RISC-V: Generate -mcpu and -mtune options from riscv-cores.def.HEADtrunkmaster

Automatically generate -mcpu and -mtune options in invoke.texi from
the unified riscv-cores.def metadata, ensuring documentation stays in sync
with definitions and reducing manual maintenance.

gcc/ChangeLog:

	* Makefile.in: Add riscv-mcpu.texi and riscv-mtune.texi to the list
	of files to be processed by the Texinfo generator.
	* config/riscv/t-riscv: Add rule for generating riscv-mcpu.texi
	and riscv-mtune.texi.
	* doc/invoke.texi: Replace hand‑written extension table with
	`@include riscv-mcpu.texi` and `@include riscv-mtune.texi` to
	pull in auto‑generated entries.
	* config/riscv/gen-riscv-mcpu-texi.cc: New file.
	* config/riscv/gen-riscv-mtune-texi.cc: New file.
	* doc/riscv-mcpu.texi: New file.
	* doc/riscv-mtune.texi: New file.

0 files changed, 0 insertions, 0 deletions