diff options
| -rw-r--r-- | docs/env_vars.md | 3 | ||||
| -rw-r--r-- | src/backend.rs | 7 |
2 files changed, 4 insertions, 6 deletions
diff --git a/docs/env_vars.md b/docs/env_vars.md index 07b75622a58..f0a0a6ad42e 100644 --- a/docs/env_vars.md +++ b/docs/env_vars.md @@ -9,7 +9,4 @@ object files when their content should have been changed by a change to cg_clif.</dd> <dt>CG_CLIF_DISPLAY_CG_TIME</dt> <dd>If "1", display the time it took to perform codegen for a crate</dd> - <dt>CG_CLIF_FUNCTION_SECTIONS</dt> - <dd>Use a single section for each function. This will often reduce the executable size at the - cost of making linking significantly slower.</dd> </dl> diff --git a/src/backend.rs b/src/backend.rs index aac37b376dc..9e32259716f 100644 --- a/src/backend.rs +++ b/src/backend.rs @@ -198,8 +198,9 @@ pub(crate) fn make_module(sess: &Session, name: String) -> ObjectModule { cranelift_module::default_libcall_names(), ) .unwrap(); - if std::env::var("CG_CLIF_FUNCTION_SECTIONS").is_ok() { - builder.per_function_section(true); - } + // Unlike cg_llvm, cg_clif defaults to disabling -Zfunction-sections. For cg_llvm binary size + // is important, while cg_clif cares more about compilation times. Enabling -Zfunction-sections + // can easily double the amount of time necessary to perform linking. + builder.per_function_section(sess.opts.debugging_opts.function_sections.unwrap_or(false)); ObjectModule::new(builder) } |