src/libprofiler_builtins/build.rs

   1 //! Compiles the profiler part of the `compiler-rt` library.
   2 //!
   3 //! See the build.rs for libcompiler_builtins crate for details.
   4
   5 extern crate cc;
   6
   7 use std::env;
   8 use std::path::Path;
   9
  10 fn main() {
  11     let target = env::var("TARGET").expect("TARGET was not set");
  12     let cfg = &mut cc::Build::new();
  13
  14     let mut profile_sources = vec!["GCDAProfiling.c",
  15                                    "InstrProfiling.c",
  16                                    "InstrProfilingBuffer.c",
  17                                    "InstrProfilingFile.c",
  18                                    "InstrProfilingMerge.c",
  19                                    "InstrProfilingMergeFile.c",
  20                                    "InstrProfilingNameVar.c",
  21                                    "InstrProfilingPlatformDarwin.c",
  22                                    "InstrProfilingPlatformLinux.c",
  23                                    "InstrProfilingPlatformOther.c",
  24                                    "InstrProfilingRuntime.cc",
  25                                    "InstrProfilingUtil.c",
  26                                    "InstrProfilingValue.c",
  27                                    "InstrProfilingWriter.c"];
  28
  29     if target.contains("msvc") {
  30         // Don't pull in extra libraries on MSVC
  31         cfg.flag("/Zl");
  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"));
  38     } else {
  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         cfg.define("COMPILER_RT_HAS_UNAME", Some("1"));
  47     }
  48
  49     // The source for `compiler-rt` comes from the `compiler-builtins` crate, so
  50     // load our env var set by cargo to find the source code.
  51     let root = env::var_os("DEP_COMPILER_RT_COMPILER_RT").unwrap();
  52     let root = Path::new(&root);
  53
  54     for src in profile_sources {
  55         cfg.file(root.join("lib").join("profile").join(src));
  56     }
  57
  58     cfg.warnings(false);
  59     cfg.compile("profiler-rt");
  60 }