[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/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 3bda715..925ded7 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -285,6 +285,7 @@
(PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
(PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
(PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
+ (PhaseArg = DAL.getLastArg(options::OPT_emit_iterface_stubs)) ||
(PhaseArg = DAL.getLastArg(options::OPT__analyze,
options::OPT__analyze_auto)) ||
(PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
@@ -3472,6 +3473,8 @@
return C.MakeAction<CompileJobAction>(Input, types::TY_ModuleFile);
if (Args.hasArg(options::OPT_verify_pch))
return C.MakeAction<VerifyPCHJobAction>(Input, types::TY_Nothing);
+ if (Args.hasArg(options::OPT_emit_iterface_stubs))
+ return C.MakeAction<CompileJobAction>(Input, types::TY_IFS);
return C.MakeAction<CompileJobAction>(Input, types::TY_LLVM_BC);
}
case phases::Backend: {