75 lines
2.8 KiB
Rust
75 lines
2.8 KiB
Rust
//! Compiles the profiler part of the `compiler-rt` library.
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//!
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//! See the build.rs for libcompiler_builtins crate for details.
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use std::env;
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use std::path::Path;
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fn main() {
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let target = env::var("TARGET").expect("TARGET was not set");
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let cfg = &mut cc::Build::new();
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let mut profile_sources = vec!["GCDAProfiling.c",
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"InstrProfiling.c",
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"InstrProfilingBuffer.c",
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"InstrProfilingFile.c",
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"InstrProfilingMerge.c",
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"InstrProfilingMergeFile.c",
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"InstrProfilingNameVar.c",
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"InstrProfilingPlatformDarwin.c",
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"InstrProfilingPlatformLinux.c",
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"InstrProfilingPlatformOther.c",
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"InstrProfilingPlatformWindows.c",
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"InstrProfilingRuntime.cc",
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"InstrProfilingUtil.c",
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"InstrProfilingValue.c",
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"InstrProfilingWriter.c"];
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if target.contains("msvc") {
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// Don't pull in extra libraries on MSVC
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cfg.flag("/Zl");
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profile_sources.push("WindowsMMap.c");
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cfg.define("strdup", Some("_strdup"));
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cfg.define("open", Some("_open"));
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cfg.define("fdopen", Some("_fdopen"));
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cfg.define("getpid", Some("_getpid"));
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cfg.define("fileno", Some("_fileno"));
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} else {
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// Turn off various features of gcc and such, mostly copying
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// compiler-rt's build system already
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cfg.flag("-fno-builtin");
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cfg.flag("-fvisibility=hidden");
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cfg.flag("-fomit-frame-pointer");
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cfg.flag("-ffreestanding");
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cfg.define("VISIBILITY_HIDDEN", None);
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if !target.contains("windows") {
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cfg.define("COMPILER_RT_HAS_UNAME", Some("1"));
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} else {
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profile_sources.push("WindowsMMap.c");
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}
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}
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// Assume that the Unixes we are building this for have fnctl() available
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if env::var_os("CARGO_CFG_UNIX").is_some() {
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cfg.define("COMPILER_RT_HAS_FCNTL_LCK", Some("1"));
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}
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// This should be a pretty good heuristic for when to set
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// COMPILER_RT_HAS_ATOMICS
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if env::var_os("CARGO_CFG_TARGET_HAS_ATOMIC").map(|features| {
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features.to_string_lossy().to_lowercase().contains("cas")
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}).unwrap_or(false) {
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cfg.define("COMPILER_RT_HAS_ATOMICS", Some("1"));
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}
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let root = env::var_os("RUST_COMPILER_RT_ROOT").unwrap();
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let root = Path::new(&root);
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for src in profile_sources {
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cfg.file(root.join("lib").join("profile").join(src));
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}
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cfg.warnings(false);
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cfg.compile("profiler-rt");
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}
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