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libafl_cc: Add override env vars to configure LLVM (#1310)

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Co-authored-by: Dominik Maier <domenukk@gmail.com>
This commit is contained in:
s1341 2023-06-09 17:55:31 +03:00 committed by GitHub
parent 62b1bde7a9
commit 751d96f45a
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 36 additions and 5 deletions
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41
libafl_cc/build.rs
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@ -121,7 +121,12 @@ fn find_macos_sdk_libs() -> String {
}
fn find_llvm_version() -> Option<i32> {
let output = exec_llvm_config(&["--version"]);
let llvm_env_version = env::var("LLVM_VERSION");
let output = if let Ok(version) = llvm_env_version {
version
} else {
exec_llvm_config(&["--version"])
};
if let Some(major) = output.split('.').collect::<Vec<&str>>().first() {
if let Ok(res) = major.parse::<i32>() {
return Some(res);
@ -219,13 +224,27 @@ fn main() {
let mut clang_constants_file = File::create(dest_path).expect("Could not create file");
println!("cargo:rerun-if-env-changed=LLVM_CONFIG");
println!("cargo:rerun-if-env-changed=LLVM_BINDIR");
println!("cargo:rerun-if-env-changed=LLVM_CXXFLAGS");
println!("cargo:rerun-if-env-changed=LLVM_LDFLAGS");
println!("cargo:rerun-if-env-changed=LLVM_VERSION");
println!("cargo:rerun-if-env-changed=LIBAFL_EDGES_MAP_SIZE");
println!("cargo:rerun-if-env-changed=LIBAFL_ACCOUNTING_MAP_SIZE");
println!("cargo:rerun-if-changed=src/common-llvm.h");
println!("cargo:rerun-if-changed=build.rs");
let llvm_bindir = env::var("LLVM_BINDIR");
let llvm_cxxflags = env::var("LLVM_CXXFLAGS");
let llvm_ldflags = env::var("LLVM_LDFLAGS");
let llvm_version = env::var("LLVM_VERSION");
// test if llvm-config is available and we can compile the passes
if find_llvm_config().is_err() {
if find_llvm_config().is_err()
&& !(llvm_bindir.is_ok()
&& llvm_cxxflags.is_ok()
&& llvm_ldflags.is_ok()
&& llvm_version.is_ok())
{
println!(
"cargo:warning=Failed to find llvm-config, we will not build LLVM passes. If you need them, set the LLVM_CONFIG environment variable to a recent llvm-config."
);
@ -246,7 +265,11 @@ pub const LIBAFL_CC_LLVM_VERSION: Option<usize> = None;
return;
}
let llvm_bindir = exec_llvm_config(&["--bindir"]);
let llvm_bindir = if let Ok(bindir) = llvm_bindir {
bindir
} else {
exec_llvm_config(&["--bindir"])
};
let bindir_path = Path::new(&llvm_bindir);
let clang;
@ -270,7 +293,11 @@ pub const LIBAFL_CC_LLVM_VERSION: Option<usize> = None;
return;
}
let cxxflags = exec_llvm_config(&["--cxxflags"]);
let cxxflags = if let Ok(flags) = llvm_cxxflags {
flags
} else {
exec_llvm_config(&["--cxxflags"])
};
let mut cxxflags: Vec<String> = cxxflags.split_whitespace().map(String::from).collect();
let edges_map_size: usize = option_env!("LIBAFL_EDGES_MAP_SIZE")
@ -322,7 +349,11 @@ pub const LIBAFL_CC_LLVM_VERSION: Option<usize> = None;
}
llvm_config_ld.push("--ldflags");
let ldflags = exec_llvm_config(&llvm_config_ld);
let ldflags = if let Ok(flags) = llvm_ldflags {
flags
} else {
exec_llvm_config(&llvm_config_ld)
};
let mut ldflags: Vec<&str> = ldflags.split_whitespace().collect();
if cfg!(unix) {