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

diff --git a/clang/test/Driver/env.c b/clang/test/Driver/env.c
new file mode 100644 (file)
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"