[clang][Driver] Prefer non-Linux emulations for baremetal Arm/AArch64 targets

I'm unsure if there is an official source for which targets use/support which
emulations, but for the baremetal GNU Arm/AArch64 toolchains or binutils
builds I've tried to use, GNU ld either did not support the Linux emulations
(resulting in errors unless overriding the emulation) or the Linux emulations
were supported but GCC passed the non-Linux emulations by default.

These emulations all seem to be accepted by lld as well, so try to align with
what it seems GCC is doing and prefer the non-Linux emulations for baremetal
Arm/AArch64 targets.

Author: jonathonpenix

clang/lib/Driver/ToolChains/Arch/AArch64.cpp

@@ -467,3 +467,18 @@ void aarch64::setPAuthABIInTriple(const Driver &D, const ArgList &Args,
     break;
   }
 }
+
+/// Is the triple {aarch64.aarch64_be}-none-elf?
+bool aarch64::isAArch64BareMetal(const llvm::Triple &Triple) {
+  if (Triple.getArch() != llvm::Triple::aarch64 &&
+      Triple.getArch() != llvm::Triple::aarch64_be)
+    return false;
+
+  if (Triple.getVendor() != llvm::Triple::UnknownVendor)
+    return false;
+
+  if (Triple.getOS() != llvm::Triple::UnknownOS)
+    return false;
+
+  return Triple.getEnvironmentName() == "elf";
+}

clang/lib/Driver/ToolChains/Arch/AArch64.h

@@ -30,6 +30,7 @@ std::string getAArch64TargetCPU(const llvm::opt::ArgList &Args,
 
 void setPAuthABIInTriple(const Driver &D, const llvm::opt::ArgList &Args,
                          llvm::Triple &triple);
+bool isAArch64BareMetal(const llvm::Triple &Triple);
 
 } // end namespace aarch64
 } // end namespace target

clang/lib/Driver/ToolChains/Arch/RISCV.cpp

@@ -364,3 +364,16 @@ std::string riscv::getRISCVTargetCPU(const llvm::opt::ArgList &Args,
 
   return Triple.isRISCV64() ? "generic-rv64" : "generic-rv32";
 }
+
+bool riscv::isRISCVBareMetal(const llvm::Triple &Triple) {
+  if (!Triple.isRISCV())
+    return false;
+
+  if (Triple.getVendor() != llvm::Triple::UnknownVendor)
+    return false;
+
+  if (Triple.getOS() != llvm::Triple::UnknownOS)
+    return false;
+
+  return Triple.getEnvironmentName() == "elf";
+}

clang/lib/Driver/ToolChains/Arch/RISCV.h

@@ -28,6 +28,7 @@ std::string getRISCVArch(const llvm::opt::ArgList &Args,
                          const llvm::Triple &Triple);
 std::string getRISCVTargetCPU(const llvm::opt::ArgList &Args,
                               const llvm::Triple &Triple);
+bool isRISCVBareMetal(const llvm::Triple &Triple);
 } // end namespace riscv
 } // namespace tools
 } // end namespace driver

clang/lib/Driver/ToolChains/BareMetal.cpp

@@ -12,6 +12,7 @@
 #include "clang/Driver/CommonArgs.h"
 #include "clang/Driver/InputInfo.h"
 
+#include "Arch/AArch64.h"
 #include "Arch/ARM.h"
 #include "Arch/RISCV.h"
 #include "clang/Driver/Compilation.h"
@@ -31,34 +32,6 @@ using namespace clang::driver;
 using namespace clang::driver::tools;
 using namespace clang::driver::toolchains;
 
-/// Is the triple {aarch64.aarch64_be}-none-elf?
-static bool isAArch64BareMetal(const llvm::Triple &Triple) {
-  if (Triple.getArch() != llvm::Triple::aarch64 &&
-      Triple.getArch() != llvm::Triple::aarch64_be)
-    return false;
-
-  if (Triple.getVendor() != llvm::Triple::UnknownVendor)
-    return false;
-
-  if (Triple.getOS() != llvm::Triple::UnknownOS)
-    return false;
-
-  return Triple.getEnvironmentName() == "elf";
-}
-
-static bool isRISCVBareMetal(const llvm::Triple &Triple) {
-  if (!Triple.isRISCV())
-    return false;
-
-  if (Triple.getVendor() != llvm::Triple::UnknownVendor)
-    return false;
-
-  if (Triple.getOS() != llvm::Triple::UnknownOS)
-    return false;
-
-  return Triple.getEnvironmentName() == "elf";
-}
-
 /// Is the triple powerpc[64][le]-*-none-eabi?
 static bool isPPCBareMetal(const llvm::Triple &Triple) {
   return Triple.isPPC() && Triple.getOS() == llvm::Triple::UnknownOS &&
@@ -235,7 +208,7 @@ BareMetal::BareMetal(const Driver &D, const llvm::Triple &Triple,
   IsGCCInstallationValid = initGCCInstallation(Triple, Args);
   std::string ComputedSysRoot = computeSysRoot();
   if (IsGCCInstallationValid) {
-    if (!isRISCVBareMetal(Triple))
+    if (!riscv::isRISCVBareMetal(Triple))
       D.Diag(clang::diag::warn_drv_multilib_not_available_for_target);
 
