4 Commits

Include renames

Author	SHA1	Message	Date
Richard Smith	6e7c035bef	Stop emitting llvm.ident metadata saying the compiler was Clang. (#5520)	2025-05-22 18:48:58 +00:00
Boaz Brickner	852d0191a9	Add support for importing C++ inline functions (#5427) ... This requires: * Making `FunctionDecl` mutable since generating code (`HandleTopLevelDecl()`) requires a mutable declaration and since we manually add `used` attribute to force code generation. * Passing the file system to `Lower` since it's needed by Clang code generation. * Creating an internal Clang LLVM module and link it against the Carbon LLVM module. Demo: ```c++ // hello_world.h extern int puts; inline void hello_world() { ((int (*)(const char*))&puts)("hello world"); } ``` ```carbon // main.carbon library "Main"; import Cpp library "hello_world.h"; fn Run() -> i32 { Cpp.hello_world(); return 0; } ``` ```shell $ bazel-bin/toolchain/carbon compile main.carbon $ bazel-bin/toolchain/carbon link main.o --output=demo $ ./demo hello world ``` Based on https://github.com/carbon-language/carbon-lang/pull/5406. Part of #5405.	2025-05-21 07:02:05 +00:00
Boaz Brickner	2cb0df42e0	Add C++ interop inline function tests (#5406) ... This shows that `inline` is ignored and the function definition is not generated. Demo: ```c++ // hello_world.h inline void hello_world() {} ``` ```carbon // main.carbon library "Main"; import Cpp library "hello_world.h"; fn Run() -> i32 { Cpp.hello_world(); return 0; } ``` ```shell $ bazel-bin/toolchain/carbon compile main.carbon $ bazel-bin/toolchain/carbon link main.o --output=demo ld.lld: error: undefined symbol: hello_world() >>> referenced by main.carbon:8 >>> main.o:(main) error: linker command failed with exit code 1 (use -v to see invocation) ``` Part of #5405.	2025-05-09 16:33:16 +00:00
Boaz Brickner	156ab889f8	Support mangling imported C++ functions using Clang's MangleContext (#5062) ... Keep a pointer to the Clang declaration in Carbon's function declaration and use it in Carbon mangling by calling Clang mangling. Create Clang's `MangleContext` once on demand. Part of #4666. C++ Interop Demo: ```c++ // hello_world.h void hello_world(); ``` ```c++ // hello_world.cpp #include <cstdio> void hello_world() { printf("Hello World!\n"); } ``` ``` // main.carbon library "Main"; import Cpp library "hello_world.h"; fn Run() -> i32 { Cpp.hello_world(); return 0; } ``` ```shell $ clang -c hello_world.cpp $ bazel-bin/toolchain/carbon compile main.carbon $ bazel-bin/toolchain/carbon link hello_world.o main.o --output=demo $ ./demo Hello World! ```	2025-03-06 09:51:01 +00:00