commit bc86a99f780fce86a2a214d896f5bc1afb1c9b74
author Petr Hosek <phosek@chromium.org> Thu Aug 16 00:22:03 2018 +0000
committer Petr Hosek <phosek@chromium.org> Thu Aug 16 00:22:03 2018 +0000
tree 4c0a46feafbb26c994cc0210144ce201a378a75b
parent 8a5d7a2784b03bc9a409cb8378ec5d26863dc38d

[Driver] -print-target-triple and -print-effective-triple options

These can be used to print Clang target and effective triple.

Differential Revision: https://reviews.llvm.org/D50755

llvm-svn: 339834

clang/include/clang/Driver/Options.td

diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 601aa87..1878184 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -2348,6 +2348,10 @@
 def print_multi_lib : Flag<["-", "--"], "print-multi-lib">;
 def print_multi_os_directory : Flag<["-", "--"], "print-multi-os-directory">,
   Flags<[Unsupported]>;
+def print_target_triple : Flag<["-", "--"], "print-target-triple">,
+  HelpText<"Print the normalized target triple">;
+def print_effective_triple : Flag<["-", "--"], "print-effective-triple">,
+  HelpText<"Print the effective target triple">;
 def print_prog_name_EQ : Joined<["-", "--"], "print-prog-name=">,
   HelpText<"Print the full program path of <name>">, MetaVarName<"<name>">;
 def print_resource_dir : Flag<["-", "--"], "print-resource-dir">,

clang/lib/Driver/Driver.cpp

diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 952a716..350ee0e3 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -1672,6 +1672,18 @@
     }
     return false;
   }
+
+  if (C.getArgs().hasArg(options::OPT_print_target_triple)) {
+    llvm::outs() << TC.getTripleString() << "\n";
+    return false;
+  }
+
+  if (C.getArgs().hasArg(options::OPT_print_effective_triple)) {
+    const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
+    llvm::outs() << Triple.getTriple() << "\n";
+    return false;
+  }
+
   return true;
 }
 

clang/test/Driver/print-effective-triple.c

diff --git a/clang/test/Driver/print-effective-triple.c b/clang/test/Driver/print-effective-triple.c
new file mode 100644
index 0000000..65b3874
--- /dev/null
+++ b/clang/test/Driver/print-effective-triple.c
@@ -0,0 +1,6 @@
+// Test that -print-target-triple prints correct triple.
+
+// RUN: %clang -print-effective-triple 2>&1 \
+// RUN:     --target=thumb-linux-gnu \
+// RUN:   | FileCheck %s
+// CHECK: armv4t-unknown-linux-gnu

clang/test/Driver/print-target-triple.c

diff --git a/clang/test/Driver/print-target-triple.c b/clang/test/Driver/print-target-triple.c
new file mode 100644
index 0000000..70b2493
--- /dev/null
+++ b/clang/test/Driver/print-target-triple.c
@@ -0,0 +1,6 @@
+// Test that -print-target-triple prints correct triple.
+
+// RUN: %clang -print-target-triple 2>&1 \
+// RUN:     --target=x86_64-linux-gnu \
+// RUN:   | FileCheck %s
+// CHECK: x86_64-unknown-linux-gnu