Implement a function to print a warning if bytecode output is to be sent to
a terminal/console.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19237 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/SystemUtils.cpp b/lib/Support/SystemUtils.cpp
index 4213b84..dfb8775 100644
--- a/lib/Support/SystemUtils.cpp
+++ b/lib/Support/SystemUtils.cpp
@@ -14,20 +14,22 @@
#include "llvm/Support/SystemUtils.h"
#include "llvm/System/Program.h"
+#include "llvm/System/Process.h"
+#include <iostream>
using namespace llvm;
-/// isStandardOutAConsole - Return true if we can tell that the standard output
-/// stream goes to a terminal window or console.
-bool llvm::isStandardOutAConsole() {
-#if HAVE_ISATTY
- return isatty(1);
-#endif
- // If we don't have isatty, just return false.
+bool llvm::CheckBytecodeOutputToConsole(std::ostream* stream_to_check) {
+ if (stream_to_check == &std::cout && sys::Process::StandardOutIsDisplayed()) {
+ std::cerr << "WARNING: You're attempting to print out a bytecode file.\n";
+ std::cerr << "This is inadvisable as it may cause display problems. If\n";
+ std::cerr << "you REALLY want to taste LLVM bytecode first-hand, you can\n";
+ std::cerr << "force output with the `-f' option.\n\n";
+ return true;
+ }
return false;
}
-
/// FindExecutable - Find a named executable, giving the argv[0] of program
/// being executed. This allows us to find another LLVM tool if it is built
/// into the same directory, but that directory is neither the current