[clang-ifs] Clang Interface Stubs, first version (second landing attempt).
This change reverts r363649; effectively re-landing r363626. At this point
clang::Index::CodegenNameGeneratorImpl has been refactored into
clang::AST::ASTNameGenerator. This makes it so that the previous circular link
dependency no longer exists, fixing the previous share lib
(-DBUILD_SHARED_LIBS=ON) build issue which was the reason for r363649.
Clang interface stubs (previously referred to as clang-ifsos) is a new frontend
action in clang that allows the generation of stub files that contain mangled
name info that can be used to produce a stub library. These stub libraries can
be useful for breaking up build dependencies and controlling access to a
library's internal symbols. Generation of these stubs can be invoked by:
clang -fvisibility=<visibility> -emit-interface-stubs \
-interface-stub-version=<interface format>
Notice that -fvisibility (along with use of visibility attributes) can be used
to control what symbols get generated. Currently the interface format is
experimental but there are a wide range of possibilities here.
Currently clang-ifs produces .ifs files that can be thought of as analogous to
object (.o) files, but just for the mangled symbol info. In a subsequent patch
I intend to add support for merging the .ifs files into one .ifs/.ifso file
that can be the input to something like llvm-elfabi to produce something like a
.so file or .dll (but without any of the code, just symbols).
Differential Revision: https://reviews.llvm.org/D60974
llvm-svn: 363948
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index d36af28..b90950f 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1681,6 +1681,25 @@
Opts.ProgramAction = frontend::GenerateHeaderModule; break;
case OPT_emit_pch:
Opts.ProgramAction = frontend::GeneratePCH; break;
+ case OPT_emit_iterface_stubs: {
+ llvm::Optional<frontend::ActionKind> ProgramAction =
+ llvm::StringSwitch<llvm::Optional<frontend::ActionKind>>(
+ Args.hasArg(OPT_iterface_stub_version_EQ)
+ ? Args.getLastArgValue(OPT_iterface_stub_version_EQ)
+ : "")
+ .Case("experimental-yaml-elf-v1",
+ frontend::GenerateInterfaceYAMLExpV1)
+ .Case("experimental-tapi-elf-v1",
+ frontend::GenerateInterfaceTBEExpV1)
+ .Default(llvm::None);
+ if (!ProgramAction)
+ Diags.Report(diag::err_drv_invalid_value)
+ << "Must specify a valid interface stub format type using "
+ << "-interface-stub-version=<experimental-tapi-elf-v1 | "
+ "experimental-yaml-elf-v1>";
+ Opts.ProgramAction = *ProgramAction;
+ break;
+ }
case OPT_init_only:
Opts.ProgramAction = frontend::InitOnly; break;
case OPT_fsyntax_only:
@@ -3119,6 +3138,8 @@
case frontend::GenerateModuleInterface:
case frontend::GenerateHeaderModule:
case frontend::GeneratePCH:
+ case frontend::GenerateInterfaceYAMLExpV1:
+ case frontend::GenerateInterfaceTBEExpV1:
case frontend::ParseSyntaxOnly:
case frontend::ModuleFileInfo:
case frontend::VerifyPCH: