[Driver][Fuchsia] Avoid "argument unused" warnings #118416
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There should not be an error or warning reported for using redundant options to control what goes into the link. For example, -nolibc -nostdlib.
llvmbot
added
clang
Member
|
@llvm/pr-subscribers-clang Author: Roland McGrath (frobtech) ChangesThere should not be an error or warning reported for using Full diff: https://github.com/llvm/llvm-project/pull/118416.diff 2 Files Affected:
diff --git a/clang/lib/Driver/ToolChains/Fuchsia.cpp b/clang/lib/Driver/ToolChains/Fuchsia.cpp
index 72accbff4a3bf2..c2badc80a7b452 100644
--- a/clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ b/clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -156,6 +156,12 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
addLinkerCompressDebugSectionsOption(ToolChain, Args, CmdArgs);
AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
+ // Sample these options first so they are claimed even under -nostdlib et al.
+ bool NoLibc = Args.hasArg(options::OPT_nolibc);
+ bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
+ !Args.hasArg(options::OPT_static);
+ bool Pthreads = Args.hasArg(options::OPT_pthread, options::OPT_pthreads);
+ bool SplitStack = Args.hasArg(options::OPT_fsplit_stack);
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
options::OPT_r)) {
if (Args.hasArg(options::OPT_static))
@@ -163,8 +169,6 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
if (D.CCCIsCXX()) {
if (ToolChain.ShouldLinkCXXStdlib(Args)) {
- bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
- !Args.hasArg(options::OPT_static);
CmdArgs.push_back("--push-state");
CmdArgs.push_back("--as-needed");
if (OnlyLibstdcxxStatic)
@@ -188,14 +192,13 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
- if (Args.hasArg(options::OPT_pthread) ||
- Args.hasArg(options::OPT_pthreads))
+ if (Pthreads)
CmdArgs.push_back("-lpthread");
- if (Args.hasArg(options::OPT_fsplit_stack))
+ if (SplitStack)
CmdArgs.push_back("--wrap=pthread_create");
- if (!Args.hasArg(options::OPT_nolibc))
+ if (!NoLibc)
CmdArgs.push_back("-lc");
}
@@ -229,7 +232,7 @@ void fuchsia::StaticLibTool::ConstructJob(Compilation &C, const JobAction &JA,
for (const auto &II : Inputs) {
if (II.isFilename()) {
- CmdArgs.push_back(II.getFilename());
+ CmdArgs.push_back(II.getFilename());
}
}
@@ -343,16 +346,14 @@ std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
return Triple.str();
}
-Tool *Fuchsia::buildLinker() const {
- return new tools::fuchsia::Linker(*this);
-}
+Tool *Fuchsia::buildLinker() const { return new tools::fuchsia::Linker(*this); }
Tool *Fuchsia::buildStaticLibTool() const {
return new tools::fuchsia::StaticLibTool(*this);
}
-ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
- const ArgList &Args) const {
+ToolChain::RuntimeLibType
+Fuchsia::GetRuntimeLibType(const ArgList &Args) const {
if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
StringRef Value = A->getValue();
if (Value != "compiler-rt")
@@ -363,13 +364,12 @@ ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
return ToolChain::RLT_CompilerRT;
}
-ToolChain::CXXStdlibType
-Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
+ToolChain::CXXStdlibType Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
StringRef Value = A->getValue();
if (Value != "libc++")
getDriver().Diag(diag::err_drv_invalid_stdlib_name)
- << A->getAsString(Args);
+ << A->getAsString(Args);
}
return ToolChain::CST_Libcxx;
diff --git a/clang/test/Driver/fuchsia.c b/clang/test/Driver/fuchsia.c
index 83dee16981690a..cf92f85040901c 100644
--- a/clang/test/Driver/fuchsia.c
+++ b/clang/test/Driver/fuchsia.c
@@ -297,3 +297,9 @@
// RUN: %clang --target=riscv64-unknown-fuchsia -mno-relax -### %s 2>&1 \
// RUN: | FileCheck -check-prefix=RISCV64-FLAGS %s
// RISCV64-FLAGS: "-X" "--no-relax"
+
+// RUN: %clang -### %s --target=x86_64-unknown-fuchsia 2>&1 \
+// RUN: -nostdlib -nolibc \
+// RUN: | FileCheck %s -check-prefix=CHECK-NOSTDLIB-NOLIBC
+// CHECK-NOSTDLIB-NOLIBC-NOT: "warning:"
+// CHECK-NOSTDLIB-NOLIBC-NOT: "error:"
|
Member
|
@llvm/pr-subscribers-clang-driver Author: Roland McGrath (frobtech) ChangesThere should not be an error or warning reported for using Full diff: https://github.com/llvm/llvm-project/pull/118416.diff 2 Files Affected:
diff --git a/clang/lib/Driver/ToolChains/Fuchsia.cpp b/clang/lib/Driver/ToolChains/Fuchsia.cpp
index 72accbff4a3bf2..c2badc80a7b452 100644
--- a/clang/lib/Driver/ToolChains/Fuchsia.cpp
+++ b/clang/lib/Driver/ToolChains/Fuchsia.cpp
@@ -156,6 +156,12 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
addLinkerCompressDebugSectionsOption(ToolChain, Args, CmdArgs);
AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
+ // Sample these options first so they are claimed even under -nostdlib et al.
