Library build options from --with-multilib-list used to be processed with
*self_spec, which missed the driver's initial canonicalization. This
caused limitations on CFLAGS override and the use of driver-only options
like -m[no]-lsx.
The problem is solved by promoting the injection rules of --with-multilib-list
options to the first element of DRIVER_SELF_SPECS, to make them execute before
the canonialization. The library-build options are also hard-coded in
the driver and can be used conveniently by the builders of other non-gcc
libraries via the use of -fmultiflags.
Bootstrapped and tested on loongarch64-linux-gnu.
ChangeLog:
* config-ml.in: Remove unneeded loongarch clause.
* configure.ac: Register custom makefile fragments mt-loongarch-*
for loongarch targets.
* configure: Regenerate.
config/ChangeLog:
* mt-loongarch-mlib: New file. Pass -fmultiflags when building
target libraries (FLAGS_FOR_TARGET).
* mt-loongarch-elf: New file.
* mt-loongarch-gnu: New file.
gcc/ChangeLog:
* config.gcc: Pass the default ABI via TM_MULTILIB_CONFIG.
* config/loongarch/loongarch-driver.h: Invoke MLIB_SELF_SPECS
before the driver canonicalization routines.
* config/loongarch/loongarch.h: Move definitions of CC1_SPEC etc.
to loongarch-driver.h
* config/loongarch/t-linux: Move multilib-related definitions to
t-multilib.
* config/loongarch/t-multilib: New file. Inject library build
options obtained from --with-multilib-list.
* config/loongarch/t-loongarch: Same.
