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68f29dac4b
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
32 lines
961 B
C++
32 lines
961 B
C++
// RUN: %clang -target x86_64-unknown-linux-gnu -o - -emit-interface-stubs \
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// RUN: -interface-stub-version=experimental-tapi-elf-v1 %s | \
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// RUN: FileCheck %s
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// RUN: %clang -target x86_64-unknown-linux-gnu -o - -c %s | llvm-nm - 2>&1 | \
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// RUN: FileCheck -check-prefix=CHECK-SYMBOLS %s
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// CHECK: Symbols:
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// CHECK-DAG: _ZN3qux3barEii: { Type: Func }
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// CHECK-DAG: _ZN3baz3addIiEET_S1_S1_: { Type: Func }
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// CHECK-DAG: _Z4fbarff: { Type: Func }
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// CHECK-DAG: _ZN3baz3addIfEET_S1_S1_: { Type: Func }
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// Same symbols just different order.
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// CHECK-SYMBOLS-DAG: _Z4fbarff
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// CHECK-SYMBOLS-DAG: _ZN3baz3addIfEET_S1_S1_
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// CHECK-SYMBOLS-DAG: _ZN3baz3addIiEET_S1_S1_
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// CHECK-SYMBOLS-DAG: _ZN3qux3barEii
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namespace baz {
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template <typename T>
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T add(T a, T b) {
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return a + b;
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}
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} // namespace baz
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namespace qux {
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int bar(int a, int b) { return baz::add<int>(a, b); }
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} // namespace qux
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float fbar(float a, float b) { return baz::add<float>(a, b); }
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