+ bool NoLibc = Args.hasArg(options::OPT_nolibc);
+ bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
+ !Args.hasArg(options::OPT_static);
+ bool Pthreads = Args.hasArg(options::OPT_pthread, options::OPT_pthreads);
+ bool SplitStack = Args.hasArg(options::OPT_fsplit_stack);
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
options::OPT_r)) {
if (Args.hasArg(options::OPT_static))
@@ -163,8 +169,6 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
if (D.CCCIsCXX()) {
if (ToolChain.ShouldLinkCXXStdlib(Args)) {
- bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
- !Args.hasArg(options::OPT_static);
CmdArgs.push_back("--push-state");
CmdArgs.push_back("--as-needed");
if (OnlyLibstdcxxStatic)
@@ -188,14 +192,13 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
- if (Args.hasArg(options::OPT_pthread) ||
- Args.hasArg(options::OPT_pthreads))
+ if (Pthreads)
CmdArgs.push_back("-lpthread");
- if (Args.hasArg(options::OPT_fsplit_stack))
+ if (SplitStack)
CmdArgs.push_back("--wrap=pthread_create");
- if (!Args.hasArg(options::OPT_nolibc))
+ if (!NoLibc)
CmdArgs.push_back("-lc");
}
@@ -229,7 +232,7 @@ void fuchsia::StaticLibTool::ConstructJob(Compilation &C, const JobAction &JA,
for (const auto &II : Inputs) {
if (II.isFilename()) {
- CmdArgs.push_back(II.getFilename());
+ CmdArgs.push_back(II.getFilename());
}
}
@@ -343,16 +346,14 @@ std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
return Triple.str();
}
-Tool *Fuchsia::buildLinker() const {
- return new tools::fuchsia::Linker(*this);
-}
+Tool *Fuchsia::buildLinker() const { return new tools::fuchsia::Linker(*this); }
Tool *Fuchsia::buildStaticLibTool() const {
return new tools::fuchsia::StaticLibTool(*this);
}
-ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
- const ArgList &Args) const {
+ToolChain::RuntimeLibType
+Fuchsia::GetRuntimeLibType(const ArgList &Args) const {
if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
StringRef Value = A->getValue();
if (Value != "compiler-rt")
@@ -363,13 +364,12 @@ ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
return ToolChain::RLT_CompilerRT;
}
-ToolChain::CXXStdlibType
-Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
+ToolChain::CXXStdlibType Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
StringRef Value = A->getValue();
if (Value != "libc++")
getDriver().Diag(diag::err_drv_invalid_stdlib_name)
- << A->getAsString(Args);
+ << A->getAsString(Args);
}
return ToolChain::CST_Libcxx;
diff --git a/clang/test/Driver/fuchsia.c b/clang/test/Driver/fuchsia.c
index 83dee16981690a..cf92f85040901c 100644
--- a/clang/test/Driver/fuchsia.c
+++ b/clang/test/Driver/fuchsia.c
@@ -297,3 +297,9 @@
// RUN: %clang --target=riscv64-unknown-fuchsia -mno-relax -### %s 2>&1 \
// RUN: | FileCheck -check-prefix=RISCV64-FLAGS %s
// RISCV64-FLAGS: "-X" "--no-relax"
+
+// RUN: %clang -### %s --target=x86_64-unknown-fuchsia 2>&1 \
+// RUN: -nostdlib -nolibc \
+// RUN: | FileCheck %s -check-prefix=CHECK-NOSTDLIB-NOLIBC
+// CHECK-NOSTDLIB-NOLIBC-NOT: "warning:"
+// CHECK-NOSTDLIB-NOLIBC-NOT: "error:"
|
petrhosek
approved these changes
Dec 4, 2024
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There should not be an error or warning reported for using
redundant options to control what goes into the link. For
example, -nolibc -nostdlib.