From c2f9ea78473caa319380f49287da512ba96c60e8 Mon Sep 17 00:00:00 2001
From: Chandler Carruth <chandlerc@gmail.com>
Date: Tue, 2 Dec 2014 00:53:20 +0000
Subject: [PATCH] Add a test that ensures the Clang driver behaves itself when
 the PATH environment variable is changed to strange things out from under it.
 Prior to r223099 in LLVM, these test cases would crash in various ways
 (assert fails, stack exhaustion, etc.).

llvm-svn: 223100
---
 clang/test/Driver/env.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 clang/test/Driver/env.c

diff --git a/clang/test/Driver/env.c b/clang/test/Driver/env.c
new file mode 100644
index 0000000..1d28fc0
--- /dev/null
+++ b/clang/test/Driver/env.c
@@ -0,0 +1,25 @@
+// These tests try to ensure that the driver operates reasonably when run with
+// a strange environment. Unfortunately, it requires a normal shell and the
+// 'env' command.
+//
+// REQUIRES: shell
+//
+// The PATH variable is heavily used when trying to find a linker.
+// RUN: env -u PATH -- %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     --target=i386-unknown-linux \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-32 %s
+//
+// RUN: env PATH="" %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     --target=i386-unknown-linux \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-32 %s
+//
+// CHECK-LD-32-NOT: warning:
+// CHECK-LD-32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
+// CHECK-LD-32: "{{.*}}/usr/lib/gcc/i386-unknown-linux/4.6.0{{/|\\\\}}crtbegin.o"
+// CHECK-LD-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/4.6.0"
+// CHECK-LD-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/4.6.0/../../../../i386-unknown-linux/lib"
+// CHECK-LD-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/4.6.0/../../.."
+// CHECK-LD-32: "-L[[SYSROOT]]/lib"
+// CHECK-LD-32: "-L[[SYSROOT]]/usr/lib"
-- 
2.7.4