[lld] r334024 - Do not show unrelated "-m is missing" error message.

[Rui Ueyama via llvm-commits]

Author: ruiu
Date: Tue Jun  5 09:13:40 2018
New Revision: 334024

URL: http://llvm.org/viewvc/llvm-project?rev=334024&view=rev
Log:
Do not show unrelated "-m is missing" error message.

Previously, "-m is missing" error message is shown if you pass a
nonexistent file or don't pass any file at all to lld, as shown below:

  $ ld.lld nonexistent.o
  ld.lld: error: cannot open nonexistent.o: No such file or directory
  ld.lld: error: target emulation unknown: -m or at least one .o file required

This patch eliminates the second error message because it's not related
and even inaccurate (you passed a .o file though it didn't exist).

Modified:
    lld/trunk/ELF/Driver.cpp

Modified: lld/trunk/ELF/Driver.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/Driver.cpp?rev=334024&r1=334023&r2=334024&view=diff
==============================================================================
--- lld/trunk/ELF/Driver.cpp (original)
+++ lld/trunk/ELF/Driver.cpp Tue Jun  5 09:13:40 2018
@@ -382,6 +382,9 @@ void LinkerDriver::main(ArrayRef<const c
   readConfigs(Args);
   initLLVM();
   createFiles(Args);
+  if (errorCount())
+    return;
+
   inferMachineType();
   setConfigs(Args);
   checkOptions(Args);