Don't defer to the GCC driver for linking arm-baremetal
Also comes with a cmake cache for building the runtime bits:
$ cmake <normal cmake flags> \
-DBAREMETAL_ARMV6M_SYSROOT=/path/to/sysroot \
-DBAREMETAL_ARMV7M_SYSROOT=/path/to/sysroot \
-DBAREMETAL_ARMV7EM_SYSROOT=/path/to/sysroot \
-C /path/to/clang/cmake/caches/BaremetalARM.cmake \
/path/to/llvm
https://reviews.llvm.org/D33259
llvm-svn: 303873
diff --git a/clang/test/Driver/baremetal.cpp b/clang/test/Driver/baremetal.cpp
new file mode 100644
index 0000000..0d34a5e
--- /dev/null
+++ b/clang/test/Driver/baremetal.cpp
@@ -0,0 +1,77 @@
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN: -target armv6m-none-eabi \
+// RUN: -T semihosted.lds \
+// RUN: -L some/directory/user/asked/for \
+// RUN: --sysroot=%S/Inputs/baremetal_arm \
+// RUN: | FileCheck --check-prefix=CHECK-V6M-C %s
+// CHECK-V6M-C: "[[PREFIX_DIR:.*]]/bin/clang" "-cc1" "-triple" "thumbv6m-none--eabi"
+// CHECK-V6M-C-SAME: "-resource-dir" "[[PREFIX_DIR]]/lib/clang/[[VERSION:[^"]*]]"
+// CHECK-V6M-C-SAME: "-isysroot" "[[SYSROOT:[^"]*]]"
+// CHECK-V6M-C-SAME: "-internal-isystem" "[[SYSROOT]]/include/c++/v1"
+// CHECk-V6M-C-SAME: "-internal-isystem" "[[SYSROOT]]/include"
+// CHECK-V6M-C-SAME: "-x" "c++" "{{.*}}baremetal.cpp"
+// CHECK-V6M-C-NEXT: "[[PREFIX_DIR:.*]]/bin/ld.lld" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-C-SAME: "-L[[PREFIX_DIR]]/lib/clang/[[VERSION]]/lib/baremetal"
+// CHECK-V6M-C-SAME: "-T" "semihosted.lds" "-Lsome/directory/user/asked/for"
+// CHECK-V6M-C-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
+// CHECK-V6M-C-SAME: "-o" "{{.*}}.o"
+
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN: -target armv6m-none-eabi \
+// RUN: -nostdlibinc -nobuiltininc \
+// RUN: --sysroot=%S/Inputs/baremetal_arm \
+// RUN: | FileCheck --check-prefix=CHECK-V6M-LIBINC %s
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN: -target armv6m-none-eabi \
+// RUN: -nostdinc \
+// RUN: --sysroot=%S/Inputs/baremetal_arm \
+// RUN: | FileCheck --check-prefix=CHECK-V6M-LIBINC %s
+// CHECK-V6M-LIBINC-NOT: "-internal-isystem"
+
+// RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN: -target armv6m-none-eabi \
+// RUN: --sysroot=%S/Inputs/baremetal_arm \
+// RUN: | FileCheck --check-prefix=CHECK-V6M-DEFAULTCXX %s
+// CHECK-V6M-DEFAULTCXX: "[[PREFIX_DIR:.*]]/bin/ld.lld" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-DEFAULTCXX-SAME: "-L[[PREFIX_DIR]]/lib/clang/{{.*}}/lib/baremetal"
+// CHECK-V6M-DEFAULTCXX-SAME: "-lc++" "-lc++abi" "-lunwind"
+// CHECK-V6M-DEFAULTCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
+// CHECK-V6M-DEFAULTCXX-SAME: "-o" "{{.*}}.o"
+
+// RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN: -target armv6m-none-eabi \
+// RUN: --sysroot=%S/Inputs/baremetal_arm \
+// RUN: -stdlib=libc++ \
+// RUN: | FileCheck --check-prefix=CHECK-V6M-LIBCXX %s
+// CHECK-V6M-LIBCXX-NOT: "-internal-isystem" "{{[^"]+}}/include/c++/{{[^v].*}}"
+// CHECK-V6M-LIBCXX: "-internal-isystem" "{{[^"]+}}/include/c++/v1"
+// CHECK-V6M-LIBCXX: "[[PREFIX_DIR:.*]]/bin/ld.lld" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-LIBCXX-SAME: "-L[[PREFIX_DIR]]/lib/clang/{{.*}}/lib/baremetal"
+// CHECK-V6M-LIBCXX-SAME: "-lc++" "-lc++abi" "-lunwind"
+// CHECK-V6M-LIBCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
+// CHECK-V6M-LIBCXX-SAME: "-o" "{{.*}}.o"
+
+// RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN: -target armv6m-none-eabi \
+// RUN: --sysroot=%S/Inputs/baremetal_arm \
+// RUN: -stdlib=libstdc++ \
+// RUN: | FileCheck --check-prefix=CHECK-V6M-LIBSTDCXX %s
+// CHECK-V6M-LIBSTDCXX-NOT: "-internal-isystem" "{{[^"]+}}/include/c++/v1"
+// CHECK-V6M-LIBSTDCXX: "-internal-isystem" "{{[^"]+}}/include/c++/6.0.0"
+// CHECK-V6M-LIBSTDCXX: "[[PREFIX_DIR:.*]]/bin/ld.lld" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-LIBSTDCXX-SAME: "-L[[PREFIX_DIR]]/lib/clang/{{.*}}/lib/baremetal"
+// CHECK-V6M-LIBSTDCXX-SAME: "-lstdc++" "-lsupc++" "-lunwind"
+// CHECK-V6M-LIBSTDCXX-SAME: "-lc" "-lm" "-lclang_rt.builtins-armv6m.a"
+// CHECK-V6M-LIBSTDCXX-SAME: "-o" "{{.*}}.o"
+
+// RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN: -target armv6m-none-eabi \
+// RUN: --sysroot=%S/Inputs/baremetal_arm \
+// RUN: -nodefaultlibs \
+// RUN: | FileCheck --check-prefix=CHECK-V6M-NDL %s
+// CHECK-V6M-NDL: "[[PREFIX_DIR:.*]]/bin/ld.lld" "{{.*}}.o" "-Bstatic"
+// CHECK-V6M-NDL-SAME: "-L[[PREFIX_DIR]]/lib/clang/{{.*}}/lib/baremetal" "-o" "{{.*}}.o"
+
+// RUN: %clangxx -target arm-none-eabi -v 2>&1 \
+// RUN: | FileCheck %s --check-prefix=CHECK-THREAD-MODEL
+// CHECK-THREAD-MODEL: Thread model: single