Hey, I was trying to link some rust code I wrote according to these docs, but I can’t seem to get the build system to find my library. Here is the error ld spits out:
LD .obj/f7/firmware.elf
-L /home/paul/Documents/git/flipperzero-firmware/lib -lrusty -Wl,--wrap,_malloc_r -Wl,--wrap,_free_r -Wl,--wrap,_calloc_r -Wl,--wrap,_realloc_r -mcpu=cortex-m4 -mthum
b -mfpu=fpv4-sp-d16 -mfloat-abi=hard -specs=nosys.specs -specs=nano.specs -u _printf_float -Wl,--start-group -lstdc++ -lsupc++ -Wl,--end-group -Ttargets/f7/stm32wb55x
x_flash_cm4_with_bootloader.ld -Wl,-Map=.obj/f7/firmware.map,--cref -Wl,--gc-sections -Wl,--undefined=uxTopUsedPriority -n
/opt/gcc-arm-none-eabi-10.3-2021.10/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/bin/ld: .obj/f7//home/paul/Documents/git/flipperzero-firmware/applic
ations/my_app/my_app.o: in function `my_app_render_callback':
/home/paul/Documents/git/flipperzero-firmware/applications/my_app/my_app.c:29: undefined reference to `hello_rust'
collect2: error: ld returned 1 exit status
make: *** [/home/paul/Documents/git/flipperzero-firmware/make/rules.mk:46: .obj/f7/firmware.elf] Error 1
Here is a patch of the changes I made:
diff --git a/applications/my_app/librusty.h b/applications/my_app/librusty.h
new file mode 100644
index 00000000..fd889df3
--- /dev/null
+++ b/applications/my_app/librusty.h
@@ -0,0 +1,2 @@
+uint16_t hello_rust(void);
+
diff --git a/applications/my_app/my_app.c b/applications/my_app/my_app.c
index 92203cc7..00ad0b23 100644
--- a/applications/my_app/my_app.c
+++ b/applications/my_app/my_app.c
@@ -1,6 +1,7 @@
#include <furi.h>
#include <gui/gui.h>
#include <input/input.h>
+#include <my_app/librusty.h>
#define MOUSE_MOVE_SHORT 5
#define MOUSE_MOVE_LONG 20
@@ -25,6 +26,8 @@ coordinate position = { .x = 0, .y = 0};
static void my_app_render_callback(Canvas* canvas, void* ctx) {
canvas_draw_dot(canvas, position.x, position.y);
canvas_set_font(canvas, FontSecondary);
+ uint16_t thing = hello_rust();
+ canvas_draw_str(canvas, thing, thing, "hello");
}
static void my_app_input_callback(InputEvent* input_event, void* ctx) {
@@ -34,6 +37,7 @@ static void my_app_input_callback(InputEvent* input_event, void* ctx) {
event.type = EventTypeInput;
event.input = *input_event;
osMessageQueuePut(event_queue, &event, 0, osWaitForever);
+
}
int32_t my_app(void* p) {
diff --git a/lib/librusty.a b/lib/librusty.a
new file mode 100644
index 00000000..8f86d05c
Binary files /dev/null and b/lib/librusty.a differ
diff --git a/lib/librusty.d b/lib/librusty.d
new file mode 100644
index 00000000..9394d5db
--- /dev/null
+++ b/lib/librusty.d
@@ -0,0 +1 @@
+/home/paul/Documents/git/flipper_test_rust/target/thumbv7em-none-eabihf/release/librusty.a: /home/paul/Documents/git/flipper_test_rust/src/lib.rs
diff --git a/make/base.mk b/make/base.mk
index 696c4294..b175da60 100644
--- a/make/base.mk
+++ b/make/base.mk
@@ -5,7 +5,8 @@ CPP_SOURCES =
ASSETS =
OPENOCD_OPTS =
-CFLAGS =
+CFLAGS = -L /home/paul/Documents/git/flipperzero-firmware/lib -lrusty
+
CPPFLAGS =
-LDFLAGS =
-SVD_FILE =
\ No newline at end of file
+LDFLAGS = -L /home/paul/Documents/git/flipperzero-firmware/lib -lrusty
+SVD_FILE =
diff --git a/make/rules.mk b/make/rules.mk
index c67a3730..0e8f79c9 100644
--- a/make/rules.mk
+++ b/make/rules.mk
@@ -42,6 +42,7 @@ all: $(OBJ_DIR)/$(PROJECT).elf $(OBJ_DIR)/$(PROJECT).hex $(OBJ_DIR)/$(PROJECT).b
$(OBJ_DIR)/$(PROJECT).elf: $(OBJECTS)
@echo "\tLD\t" $@
+ @echo $(LDFLAGS)
@$(LD) $(LDFLAGS) $(OBJECTS) -o $@
@$(SZ) $@
@@ -67,6 +68,7 @@ $(OBJ_DIR)/$(PROJECT).json: $(OBJ_DIR)/$(PROJECT).dfu
$(OBJ_DIR)/%.o: %.c $(OBJ_DIR)/BUILD_FLAGS
@echo "\tCC\t" $(subst $(PROJECT_ROOT)/, , $<)
+ @echo $(CFLAGS)
@$(CC) $(CFLAGS) -c $< -o $@
$(OBJ_DIR)/%.o: %.s $(OBJ_DIR)/BUILD_FLAGS
diff --git a/make/toolchain.mk b/make/toolchain.mk
index d6e653d3..7f4d95b4 100644
--- a/make/toolchain.mk
+++ b/make/toolchain.mk
@@ -27,4 +27,4 @@ endif
CFLAGS += -fdata-sections -ffunction-sections -fno-math-errno -fstack-usage -MMD -MP -MF"$(@:%.o=%.d)"
CPPFLAGS += -fno-threadsafe-statics -fno-use-cxa-atexit -fno-exceptions -fno-rtti
-LDFLAGS += -Wl,-Map=$(OBJ_DIR)/$(PROJECT).map,--cref -Wl,--gc-sections -Wl,--undefined=uxTopUsedPriority -n
\ No newline at end of file
+LDFLAGS += -Wl,-Map=$(OBJ_DIR)/$(PROJECT).map,--cref -Wl,--gc-sections -Wl,--undefined=uxTopUsedPriority -n
Any help would be appreciated! I don’t know much about GCC, LD, or Make, so I’m quite lost.
This is probably bad: 