[CMake] Introduce LLVM_TARGET_TRIPLE_ENV as an option to override LLVM_DEFAULT_TARGET...

[android-x86/external-llvm.git] / lib / Support / Unix / Host.inc

diff --git a/lib/Support/Unix/Host.inc b/lib/Support/Unix/Host.inc
index 4572171..0ba6a25 100644 (file)
--- a/lib/Support/Unix/Host.inc
+++ b/lib/Support/Unix/Host.inc
@@ -45,5 +45,11 @@ std::string sys::getDefaultTargetTriple() {
     TargetTripleString += getOSVersion();
   }
 
+  // Override the default target with an environment variable named by LLVM_TARGET_TRIPLE_ENV.
+#if defined(LLVM_TARGET_TRIPLE_ENV)
+  if (const char *EnvTriple = std::getenv(LLVM_TARGET_TRIPLE_ENV))
+    TargetTripleString = EnvTriple;
+#endif
+
   return Triple::normalize(TargetTripleString);
 }