lld-sys 1.2.0

bindings for ld.lld core
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144

fn set_rustc_link_flags() {
    let llvm_lib_path = match std::env::var(revive_build_utils::REVIVE_LLVM_TARGET_PREFIX) {
        Ok(path) => std::path::PathBuf::from(path).join("lib"),
        _ => revive_build_utils::llvm_lib_dir(),
    };

    println!(
        "cargo:rustc-link-search=native={}",
        llvm_lib_path.to_string_lossy()
    );

    let llvm_built_with_libcxx = llvm_lib_path.join("libc++.a").exists();

    for lib in [
        // These are required by ld.lld
        "lldELF",
        "lldCommon",
        "lldMachO",
        "lldWasm",
        "LLVMSupport",
        "LLVMLinker",
        "LLVMCore",
        "LLVMLTO",
        "LLVMTargetParser",
        "LLVMBinaryFormat",
        "LLVMDemangle",
        // The `llvm-sys` crate relies on `llvm-config` to obtain a list of required LLVM libraries
        // during the build process. This works well in typical native environments, where `llvm-config`
        // can accurately list the necessary libraries.
        // However, when cross-compiling to WebAssembly using Emscripten, `llvm-config` fails to recognize
        // JavaScript-based libraries, making it necessary to manually inject the required dependencies.
        "LLVMRISCVDisassembler",
        "LLVMRISCVAsmParser",
        "LLVMRISCVCodeGen",
        "LLVMRISCVDesc",
        "LLVMRISCVInfo",
        "LLVMExecutionEngine",
        "LLVMOption",
        "LLVMMCDisassembler",
        "LLVMPasses",
        "LLVMHipStdPar",
        "LLVMCFGuard",
        "LLVMCoroutines",
        "LLVMipo",
        "LLVMVectorize",
        "LLVMInstrumentation",
        "LLVMFrontendOpenMP",
        "LLVMFrontendOffloading",
        "LLVMGlobalISel",
        "LLVMAsmPrinter",
        "LLVMSelectionDAG",
        "LLVMCodeGen",
        "LLVMTarget",
        "LLVMObjCARCOpts",
        "LLVMCodeGenTypes",
        "LLVMIRPrinter",
        "LLVMScalarOpts",
        "LLVMInstCombine",
        "LLVMAggressiveInstCombine",
        "LLVMTransformUtils",
        "LLVMBitWriter",
        "LLVMAnalysis",
        "LLVMProfileData",
        "LLVMDebugInfoDWARF",
        "LLVMObject",
        "LLVMMCParser",
        "LLVMIRReader",
        "LLVMAsmParser",
        "LLVMMC",
        "LLVMDebugInfoCodeView",
        "LLVMBitReader",
        "LLVMRemarks",
        "LLVMBitstreamReader",
        "LLVMTextAPI",
        "LLVMDebugInfoDWARFLowLevel",
        "LLVMDebugInfoGSYM",
        "LLVMDebugInfoMSF",
        "LLVMDebugInfoPDB",
        "LLVMDebugInfoBTF",
        "LLVMInterfaceStub",
        "LLVMCGData",
        "LLVMMIRParser",
        "LLVMDWARFLinker",
        "LLVMDWARFLinkerParallel",
        "LLVMDWARFLinkerClassic",
        "LLVMLibDriver",
        "LLVMDlltoolDriver",
        "LLVMTextAPIBinaryReader",
        "LLVMCoverage",
        "LLVMLineEditor",
        "LLVMRISCVTargetMCA",
        "LLVMRuntimeDyld",
        "LLVMDWP",
        "LLVMDWARFCFIChecker",
        "LLVMDebugInfoLogicalView",
        "LLVMMCA",
        "LLVMipo",
        "LLVMVectorize",
        "LLVMSandboxIR",
        "LLVMExtensions",
        "LLVMDTLTO",
        "LLVMPlugins",
        "LLVMFrontendHLSL",
    ] {
        println!("cargo:rustc-link-lib=static={lib}");
    }

    let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
    if target_os == "linux" {
        if llvm_built_with_libcxx {
            // LLVM archives reference `std::__1::…` and unwinder symbols that
            // `libstdc++` does not provide; pull them from the LLVM prefix.
            println!("cargo:rustc-link-lib=static=c++");
            if llvm_lib_path.join("libunwind.a").exists() {
                println!("cargo:rustc-link-lib=static=unwind");
            }
        } else {
            println!("cargo:rustc-link-lib=dylib=stdc++");
        }
    }
}

fn main() {
    println!(
        "cargo:rerun-if-env-changed={}",
        revive_build_utils::REVIVE_LLVM_HOST_PREFIX
    );
    println!(
        "cargo:rerun-if-env-changed={}",
        revive_build_utils::REVIVE_LLVM_TARGET_PREFIX
    );

    revive_build_utils::llvm_cxx_flags()
        .split_whitespace()
        .fold(&mut cc::Build::new(), |builder, flag| builder.flag(flag))
        .warnings(false)
        .cpp(true)
        .file("src/linker.cpp")
        .compile("liblinker.a");

    set_rustc_link_flags();

    println!("cargo:rerun-if-changed=build.rs");
}