1declare_args() {
2  # The target archs LLVM should support. Defaults to the host arch.
3  # Set to a list, e.g. `llvm_targets_to_build = [ "X86", "ARM" ]`,
4  # or to the string "all" to get all known targets.
5  llvm_targets_to_build = "host"
6}
7
8# FIXME: Port the remaining targets.
9llvm_all_targets = [
10  "AArch64",
11  "AMDGPU",
12  "ARM",
13  "AVR",
14  "BPF",
15  "Hexagon",
16  "Lanai",
17  "Mips",
18  "NVPTX",
19  "PowerPC",
20  "RISCV",
21  "Sparc",
22  "SystemZ",
23  "WebAssembly",
24  "X86",
25]
26
27if (llvm_targets_to_build == "host") {
28  if (host_cpu == "arm64") {
29    llvm_targets_to_build = [ "AArch64" ]
30  } else if (host_cpu == "arm") {
31    llvm_targets_to_build = [ "ARM" ]
32  } else if (host_cpu == "ppc" || host_cpu == "ppc64") {
33    llvm_targets_to_build = [ "PowerPC" ]
34  } else if (host_cpu == "x86" || host_cpu == "x64") {
35    llvm_targets_to_build = [ "X86" ]
36  } else {
37    assert(false, "add your host_cpu above")
38  }
39} else if (llvm_targets_to_build == "all") {
40  llvm_targets_to_build = llvm_all_targets
41}
42
43# Validate that llvm_targets_to_build is set to a list of valid targets,
44# and remember which targets are built where needed (for conditionally-built
45# unittest targets).
46llvm_build_AArch64 = false
47llvm_build_AMDGPU = false
48llvm_build_ARM = false
49llvm_build_BPF = false
50llvm_build_Mips = false
51llvm_build_PowerPC = false
52llvm_build_WebAssembly = false
53llvm_build_X86 = false
54foreach(target, llvm_targets_to_build) {
55  if (target == "AArch64") {
56    llvm_build_AArch64 = true
57  } else if (target == "AMDGPU") {
58    llvm_build_AMDGPU = true
59  } else if (target == "ARM") {
60    llvm_build_ARM = true
61  } else if (target == "BPF") {
62    llvm_build_BPF = true
63  } else if (target == "Mips") {
64    llvm_build_Mips = true
65  } else if (target == "PowerPC") {
66    llvm_build_PowerPC = true
67  } else if (target == "WebAssembly") {
68    llvm_build_WebAssembly = true
69  } else if (target == "X86") {
70    llvm_build_X86 = true
71  } else if (target == "AVR" || target == "Hexagon" || target == "Lanai" ||
72             target == "NVPTX" || target == "RISCV" || target == "Sparc" ||
73             target == "SystemZ") {
74    # Nothing to do.
75  } else {
76    all_targets_string = ""
77    foreach(target, llvm_all_targets) {
78      all_targets_string += "$0x0a    " + target
79    }
80    assert(false, "Unknown target '$target' in llvm_targets_to_build. " +
81                      "Known targets:" + all_targets_string)
82  }
83}
84
85# FIXME: This should be based off target_cpu once cross compiles work.
86if (host_cpu == "arm64") {
87  native_target = "AArch64"
88} else if (host_cpu == "arm") {
89  native_target = "ARM"
90} else if (host_cpu == "ppc" || host_cpu == "ppc64") {
91  native_target = "PowerPC"
92} else if (host_cpu == "x86" || host_cpu == "x64") {
93  native_target = "X86"
94} else {
95  assert(false, "Unsuppored host_cpu '$host_cpu'.")
96}
97