[Bug target/112300] [14 Regression] Cross compiling to mipsisa64r2-sde-elf fails because "HEAP_TRAMPOLINES_INIT was not declared in this scope" since r14-4821-g28d8c680aaea46

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112300

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:221166ad15eb37b047c77118f2eb1c8442eaa27b

commit r14-5868-g221166ad15eb37b047c77118f2eb1c8442eaa27b
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Mon Nov 27 09:22:20 2023 +0100

    mips: Fix up mips*-sde-elf* build [PR112300]

    As reported in the PR, mipsisa64r2-sde-elf doesn't build because
HEAP_TRAMPOLINES_INIT
    macro isn't defined anywhere.
    It is normally defined by
     # Figure out if we need to enable heap trampolines by default
     case ${target} in
     *-*-darwin2*)
       # Currently, we do this for macOS 11 and above.
       tm_defines="$tm_defines HEAP_TRAMPOLINES_INIT=1"
       ;;
     *)
       tm_defines="$tm_defines HEAP_TRAMPOLINES_INIT=0"
       ;;
     esac
    in config.gcc, but mips*-sde-elf* is the only target which overwrites
    tm_defines shell variable rather than just appending to it (or in one case
    prepending), all other targets append something to it, including other
    mips* triplets.
    I believe (just from looking at config.gcc) that the difference is that
    LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4
HEAP_TRAMPOLINES_INIT=0
    isn't defined without the patch and is with the patch.

    I think defining those first 4 shouldn't cause any harm and defining the
    last one is required for it to actually build at all.

    2023-11-27  Jakub Jelinek  <jakub@redhat.com>

            PR target/112300
            * config.gcc (mips*-sde-elf*): Append to tm_defines rather than
            overwriting them.