     Multilibs = GCCInstallation.getMultilibs();
@@ -354,7 +327,8 @@ void BareMetal::findMultilibs(const Driver &D, const llvm::Triple &Triple,
     Multilibs = Result.Multilibs;
     MultilibMacroDefines.append(CustomFlagMacroDefines.begin(),
                                 CustomFlagMacroDefines.end());
-  } else if (isRISCVBareMetal(Triple) && !detectGCCToolchainAdjacent(D)) {
+  } else if (riscv::isRISCVBareMetal(Triple) &&
+             !detectGCCToolchainAdjacent(D)) {
     if (findRISCVMultilibs(D, Triple, Args, Result)) {
       SelectedMultilibs = Result.SelectedMultilibs;
       Multilibs = Result.Multilibs;
@@ -363,8 +337,9 @@ void BareMetal::findMultilibs(const Driver &D, const llvm::Triple &Triple,
 }
 
 bool BareMetal::handlesTarget(const llvm::Triple &Triple) {
-  return arm::isARMEABIBareMetal(Triple) || isAArch64BareMetal(Triple) ||
-         isRISCVBareMetal(Triple) || isPPCBareMetal(Triple);
+  return arm::isARMEABIBareMetal(Triple) ||
+         aarch64::isAArch64BareMetal(Triple) ||
+         riscv::isRISCVBareMetal(Triple) || isPPCBareMetal(Triple);
 }
 
 Tool *BareMetal::buildLinker() const {

clang/lib/Driver/ToolChains/CommonArgs.cpp

@@ -547,15 +547,22 @@ const char *tools::getLDMOption(const llvm::Triple &T, const ArgList &Args) {
   case llvm::Triple::aarch64:
     if (T.isOSManagarm())
       return "aarch64managarm";
+    else if (aarch64::isAArch64BareMetal(T))
+      return "aarch64elf";
     return "aarch64linux";
   case llvm::Triple::aarch64_be:
+    if (aarch64::isAArch64BareMetal(T))
+      return "aarch64elfb";
     return "aarch64linuxb";
   case llvm::Triple::arm:
   case llvm::Triple::thumb:
   case llvm::Triple::armeb:
-  case llvm::Triple::thumbeb:
-    return tools::arm::isARMBigEndian(T, Args) ? "armelfb_linux_eabi"
-                                               : "armelf_linux_eabi";
+  case llvm::Triple::thumbeb: {
+    bool IsBigEndian = tools::arm::isARMBigEndian(T, Args);
+    if (arm::isARMEABIBareMetal(T))
+      return IsBigEndian ? "armelfb" : "armelf";
+    return IsBigEndian ? "armelfb_linux_eabi" : "armelf_linux_eabi";
+  }
   case llvm::Triple::m68k:
     return "m68kelf";
   case llvm::Triple::ppc:

