attr: Register needs_allocator#4696
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This patch registers the 'needs_allocator' attribute, which is required for compiling the 'alloc' crate. Currently, it is implemented as a stub that emits a compiler warning when encountered. The reoson for this temporary stub is that full handling of 'needs_allocator' strictly depends on the 'global_allocator' infrastructure and the 'core::alloc::GlobalAlloc' trait. Since gccrs does not yet have full support for the 'core' crate, a complete implementation is deferred. gcc/rust/ChangeLog: * checks/errors/rust-builtin-attribute-checker.cc (check_inner_attribute): Add warning for needs_allocator. * util/rust-attribute-values.h (class Attributes): Add NEEDS_ALLOCATOR constexpr. * util/rust-attributes.cc (__definitions): Add BuiltinAttrDefinition for new attribute. gcc/testsuite/ChangeLog: * rust/compile/needs_allocator.rs: New test. Signed-off-by: Enes Cevik <enes@nsvke.com>
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This patch registers the 'needs_allocator' attribute, which is required for compiling the 'alloc' crate.
Currently, it is implemented as a stub that emits a compiler warning when encountered. The reoson for this temporary stub is that full handling of 'needs_allocator' strictly depends on the 'global_allocator' infrastructure and the 'core::alloc::GlobalAlloc' trait. Since gccrs does not yet have full support for the 'core' crate, a complete implementation is deferred.
gcc/rust/ChangeLog:
gcc/testsuite/ChangeLog: