Enable a 32-bit "native" toolchain on x86_64-*-linux-gnu and
x86_64-*-mingw32, i.e., one that targets -m32 by default, despite
supporting and potentially running in 64-bit mode, by appending abi32
to the triplet, and/or by setting the default ABI to 32 or m32.
Adjust libada and gnattools build machinery to support this
configuration in both bootstrap and non-bootstrap modes.
Co-Authored-By: Alexandre Oliva <oliva@adacore.com>
for gcc/ChangeLog
* config.gcc [x86_64-*-*]: Match *abi32 target, default to m32
abi. Accept 32 or m32 for --with-abi.
for gcc/ada/ChangeLog
* gcc-interface/Make-lang.in (m32_target): Set.
(not_m32_target, native_target, native_gnattools1): Set.
(ADA_TOOLS_FLAGS_TO_PASS, gnattools): Handle x86_64 natives
defaulting to -m32 as cross for gnattools.
* gcc-interface/Makefile.in (target_cpu): Set to i686 for
x86_64 configurations defaulting to -m32.
for gnattools/ChangeLog
* configure.ac (default_gnattools_target): Use gnattools-cross
when not bootstrapping x86_64 configurations defaulting to
-m32.
* configure: Rebuild.
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