/
build.rs
69 lines (60 loc) · 2.63 KB
/
build.rs
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//! Compiles the profiler part of the `compiler-rt` library.
//!
//! See the build.rs for libcompiler_builtins crate for details.
use std::env;
use std::path::Path;
fn main() {
let target = env::var("TARGET").expect("TARGET was not set");
let cfg = &mut cc::Build::new();
let mut profile_sources = vec!["GCDAProfiling.c",
"InstrProfiling.c",
"InstrProfilingBuffer.c",
"InstrProfilingFile.c",
"InstrProfilingMerge.c",
"InstrProfilingMergeFile.c",
"InstrProfilingNameVar.c",
"InstrProfilingPlatformDarwin.c",
"InstrProfilingPlatformLinux.c",
"InstrProfilingPlatformOther.c",
"InstrProfilingRuntime.cc",
"InstrProfilingUtil.c",
"InstrProfilingValue.c",
"InstrProfilingWriter.c"];
if target.contains("msvc") {
// Don't pull in extra libraries on MSVC
cfg.flag("/Zl");
profile_sources.push("WindowsMMap.c");
cfg.define("strdup", Some("_strdup"));
cfg.define("open", Some("_open"));
cfg.define("fdopen", Some("_fdopen"));
cfg.define("getpid", Some("_getpid"));
cfg.define("fileno", Some("_fileno"));
} else {
// Turn off various features of gcc and such, mostly copying
// compiler-rt's build system already
cfg.flag("-fno-builtin");
cfg.flag("-fvisibility=hidden");
cfg.flag("-fomit-frame-pointer");
cfg.flag("-ffreestanding");
cfg.define("VISIBILITY_HIDDEN", None);
cfg.define("COMPILER_RT_HAS_UNAME", Some("1"));
}
// Assume that the Unixes we are building this for have fnctl() available
if env::var_os("CARGO_CFG_UNIX").is_some() {
cfg.define("COMPILER_RT_HAS_FCNTL_LCK", Some("1"));
}
// This should be a pretty good heuristic for when to set
// COMPILER_RT_HAS_ATOMICS
if env::var_os("CARGO_CFG_TARGET_HAS_ATOMIC").map(|features| {
features.to_string_lossy().to_lowercase().contains("cas")
}).unwrap_or(false) {
cfg.define("COMPILER_RT_HAS_ATOMICS", Some("1"));
}
let root = env::var_os("RUST_COMPILER_RT_ROOT").unwrap();
let root = Path::new(&root);
for src in profile_sources {
cfg.file(root.join("lib").join("profile").join(src));
}
cfg.warnings(false);
cfg.compile("profiler-rt");
}