get it working

agb/build.rs

@@ -43,9 +43,7 @@ fn main() {
                 println!("cargo:warning={}", warning_line);
             }
         }
-        println!("cargo:rustc-link-arg={}", out_file_path);
     }
 
     println!("cargo:rustc-link-search={}", out_dir);
-    // println!("cargo:rustc-link-arg={}/crt0.o", out_dir);
 }

agb/gba.ld

@@ -12,6 +12,12 @@ MEMORY {
 
 __text_start = ORIGIN(rom);
 
+INPUT (
+    crt0.o
+    interrupt_handler.o
+    mixer.o
+)
+
 SECTIONS {
     . = __text_start;
 

book/games/pong/gba.ld

@@ -12,15 +12,19 @@ MEMORY {
 
 __text_start = ORIGIN(rom);
 
+INPUT (
+    crt0.o
+    interrupt_handler.o
+    mixer.o
+)
+
 SECTIONS {
     . = __text_start;
 
-    .crt0 : {
-		KEEP (crt0.o(.text));
-		. = ALIGN(4);
-    } > rom
 
     .text : {
+        KEEP(*(.crt0));
+        *(.crt0 .crt0*);
         *(.text .text*);
         . = ALIGN(4);
     } > rom

examples/the-hat-chooses-the-wizard/gba.ld

@@ -12,9 +12,16 @@ MEMORY {
 
 __text_start = ORIGIN(rom);
 
+INPUT (
+    crt0.o
+    interrupt_handler.o
+    mixer.o
+)
+
 SECTIONS {
     . = __text_start;
 
+
     .text : {
         KEEP(*(.crt0));
         *(.crt0 .crt0*);

examples/the-purple-night/gba.ld

@@ -12,9 +12,16 @@ MEMORY {
 
 __text_start = ORIGIN(rom);
 
+INPUT (
+    crt0.o
+    interrupt_handler.o
+    mixer.o
+)
+
 SECTIONS {
     . = __text_start;
 
+
     .text : {
         KEEP(*(.crt0));
         *(.crt0 .crt0*);