1 //! Compiles the profiler part of the `compiler-rt` library.
3 //! See the build.rs for libcompiler_builtins crate for details.
9 let target = env::var("TARGET").expect("TARGET was not set");
10 let cfg = &mut cc::Build::new();
12 let mut profile_sources = vec![
15 "InstrProfilingBuffer.c",
16 "InstrProfilingFile.c",
17 "InstrProfilingMerge.c",
18 "InstrProfilingMergeFile.c",
19 "InstrProfilingNameVar.c",
20 "InstrProfilingPlatformDarwin.c",
21 "InstrProfilingPlatformLinux.c",
22 "InstrProfilingPlatformOther.c",
23 "InstrProfilingPlatformWindows.c",
24 "InstrProfilingUtil.c",
25 "InstrProfilingValue.c",
26 "InstrProfilingWriter.c",
29 if target.contains("msvc") {
30 // Don't pull in extra libraries on MSVC
32 profile_sources.push("WindowsMMap.c");
33 cfg.define("strdup", Some("_strdup"));
34 cfg.define("open", Some("_open"));
35 cfg.define("fdopen", Some("_fdopen"));
36 cfg.define("getpid", Some("_getpid"));
37 cfg.define("fileno", Some("_fileno"));
39 // Turn off various features of gcc and such, mostly copying
40 // compiler-rt's build system already
41 cfg.flag("-fno-builtin");
42 cfg.flag("-fvisibility=hidden");
43 cfg.flag("-fomit-frame-pointer");
44 cfg.flag("-ffreestanding");
45 cfg.define("VISIBILITY_HIDDEN", None);
46 if !target.contains("windows") {
47 cfg.define("COMPILER_RT_HAS_UNAME", Some("1"));
49 profile_sources.push("WindowsMMap.c");
53 // Assume that the Unixes we are building this for have fnctl() available
54 if env::var_os("CARGO_CFG_UNIX").is_some() {
55 cfg.define("COMPILER_RT_HAS_FCNTL_LCK", Some("1"));
58 // This should be a pretty good heuristic for when to set
59 // COMPILER_RT_HAS_ATOMICS
60 if env::var_os("CARGO_CFG_TARGET_HAS_ATOMIC")
61 .map(|features| features.to_string_lossy().to_lowercase().contains("cas"))
64 cfg.define("COMPILER_RT_HAS_ATOMICS", Some("1"));
67 let root = env::var_os("RUST_COMPILER_RT_ROOT").unwrap();
68 let root = Path::new(&root);
70 let src_root = root.join("lib").join("profile");
71 for src in profile_sources {
72 cfg.file(src_root.join(src));
75 // The file was renamed in LLVM 10.
76 let old_runtime_path = src_root.join("InstrProfilingRuntime.cc");
77 let new_runtime_path = src_root.join("InstrProfilingRuntime.cpp");
78 cfg.file(if old_runtime_path.exists() { old_runtime_path } else { new_runtime_path });
80 cfg.include(root.join("include"));
82 cfg.compile("profiler-rt");