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

[Jakub Jelinek]

Hi!

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.

Ok for trunk?

Totally untested though...

2023-11-24  Jakub Jelinek  <ja...@redhat.com>

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

--- gcc/config.gcc.jj   2023-11-18 09:35:20.625089143 +0100
+++ gcc/config.gcc      2023-11-24 16:41:39.194495079 +0100
@@ -2682,22 +2682,22 @@ mips*-sde-elf*)
        esac
        case ${target} in
          mipsisa32r6*)
-           tm_defines="MIPS_ISA_DEFAULT=MIPS_ISA_MIPS32R6 
MIPS_ABI_DEFAULT=ABI_32"
+           tm_defines="${tm_defines} MIPS_ISA_DEFAULT=MIPS_ISA_MIPS32R6 
MIPS_ABI_DEFAULT=ABI_32"
            ;;
          mipsisa32r2*)
-           tm_defines="MIPS_ISA_DEFAULT=MIPS_ISA_MIPS32R2 
MIPS_ABI_DEFAULT=ABI_32"
+           tm_defines="${tm_defines} MIPS_ISA_DEFAULT=MIPS_ISA_MIPS32R2 
MIPS_ABI_DEFAULT=ABI_32"
            ;;
          mipsisa32*)
-           tm_defines="MIPS_ISA_DEFAULT=MIPS_ISA_MIPS32 
MIPS_ABI_DEFAULT=ABI_32"
+           tm_defines="${tm_defines} MIPS_ISA_DEFAULT=MIPS_ISA_MIPS32 
MIPS_ABI_DEFAULT=ABI_32"
            ;;
          mipsisa64r6*)
-           tm_defines="MIPS_ISA_DEFAULT=MIPS_ISA_MIPS64R6 
MIPS_ABI_DEFAULT=ABI_N32"
+           tm_defines="${tm_defines} MIPS_ISA_DEFAULT=MIPS_ISA_MIPS64R6 
MIPS_ABI_DEFAULT=ABI_N32"
            ;;
          mipsisa64r2*)
-           tm_defines="MIPS_ISA_DEFAULT=MIPS_ISA_MIPS64R2 
MIPS_ABI_DEFAULT=ABI_N32"
+           tm_defines="${tm_defines} MIPS_ISA_DEFAULT=MIPS_ISA_MIPS64R2 
MIPS_ABI_DEFAULT=ABI_N32"
            ;;
          mipsisa64*)
-           tm_defines="MIPS_ISA_DEFAULT=MIPS_ISA_MIPS64 
MIPS_ABI_DEFAULT=ABI_N32"
+           tm_defines="${tm_defines} MIPS_ISA_DEFAULT=MIPS_ISA_MIPS64 
MIPS_ABI_DEFAULT=ABI_N32"
            ;;
        esac
        ;;

        Jakub