[gcc/devel/rust/master] Merge #899

[gcc/devel/rust/master] Merge #899

[Thomas Schwinge]

https://gcc.gnu.org/g:bc7f518ac6f5c05f1c6edd7a1601f32753bab47d

commit bc7f518ac6f5c05f1c6edd7a1601f32753bab47d
Merge: 9346bddb100 ebfbdf962fb
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Sat Jan 29 12:47:51 2022 +0000

    Merge #899
    
    899: Add -frust-cfg=value option for adding config options r=philberty a=philberty
    
    This adds the initial support for config expansion on custom config values
    it need support for parsing options such as feature=test with apropriate
    error handling withing Session::handle_cfg_option(const std::string&).
    
    This also applies the mark_for_strip checks only on AST::Functions and
    will need applied to the rest of the crate in #872.
    
    Addresses #889
    
    
    Co-authored-by: Philip Herron <philip.herron@embecosm.com>

Diff:

 gcc/rust/hir/rust-ast-lower-item.h           | 12 +++--------
 gcc/rust/lang.opt                            |  4 ++++
 gcc/rust/resolve/rust-ast-resolve-item.h     |  3 +++
 gcc/rust/resolve/rust-ast-resolve-toplevel.h |  3 +++
 gcc/rust/rust-session-manager.cc             | 21 ++++++++++++++++--
 gcc/rust/rust-session-manager.h              |  3 +++
 gcc/testsuite/rust/compile/cfg1.rs           | 31 +++++++++++++++++++++++++++
 gcc/testsuite/rust/execute/torture/cfg1.rs   | 32 ++++++++++++++++++++++++++++
 8 files changed, 98 insertions(+), 11 deletions(-)