1

make在此代码上运行以使用 DevkitARM 为 GBA 进行交叉编译会产生以下结果：

main.c
tilemap.c
linking cartridge
/opt/devkitpro/devkitARM/bin/../lib/gcc/arm-none-eabi/11.1.0/../../../../arm-none-eabi/bin/ld: tilemap.o:/home/shuffles/repos/_gba_dev/catsvsrats/include/raw/images/gui/map/tiles25.h:14: multiple definition of `TILES25_IMAGE'; main.o:/home/shuffles/repos/_gba_dev/catsvsrats/include/raw/images/gui/map/tiles25.h:14: first defined here
/opt/devkitpro/devkitARM/bin/../lib/gcc/arm-none-eabi/11.1.0/../../../../arm-none-eabi/bin/ld: tilemap.o:/home/shuffles/repos/_gba_dev/catsvsrats/include/raw/tilemap_data.h:11: multiple definition of `TILEMAP'; main.o:/home/shuffles/repos/_gba_dev/catsvsrats/include/raw/tilemap_data.h:11: first defined here
/opt/devkitpro/devkitARM/bin/../lib/gcc/arm-none-eabi/11.1.0/../../../../arm-none-eabi/bin/ld: tilemap.o:/home/shuffles/repos/_gba_dev/catsvsrats/include/raw/images/gui/map/tiles25.h:337: multiple definition of `TILES25_PALETTE'; main.o:/home/shuffles/repos/_gba_dev/catsvsrats/include/raw/images/gui/map/tiles25.h:337: first defined here
collect2: error: ld returned 1 exit status
make[1]: *** [/opt/devkitpro/devkitARM/gba_rules:25: /home/shuffles/repos/_gba_dev/catsvsrats/catsvsrats.elf] Error 1
make: *** [Makefile:121: build] Error 2

尽管链接器抱怨重复定义，但我在代码中没有发现任何内容，并且所有头文件都有#include 保护。任何信息都有帮助。

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1 回答 1

3

显然，您将标题包含在多个来源中。标头保护只是防止在同一个翻译单元中出现多个定义/声明。每个生成的目标文件都将包含提到的变量，因此链接器通过给您错误是正确的。

请不要在头文件中定义变量。在关联的源文件中定义它们，在您的情况下为“tiles25.c”。将该源添加到要编译和链接的源列表中。

头文件应该声明extern变量，为此使用关键字。

/* tiles25.h */
/* ... */
extern const uint16_t TILES25_PALETTE[];
/* ... */

/* tiles25.c */
/* ... */
const uint16_t TILES25_PALETTE[] = {
};
/* ... */
于 2021-12-08T07:36:28.540 回答