Fix an issue that Duncan discovered on a specific (no longer current)
version of Ubuntu. It has a very broken multiarch configuration, and so
we need special logic to handle it correctly. Fixing and testing this
uncovered a few other trivial issues with the logic that are fixed as
well.
I added tests to cover this as it is hard to notice if you install
recent versions of the OS.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144165 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/linux-header-search.cpp b/test/Driver/linux-header-search.cpp
new file mode 100644
index 0000000..a2f486e
--- /dev/null
+++ b/test/Driver/linux-header-search.cpp
@@ -0,0 +1,17 @@
+// General tests that the header search paths detected by the driver and passed
+// to CC1 are sane.
+//
+// Test a very broken version of multiarch that shipped in Ubuntu 11.04.
+// RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
+// RUN: -ccc-host-triple i386-unknown-linux \
+// RUN: --sysroot=%S/Inputs/ubuntu_11.04_multiarch_tree \
+// RUN: | FileCheck --check-prefix=CHECK-UBUNTU-11-04 %s
+// CHECK-UBUNTU-11-04: "{{.*}}clang{{.*}}" "-cc1"
+// CHECK-UBUNTU-11-04: "-isysroot" "[[SYSROOT:[^"]+]]"
+// CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5"
+// CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5/i686-linux-gnu"
+// CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5/backward"
+// CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
+// CHECK-UBUNTU-11-04: "-internal-isystem" "{{.*}}/lib/clang/{{[0-9]\.[0-9]}}/include"
+// CHECK-UBUNTU-11-04: "-internal-externc-isystem" "[[SYSROOT]]/include"
+// CHECK-UBUNTU-11-04: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"