[clang] [Driver] Implement ToolChain on Haiku (PR #66038)

[Fangrui Song via cfe-commits]

================
@@ -36,3 +36,32 @@
 // CHECK-C-HEADER-PATH: "-internal-isystem" "/boot/system/develop/headers/gnu"
 // CHECK-C-HEADER-PATH: "-internal-isystem" "/boot/system/develop/headers/posix"
 // CHECK-C-HEADER-PATH: "-internal-isystem" "/boot/system/develop/headers"
+
+// Check x86_64-unknown-haiku, X86_64
+// RUN: %clang -### %s 2>&1 --target=x86_64-unknown-haiku \
+// RUN:     --gcc-toolchain="" \
+// RUN:     --sysroot=%S/Inputs/haiku_x86_64_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-X86_64 %s
+// CHECK-LD-X86_64: "-cc1" "-triple" "x86_64-unknown-haiku"
+// CHECK-LD-X86_64-SAME: "-isysroot" "[[SYSROOT:[^"]+]]"
+// CHECK-LD-X86_64: "{{.*}}ld{{(.exe)?}}"
+// CHECK-LD-X86_64-SAME: "--no-undefined"
+// CHECK-LD-X86_64-SAME: "[[SYSROOT]]/boot/system/develop/lib/crti.o"
----------------
MaskRay wrote:

You may use the `-SAME: {{^}} ` pattern I did in linux-cross.cpp. It additionally tests that there is no extra command line argument in between.

https://github.com/llvm/llvm-project/pull/66038