clang/test/Driver/aarch64-toolchain.c

@@ -11,7 +11,7 @@
 // LLD-AARCH64-BAREMETAL: "-isysroot" "{{.*}}Inputs/basic_aarch64_gcc_tree/aarch64-none-elf"
 // LLD-AARCH64-BAREMETAL: "-internal-isystem" "{{.*}}Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/include"
 // LLD-AARCH64-BAREMETAL: "{{.*}}/Inputs/lld/ld.lld"
-// LLD-AARCH64-BAREMETAL: "-Bstatic" "-m" "aarch64linux" "-EL"
+// LLD-AARCH64-BAREMETAL: "-Bstatic" "-m" "aarch64elf" "-EL"
 // LLD-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/lib/crt0.o"
 // LLD-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/crtbegin.o"
 // LLD-AARCH64-BAREMETAL: "-L{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1"
@@ -30,7 +30,7 @@
 // C-AARCH64-BAREMETAL: "-internal-isystem" "{{.*}}Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/include"
 // C-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../bin/aarch64-none-elf-ld"
 // C-AARCH64-BAREMETAL: "--sysroot={{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf"
-// C-AARCH64-BAREMETAL: "-Bstatic" "-m" "aarch64linux" "-EL"
+// C-AARCH64-BAREMETAL: "-Bstatic" "-m" "aarch64elf" "-EL"
 // C-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/lib/crt0.o"
 // C-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/crtbegin.o"
 // C-AARCH64-BAREMETAL: "-L{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1"
@@ -47,7 +47,7 @@
 // C-AARCH64-BAREMETAL-NOSYSROOT: "-cc1" "-triple" "aarch64-unknown-none-elf"
 // C-AARCH64-BAREMETAL-NOSYSROOT: "-internal-isystem" "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/include"
 // C-AARCH64-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../bin/aarch64-none-elf-ld"
-// C-AARCH64-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "aarch64linux" "-EL"
+// C-AARCH64-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "aarch64elf" "-EL"
 // C-AARCH64-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/lib/crt0.o"
 // C-AARCH64-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/crtbegin.o"
 // C-AARCH64-BAREMETAL-NOSYSROOT: "-L{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1"
@@ -67,7 +67,7 @@
 // CXX-AARCH64-BAREMETAL: "-internal-isystem" "{{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/include"
 // CXX-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../bin/aarch64-none-elf-ld"
 // CXX-AARCH64-BAREMETAL: "--sysroot={{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf"
-// CXX-AARCH64-BAREMETAL: "-Bstatic" "-m" "aarch64linux" "-EL"
+// CXX-AARCH64-BAREMETAL: "-Bstatic" "-m" "aarch64elf" "-EL"
 // CXX-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/lib/crt0.o"
 // CXX-AARCH64-BAREMETAL: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/crtbegin.o"
 // CXX-AARCH64-BAREMETAL: "-L{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1"
@@ -86,7 +86,7 @@
 // CXX-AARCH64-BAREMETAL-NOSYSROOT: "-internal-isystem" "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/include/c++/8.2.1"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT: "-internal-isystem" "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/include"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../bin/aarch64-none-elf-ld"
-// CXX-AARCH64-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "aarch64linux" "-EL"
+// CXX-AARCH64-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "aarch64elf" "-EL"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/lib/crt0.o"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/crtbegin.o"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT: "-L{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1"
@@ -105,7 +105,7 @@
 // CXX-AARCH64-BAREMETAL-LIBCXX: "-internal-isystem" "{{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/include"
 // CXX-AARCH64-BAREMETAL-LIBCXX: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../bin/aarch64-none-elf-ld"
 // CXX-AARCH64-BAREMETAL-LIBCXX: "--sysroot={{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf"
-// CXX-AARCH64-BAREMETAL-LIBCXX: "-Bstatic" "-m" "aarch64linux" "-EL"
+// CXX-AARCH64-BAREMETAL-LIBCXX: "-Bstatic" "-m" "aarch64elf" "-EL"
 // CXX-AARCH64-BAREMETAL-LIBCXX: "{{.*}}/Inputs/basic_aarch64_gcc_tree/aarch64-none-elf/lib/crt0.o"
 // CXX-AARCH64-BAREMETAL-LIBCXX: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/crtbegin.o"
 // CXX-AARCH64-BAREMETAL-LIBCXX: "-L{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1"
@@ -122,7 +122,7 @@
 // CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "-internal-isystem" "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/include/c++/v1"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "-internal-isystem" "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/include"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../bin/aarch64-none-elf-ld"
-// CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "-Bstatic" "-m" "aarch64linux" "-EL"
+// CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "-Bstatic" "-m" "aarch64elf" "-EL"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/../../../../aarch64-none-elf/lib/crt0.o"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1/crtbegin.o"
 // CXX-AARCH64-BAREMETAL-NOSYSROOT-LIBCXX: "-L{{.*}}/Inputs/basic_aarch64_gcc_tree/lib/gcc/aarch64-none-elf/8.2.1"

