包含静态库.a文件编译报错

最新推荐文章于 2025-09-17 15:27:35 发布

原创最新推荐文章于 2025-09-17 15:27:35 发布 · 1k 阅读

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#linux #nm #静态库

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这篇博客讨论了在GCC交叉编译环境下遇到的链接错误，具体表现为库文件在调用_sbrk_r、_write_r、_close_r、_lseek_r和_read_r等函数时出现undefined reference的问题。这通常涉及到嵌入式系统中标准IO功能的实现缺失或链接配置不正确。

gcc/linux-x86/arm/gcc-arm-none-eabi-4_8-2014q3/arm-none-eabi/lib/libg.a(lib_a-sbrkr.o): In function `_sbrk_r':
sbrkr.c:(.text._sbrk_r+0x18): undefined reference to `_sbrk'
/gcc/linux-x86/arm/gcc-arm-none-eabi-4_8-2014q3/arm-none-eabi/lib/libg.a(lib_a-writer.o): In function `_write_r':
writer.c:(.text._write_r+0x20): undefined reference to `_write'
gcc/linux-x86/arm/gcc-arm-none-eabi-4_8-2014q3/arm-none-eabi/lib/libg.a(lib_a-closer.o): In function `_close_r':
closer.c:(.text._close_r+0x18): undefined reference to `_close'
gcc/linux-x86/arm/gcc-arm-none-eabi-4_8-2014q3/arm-none-eabi/lib/libg.a(lib_a-lseekr.o): In function `_lseek_r':
lseekr.c:(.text._lseek_r+0x20): undefined reference to `_lseek'
gcc/linux-x86/arm/gcc-arm-none-eabi-4_8-2014q3/arm-none-eabi/lib/libg.a(lib_a-readr.o): In function `_read_r':
readr.c:(.text._read_r+0x20): undefined reference to `_read'

包含了 printf 函数调用

检查是否包含 printf

nm libstatic.a |grep -wE "printf|malloc|fopen|fread"
         U printf