Aleksandar Rakic 6ae5a2a6ba [PATCH v6 1/1] Add --with-multi-buildlist configure option ...

This patch introduces a new configure-time option --with-multi-buildlist
to allow fine-grained control over which multilib variants are built.

The option accepts a path to a file containing a list of multilib
directories to be included in the build.  Each line in the file should
contain a single multilib directory name, matching those generated by
the compiler's --print-multi-lib output.

This mechanism is target-independent and enables users to reduce build
time and binary size by excluding unnecessary multilib variants.  It is
especially useful for embedded targets with constrained environments or
vendor-specific requirements.

The option is propagated to both host and target configuration stages,
and used in config-ml.in and gcc/Makefile.in to filter the multilib
list.

Documentation for this feature is added to gcc/doc/install.texi.

/ChangeLog

	* config-ml.in: Use with_multi_buildlist to build multidirs.
	Skip configuration for subdir returned by
	--print-multi-directory.
	* configure: Regenerate.
	* configure.ac: Source target-specific configuration fragment
	for GCC. Pass through with_multi_buildlist to host and target.

gcc/ChangeLog

	* Makefile.in: Add with_multi_buildlist for multilib
	configuration control. Pass an additional argument to
	genmultilib indicating whether --with-multi-buildlist is set
	(true or false). Use with_multi_buildlist to filter
	multilib directories in fixinc_list.
	* configure: Regenerate.
	* configure.ac: Restrict the installed fixedincludes multilibs.
	* configure.tgt: New file.
	* doc/install.texi: Add --with-multi-buildlist configure option
	for multilib filtering.
	* genmultilib: Document the new eleventh argument indicating
	whether --with-multi-buildlist configure option is set (true or
	false). Update argument parsing to include this flag before
	enable_multilib. Modify reuse rule validation:
	- Keep the original error for reuse of nonexistent multilibs
	when --with-multi-buildlist is not used.
	- Suppress the error only when the new configure option is
	active, allowing reuse rules to reference multilibs that are
	intentionally excluded from the build.

Signed-off-by: Robert Suchanek <robert.suchanek@imgtec.com>
Signed-off-by: Chao-ying Fu <cfu@mips.com>
Signed-off-by: Aleksandar Rakic <aleksandar.rakic@htecgroup.com>

2026-01-08 08:59:34 -07:00

637 KiB

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