错误：试图链接库文件

Question

我已经通过相关链接库到计算器AC文件多的问题消失了，当无法找到libary文件，我也跟着方法如下

注：我的图书馆文件位于.c文件的相同位置。

如何解决这些错误？

1. 使用库名与扩展

CC consoleDemo.c -L。 -lusbcan64.a

-L {文件路径包含库} -1- $ {库名称} 以下是编译的

/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lUSBCAN64.a 
collect2: error: ld returned 1 exit status 

错误使用没有扩展名的库名称

cc consoleDemo.c -L。 -lusbcan64

以下是编译

/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible ./libUSBCAN64.a when searching for -lUSBCAN64 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible ./libUSBCAN64.a when searching for -lUSBCAN64 
/tmp/ccTh3hGd.o:ConsoleDemo.c:(.text+0x2b9): undefined reference to `_kbhit' 
/tmp/ccTh3hGd.o:ConsoleDemo.c:(.text+0x2b9): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `_kbhit' 
/tmp/ccTh3hGd.o:ConsoleDemo.c:(.text+0x2c6): undefined reference to `_getch' 
/tmp/ccTh3hGd.o:ConsoleDemo.c:(.text+0x2c6): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `_getch' 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanInitHardware' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanDeinitHardware' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanGetModuleTime' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanInitCanEx2' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanResetCanEx' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanReadCanMsgEx' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanWriteCanMsgEx' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): relocation truncated to fit: R_X86_64_32 against symbol `__imp_UcanGetStatusEx' defined in .idata$5 section in /usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b) 
/usr/lib/gcc/x86_64-pc-cygwin/5.4.0/../../../../lib/USBCAN64.lib(USBCAN64.dll.b):(.text+0x2): additional relocation overflows omitted from the output 
collect2: error: ld returned 1 exit status 

Answer 1

的错误第一次尝试作为-l标志和不能同时被指定。一个后缀根本无效。你的第二次尝试暴露了三种问题。

1. 一个不兼容的libUSBCAN64.a版本（可能是因为错误的操作系统或CPU）。不是一个大问题，因为你有最终发现的正确版本，但是一个恼人的警告。只要删除该文件。
2. kbhit和getch的未定义符号。这些是Microsoft产品特有的非标准功能。您需要链接到Microsoft库（这可能会也可能不会），或者（更好地）完全避免使用这些函数，而是使用标准的C语言。
3. 截断的重定位。这可能意味着你的程序太大或者你使用了不合适的编译标志或内联程序集。谷歌“重新定位被截断为适合：R_X86_64_32”和/或发布有关这个特定问题的另一个问题以及您的完整源代码和构建命令。