[llvm] r308483 - Defeat a GCC -Wunused-result warning

[Hans Wennborg via llvm-commits]

Author: hans
Date: Wed Jul 19 08:03:38 2017
New Revision: 308483

URL: http://llvm.org/viewvc/llvm-project?rev=308483&view=rev
Log:
Defeat a GCC -Wunused-result warning

It was warning like:

../llvm-project/llvm/lib/Support/ErrorHandling.cpp:172:51: warning:
ignoring return value of ‘ssize_t write(int, const void*, size_t)’,
         declared with attribute warn_unused_result [-Wunused-result]
            (void)::write(2, OOMMessage, strlen(OOMMessage));

Work around the warning by storing the return value in a variable and
casting that to void instead. We already did this for the other write()
call in this file.

Modified:
    llvm/trunk/lib/Support/ErrorHandling.cpp

Modified: llvm/trunk/lib/Support/ErrorHandling.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/ErrorHandling.cpp?rev=308483&r1=308482&r2=308483&view=diff
==============================================================================
--- llvm/trunk/lib/Support/ErrorHandling.cpp (original)
+++ llvm/trunk/lib/Support/ErrorHandling.cpp Wed Jul 19 08:03:38 2017
@@ -169,7 +169,8 @@ void llvm::report_bad_alloc_error(const
   // Don't call the normal error handler. It may allocate memory. Directly write
   // an OOM to stderr and abort.
   char OOMMessage[] = "LLVM ERROR: out of memory\n";
-  (void)::write(2, OOMMessage, strlen(OOMMessage));
+  ssize_t written = ::write(2, OOMMessage, strlen(OOMMessage));
+  (void)written;
   abort();
 #endif
 }