Adapt OptTable::PrintHelp change in D51009

Summary: Before, OptTable::PrintHelp append "[options] <inputs>" to its parameter `Help`. It is more flexible to change its semantic to `Usage` and let user customize the usage line.

Reviewers: rupprecht, ruiu, espindola

Reviewed By: rupprecht

Subscribers: emaste, sbc100, arichardson, aheejin, llvm-commits

Differential Revision: https://reviews.llvm.org/D53054

llvm-svn: 344099

1 files changed, 7 insertions, 3 deletions

diff --git a/lld/lib/Driver/DarwinLdDriver.cpp b/lld/lib/Driver/DarwinLdDriver.cpp
index 289b3007b265..7521d6e57a24 100644
--- a/lld/lib/Driver/DarwinLdDriver.cpp
+++ b/lld/lib/Driver/DarwinLdDriver.cpp
@@ -44,6 +44,7 @@
 #include "llvm/Support/Error.h"
 #include "llvm/Support/ErrorOr.h"
 #include "llvm/Support/Format.h"
+#include "llvm/Support/FormatVariadic.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
@@ -382,10 +383,13 @@ bool parse(llvm::ArrayRef<const char *> args, MachOLinkingContext &ctx) {
     if (arch == MachOLinkingContext::arch_unknown &&
         !parsedArgs.getLastArg(OPT_test_file_usage)) {
       // If no -arch and no options at all, print usage message.
-      if (parsedArgs.size() == 0)
-        table.PrintHelp(llvm::outs(), args[0], "LLVM Linker", false);
-      else
+      if (parsedArgs.size() == 0) {
+        std::string Usage =
+            llvm::formatv("{0} [options] file...", args[0]).str();
+        table.PrintHelp(llvm::outs(), Usage.c_str(), "LLVM Linker", false);
+      } else {
         error("-arch not specified and could not be inferred");
+      }
       return false;
     }
   }