From: Hans Wennborg <hans@hanshq.net>
Date: Wed, 19 Jul 2017 15:03:38 +0000 (+0000)
Subject: Defeat a GCC -Wunused-result warning
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=db3d5211c6552d2863a4936ac79b0495543f0f92;p=llvm

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308483 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/ErrorHandling.cpp b/lib/Support/ErrorHandling.cpp
index 2fd4f3ea0d4..fb8ae4c1cd5 100644
--- a/lib/Support/ErrorHandling.cpp
+++ b/lib/Support/ErrorHandling.cpp
@@ -169,7 +169,8 @@ void llvm::report_bad_alloc_error(const char *Reason, bool GenCrashDiag) {
   // 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
 }