backend: improve minimization

Author: af-airbus

Makefile

@@ -1,8 +1,8 @@
 RELEASE_DIR:=release
 DEBUG_DIR:=debug
 
-#BACKEND_WINDOWS32_RUST_FLAGS:=--remap-path-prefix ${HOME}=/foo -Ctarget-feature=+crt-static
-BACKEND_WINDOWS64_RUST_FLAGS:=--remap-path-prefix ${HOME}=/foo -Ctarget-feature=+crt-static
+#BACKEND_WINDOWS32_RUST_FLAGS:=--remap-path-prefix ${HOME}=/foo -Ctarget-feature=+crt-static -Zlocation-detail=none
+BACKEND_WINDOWS64_RUST_FLAGS:=--remap-path-prefix ${HOME}=/foo -Ctarget-feature=+crt-static -Zlocation-detail=none
 #BACKEND_WINDOWS32_BUILD_FLAGS:=-Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort
 BACKEND_WINDOWS64_BUILD_FLAGS:=-Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort
 

backend/Cargo.toml

@@ -35,6 +35,7 @@ debug = false
 strip = true
 lto = true
 panic = "abort"
+codegen-units = 1
 
 [features]
 log = [ "common/log", "dep:log" ]

backend/src/lib.rs

@@ -234,7 +234,7 @@ pub extern "system" fn Main() {
 
 #[no_mangle]
 #[allow(non_snake_case, unused_variables, clippy::missing_safety_doc)]
-pub unsafe extern "system" fn DllMain(
+pub extern "system" fn DllMain(
     dll_module: ws::Win32::Foundation::HINSTANCE,
     call_reason: u32,
     _reserverd: *mut ffi::c_void,