc-src/gcc/rinto/rin-system.hpp:30,
                 from ../../gcc-src/gcc/rinto/frontend/backend.hpp:4,
                 from ../../gcc-src/gcc/rinto/frontend/diagnostic.hpp:37,
                 from ../../gcc-src/gcc/rinto/frontend/diagnostic.cc:33:
../../gcc-src/gcc/coretypes.h:458:10: fatal error: insn-modes.h: No such file
or directory
  458 | #include "insn-modes.h"

This only seems to be an issue when passing the -j flag to make. When I
otherwise run 'make' on a single processor (without -j), the project compiles.
I suspect there might be some oversight on my part, though it could be an issue
with the order in which GCC generates header files.

The project is configured as follows:
../gcc-src/configure --prefix=/Users/mz/Desktop/gcc-build/../gcc-install
--enable-languages=c,c++,rinto
--with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
--disable-nls --enable-checking=release --with-gcc-major-version-only
--with-system-zlib

And the make command:
make -j$(getconf _NPROCESSORS_ONLN)

where 'getconf _NPROCESSORS_ONLN; yields 16.

Target: x86_64-apple-darwin22.4.0 (though the problem persists on my Ubuntu 22
machine as well). 

SOURCE-A: https://github.com/rintolang/rinto/tree/main/src/gcc
SOURCE-B: https://github.com/rintolang/rinto/tree/main/src/frontend

The contents of SOURCE-A are placed in [GCC-ROOT]/gcc/rinto and SOURCE-B in
[GCC-ROOT]/gcc/rinto/frontend.