valopt release-channel "dev" "the name of the release channel to build"
valopt musl-root "/usr/local" "MUSL root installation directory"
+# Used on systems where "cc" and "ar" are unavailable
+valopt default-linker "cc" "the default linker"
+valopt default-ar "ar" "the default ar"
+
# Many of these are saved below during the "writing configuration" step
# (others are conditionally saved).
opt_nosave manage-submodules 1 "let the build manage the git submodules"
# this exists can be found on issue #2400
export CFG_COMPILER_HOST_TRIPLE
+# Used as defaults for the runtime ar and cc tools
+export CFG_DEFAULT_LINKER
+export CFG_DEFAULT_AR
+
# The standard libraries should be held up to a higher standard than any old
# code, make sure that these common warnings are denied by default. These can
# be overridden during development temporarily. For stage0, we allow warnings
fn default() -> TargetOptions {
TargetOptions {
data_layout: String::new(),
- linker: "cc".to_string(),
- ar: "ar".to_string(),
+ linker: option_env!("CFG_DEFAULT_LINKER").unwrap_or("cc").to_string(),
+ ar: option_env!("CFG_DEFAULT_AR").unwrap_or("ar").to_string(),
pre_link_args: Vec::new(),
post_link_args: Vec::new(),
cpu: "generic".to_string(),