MaskRay created this revision. MaskRay added reviewers: compnerd, rsmith, t.p.northover. Herald added a project: clang. Herald added a subscriber: cfe-commits.
Modern ELF platforms use -fuse-init-array to emit .init_array instead of .ctors . ld.bfd and gold merge .init_array and .ctors into .init_array but lld doesn't do that. If crtbegin*.o crtend*.o don't provide .ctors/.dtors, such .ctors in user object files can lead to crash (see PR42002. The first and the last elements in .ctors/.dtors are ignored - they are traditionally provided by crtbegin*.o crtend*.o). Call addClangTargetOptions() to ensure -fuse-init-array is rendered on modern ELF platforms. Repository: rC Clang https://reviews.llvm.org/D62509 Files: lib/Driver/ToolChains/Clang.cpp test/Driver/fembed-bitcode.c Index: test/Driver/fembed-bitcode.c =================================================================== --- test/Driver/fembed-bitcode.c +++ test/Driver/fembed-bitcode.c @@ -26,3 +26,6 @@ // CHECK-AARCH64: "darwinpcs" // CHECK-AARCH64-NOT: "-fdebug-compilation-dir" +// RUN: %clang -target x86_64-pc-freebsd12 -fembed-bitcode=all -c %s -o /dev/null -### 2>&1 \ +// RUN: | FileCheck -check-prefix CHECK-INITARRAY %s +// CHECK-INITARRAY: "-fuse-init-array" Index: lib/Driver/ToolChains/Clang.cpp =================================================================== --- lib/Driver/ToolChains/Clang.cpp +++ lib/Driver/ToolChains/Clang.cpp @@ -3671,6 +3671,9 @@ // Disable all llvm IR level optimizations. CmdArgs.push_back("-disable-llvm-passes"); + // Render target options such as -fuse-init-array on modern ELF platforms. + TC.addClangTargetOptions(Args, CmdArgs, JA.getOffloadingDeviceKind()); + // reject options that shouldn't be supported in bitcode // also reject kernel/kext static const constexpr unsigned kBitcodeOptionBlacklist[] = {
Index: test/Driver/fembed-bitcode.c =================================================================== --- test/Driver/fembed-bitcode.c +++ test/Driver/fembed-bitcode.c @@ -26,3 +26,6 @@ // CHECK-AARCH64: "darwinpcs" // CHECK-AARCH64-NOT: "-fdebug-compilation-dir" +// RUN: %clang -target x86_64-pc-freebsd12 -fembed-bitcode=all -c %s -o /dev/null -### 2>&1 \ +// RUN: | FileCheck -check-prefix CHECK-INITARRAY %s +// CHECK-INITARRAY: "-fuse-init-array" Index: lib/Driver/ToolChains/Clang.cpp =================================================================== --- lib/Driver/ToolChains/Clang.cpp +++ lib/Driver/ToolChains/Clang.cpp @@ -3671,6 +3671,9 @@ // Disable all llvm IR level optimizations. CmdArgs.push_back("-disable-llvm-passes"); + // Render target options such as -fuse-init-array on modern ELF platforms. + TC.addClangTargetOptions(Args, CmdArgs, JA.getOffloadingDeviceKind()); + // reject options that shouldn't be supported in bitcode // also reject kernel/kext static const constexpr unsigned kBitcodeOptionBlacklist[] = {
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