With gcc 6.3.0, I hit the following compilation bug:
/home/yhs/work/llvm-project/clang/lib/Frontend/CompilerInvocation.cpp:
In function ‘bool ParseCodeGenArgs(clang::CodeGenOptions&, llvm::opt::ArgList&,
clang::InputKind, clang::DiagnosticsEngine&, const clang::TargetOptions&,
const clang::FrontendOptions&)’:
/home/yhs/work/llvm-project/clang/lib/Frontend/CompilerInvocation.cpp:780:12:
error: unused variable ‘A’ [-Werror=unused-variable]
if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
^
cc1plus: all warnings being treated as errors
The bug is introduced by Commit
ae6523cd62a4 ("[DebugInfo] Add
-fuse-ctor-homing cc1 flag so we can turn on constructor homing only
if limited debug info is already on.")
}
// If -fuse-ctor-homing is set and limited debug info is already on, then use
// constructor homing.
- if (Arg *A = Args.getLastArg(OPT_fuse_ctor_homing))
+ if (Args.getLastArg(OPT_fuse_ctor_homing))
if (Opts.getDebugInfo() == codegenoptions::LimitedDebugInfo)
Opts.setDebugInfo(codegenoptions::DebugInfoConstructor);