build(core): move default values for bindgen macros (back) into build.rs

core/Makefile

@@ -43,8 +43,6 @@ OPENOCD_INTERFACE ?= stlink
 # OpenOCD transport default. Alternative: jtag
 OPENOCD_TRANSPORT ?= hla_swd
 
-BINDGEN_MACROS_COMMON=-I../unix,-I../trezorhal/unix,-I../../build/unix,-I../../vendor/micropython/ports/unix,-I../../../crypto,-I../../../storage,-I../../vendor/micropython,-I../../vendor/micropython/lib/uzlib,-I../lib,-I../trezorhal,-I../trezorhal/unix,-I../models,-DTREZOR_EMULATOR,-DTREZOR_BOARD="boards/board-unix.h",
-
 ifeq ($(TREZOR_MODEL), 1)
 MCU = STM32F2
 LAYOUT_FILE = embed/models/model_T1B1.h
@@ -53,13 +51,11 @@ else ifeq ($(TREZOR_MODEL),$(filter $(TREZOR_MODEL),T))
 MCU = STM32F4
 LAYOUT_FILE = embed/models/model_T2T1.h
 OPENOCD_TARGET = target/stm32f4x.cfg
-BINDGEN_MACROS_MODEL = -DSTM32F427,-DTREZOR_MODEL_T,-DFLASH_BIT_ACCESS=1,-DFLASH_BLOCK_WORDS=1,
 MODEL_FEATURE = model_tt
 else ifeq ($(TREZOR_MODEL),$(filter $(TREZOR_MODEL),R))
 MCU = STM32F4
 LAYOUT_FILE = embed/models/model_T2B1.h
 OPENOCD_TARGET = target/stm32f4x.cfg
-BINDGEN_MACROS_MODEL =-DSTM32F427,-DTREZOR_MODEL_R,-DFLASH_BIT_ACCESS=1,-DFLASH_BLOCK_WORDS=1,
 MODEL_FEATURE = model_tr
 else ifeq ($(TREZOR_MODEL),$(filter $(TREZOR_MODEL),T3T1))
 MCU = STM32U5
@@ -144,7 +140,6 @@ emu: ## run emulator
 test: ## run unit tests
 	cd tests ; ./run_tests.sh $(TESTOPTS)
 
-test_rust: export BINDGEN_MACROS=$(BINDGEN_MACROS_COMMON)$(BINDGEN_MACROS_MODEL)
 test_rust: ## run rs unit tests
 	cd embed/rust ; cargo test $(TESTOPTS) --target=$(RUST_TARGET) \
 		--no-default-features --features $(MODEL_FEATURE),test \
@@ -214,7 +209,6 @@ typecheck: pyright
 pyright:
 	python ../tools/pyright_tool.py
 
-clippy: export BINDGEN_MACROS:=$(BINDGEN_MACROS_COMMON)$(BINDGEN_MACROS_MODEL)
 clippy:
 	cd embed/rust ; cargo clippy $(TESTOPTS) --all-features --target=$(RUST_TARGET)
 

core/embed/rust/build.rs

@@ -14,12 +14,54 @@ fn main() {
     link_core_objects();
 }
 
-// fn block_words() -> String {
-//     match env::var("FLASH_BLOCK_WORDS") {
-//         Ok(model) => model,
-//         Err(_) => panic!("FLASH_BLOCK_WORDS not set")
-//     }
-// }
+const DEFAULT_BINDGEN_MACROS_COMMON: &[&str] = &[
+    "-I../unix",
+    "-I../trezorhal/unix",
+    "-I../../build/unix",
+    "-I../../vendor/micropython/ports/unix",
+    "-I../../../crypto",
+    "-I../../../storage",
+    "-I../../vendor/micropython",
+    "-I../../vendor/micropython/lib/uzlib",
+    "-I../lib",
+    "-I../trezorhal",
+    "-I../trezorhal/unix",
+    "-I../models",
+    "-DTREZOR_EMULATOR",
+    "-DTREZOR_BOARD=\"boards/board-unix.h\"",
+];
+
+#[cfg(feature = "model_tt")]
+const DEFAULT_BINDGEN_MACROS_T2T1: &[&str] = &[
+    "-DSTM32F427",
+    "-DTREZOR_MODEL_T",
+    "-DFLASH_BIT_ACCESS=1",
+    "-DFLASH_BLOCK_WORDS=1",
+];
+#[cfg(not(feature = "model_tt"))]
+const DEFAULT_BINDGEN_MACROS_T2T1: &[&str] = &[];
+
+#[cfg(feature = "model_tr")]
+const DEFAULT_BINDGEN_MACROS_T2B1: &[&str] = &[
+    "-DSTM32F427",
+    "-DTREZOR_MODEL_R",
+    "-DFLASH_BIT_ACCESS=1",
+    "-DFLASH_BLOCK_WORDS=1",
+];
+#[cfg(not(feature = "model_tr"))]
+const DEFAULT_BINDGEN_MACROS_T2B1: &[&str] = &[];
+
+fn add_bindgen_macros<'a>(clang_args: &mut Vec<&'a str>, envvar: Option<&'a str>) {
+    let default_macros = DEFAULT_BINDGEN_MACROS_COMMON
+        .iter()
+        .chain(DEFAULT_BINDGEN_MACROS_T2T1)
+        .chain(DEFAULT_BINDGEN_MACROS_T2B1);
+
+    match envvar {
+        Some(envvar) => clang_args.extend(envvar.split(',')),
+        None => clang_args.extend(default_macros),
+    }
+}
 
 /// Generates Rust module that exports QSTR constants used in firmware.
 #[cfg(feature = "micropython")]
@@ -70,12 +112,9 @@ fn prepare_bindings() -> bindgen::Builder {
     let mut bindings = bindgen::Builder::default();
 
     let mut clang_args: Vec<&str> = Vec::new();
-    let includes = env::var("BINDGEN_MACROS").unwrap();
-    let args = includes.split(',');
 
-    for arg in args {
-        clang_args.push(arg);
-    }
+    let bindgen_macros_env = env::var("BINDGEN_MACROS").ok();
+    add_bindgen_macros(&mut clang_args, bindgen_macros_env.as_deref());
 
     #[cfg(feature = "xframebuffer")]
     {