clang/test/Driver/arm-toolchain.c

@@ -10,7 +10,7 @@
 // LLD-ARM-BAREMETAL: "-isysroot" "{{.*}}Inputs/basic_arm_gcc_tree/armv6m-none-eabi"
 // LLD-ARM-BAREMETAL: "-internal-isystem" "{{.*}}Inputs/basic_arm_gcc_tree/armv6m-none-eabi/include"
 // LLD-ARM-BAREMETAL: "{{.*}}/Inputs/lld/ld.lld"
-// LLD-ARM-BAREMETAL: "-Bstatic" "-m" "armelf_linux_eabi" "-EL"
+// LLD-ARM-BAREMETAL: "-Bstatic" "-m" "armelf" "-EL"
 // LLD-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi/lib/crt0.o"
 // LLD-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/crtbegin.o"
 // LLD-ARM-BAREMETAL: "-L{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1"
@@ -29,7 +29,7 @@
 // C-ARM-BAREMETAL: "-internal-isystem" "{{.*}}Inputs/basic_arm_gcc_tree/armv6m-none-eabi/include"
 // C-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../bin/armv6m-none-eabi-ld"
 // C-ARM-BAREMETAL: "--sysroot={{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi"
-// C-ARM-BAREMETAL: "-Bstatic" "-m" "armelf_linux_eabi" "-EL"
+// C-ARM-BAREMETAL: "-Bstatic" "-m" "armelf" "-EL"
 // C-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi/lib/crt0.o"
 // C-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/crtbegin.o"
 // C-ARM-BAREMETAL: "-L{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1"
@@ -46,7 +46,7 @@
 // C-ARM-BAREMETAL-NOSYSROOT: "-cc1" "-triple" "thumbv6m-unknown-none-eabi"
 // C-ARM-BAREMETAL-NOSYSROOT: "-internal-isystem" "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/include"
 // C-ARM-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../bin/armv6m-none-eabi-ld"
-// C-ARM-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "armelf_linux_eabi" "-EL"
+// C-ARM-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "armelf" "-EL"
 // C-ARM-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/lib/crt0.o"
 // C-ARM-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/crtbegin.o"
 // C-ARM-BAREMETAL-NOSYSROOT: "-L{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1"
@@ -67,7 +67,7 @@
 // CXX-ARM-BAREMETAL: "-internal-isystem" "{{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi/include"
 // CXX-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../bin/armv6m-none-eabi-ld"
 // CXX-ARM-BAREMETAL: "--sysroot={{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi"
-// CXX-ARM-BAREMETAL: "-Bstatic" "-m" "armelf_linux_eabi" "-EL"
+// CXX-ARM-BAREMETAL: "-Bstatic" "-m" "armelf" "-EL"
 // CXX-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi/lib/crt0.o"
 // CXX-ARM-BAREMETAL: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/crtbegin.o"
 // CXX-ARM-BAREMETAL: "-L{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1"
@@ -87,7 +87,7 @@
 // CXX-ARM-BAREMETAL-NOSYSROOT: "-internal-isystem" "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/include/c++/8.2.1"
 // CXX-ARM-BAREMETAL-NOSYSROOT: "-internal-isystem" "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/include"
 // CXX-ARM-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../bin/armv6m-none-eabi-ld"
-// CXX-ARM-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "armelf_linux_eabi" "-EL"
+// CXX-ARM-BAREMETAL-NOSYSROOT: "-Bstatic" "-m" "armelf" "-EL"
 // CXX-ARM-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/lib/crt0.o"
 // CXX-ARM-BAREMETAL-NOSYSROOT: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/crtbegin.o"
 // CXX-ARM-BAREMETAL-NOSYSROOT: "-L{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1"
@@ -106,7 +106,7 @@
 // CXX-ARM-BAREMETAL-LIBCXX: "-internal-isystem" "{{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi/include"
 // CXX-ARM-BAREMETAL-LIBCXX: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../bin/armv6m-none-eabi-ld"
 // CXX-ARM-BAREMETAL-LIBCXX: "--sysroot={{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi"
-// CXX-ARM-BAREMETAL-LIBCXX: "-Bstatic" "-m" "armelf_linux_eabi" "-EL"
+// CXX-ARM-BAREMETAL-LIBCXX: "-Bstatic" "-m" "armelf" "-EL"
 // CXX-ARM-BAREMETAL-LIBCXX: "{{.*}}/Inputs/basic_arm_gcc_tree/armv6m-none-eabi/lib/crt0.o"
 // CXX-ARM-BAREMETAL-LIBCXX: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/crtbegin.o"
 // CXX-ARM-BAREMETAL-LIBCXX: "-L{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1"
@@ -123,7 +123,7 @@
 // CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "-internal-isystem" "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/include/c++/v1"
 // CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "-internal-isystem" "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/include"
 // CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../bin/armv6m-none-eabi-ld"
-// CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "-Bstatic" "-m" "armelf_linux_eabi" "-EL"
+// CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "-Bstatic" "-m" "armelf" "-EL"
 // CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/../../../../armv6m-none-eabi/lib/crt0.o"
 // CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1/crtbegin.o"
 // CXX-ARM-BAREMETAL-NOSYSROOT-LIBCXX: "-L{{.*}}/Inputs/basic_arm_gcc_tree/lib/gcc/armv6m-none-eabi/8.2.1"