diff options
| -rw-r--r-- | src/driver/aot.rs | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/driver/aot.rs b/src/driver/aot.rs index fe578e44770..7d5592daac1 100644 --- a/src/driver/aot.rs +++ b/src/driver/aot.rs @@ -333,9 +333,17 @@ fn make_module(sess: &Session, name: String) -> UnwindModule<ObjectModule> { let mut builder = ObjectBuilder::new(isa, name + ".o", cranelift_module::default_libcall_names()).unwrap(); + + // Disable function sections by default on MSVC as it causes significant slowdowns with link.exe. + // Maybe link.exe has exponential behavior when there are many sections with the same name? Also + // explicitly disable it on MinGW as rustc already disables it by default on MinGW and as such + // isn't tested. If rustc enables it in the future on MinGW, we can re-enable it too once it has + // been on MinGW. + let default_function_sections = sess.target.function_sections && !sess.target.is_like_windows; builder.per_function_section( - sess.opts.unstable_opts.function_sections.unwrap_or(sess.target.function_sections), + sess.opts.unstable_opts.function_sections.unwrap_or(default_function_sections), ); + UnwindModule::new(ObjectModule::new(builder), true) } |