G++ ARM 交叉编译：未定义的引用

Question

我正在尝试使用 arm-none-eabi-g++ 编译 Jasmine OpenSSD 代码。 但是，它首先失败并显示以下错误消息

/usr/lib/gcc/arm-none-eabi/4.8.2/../../../arm-none-eabi/bin/ld: cannot find -lstdc++

为了解决这个问题，我确保可以与 libstdc++.a 链接。一旦我修复了它，它就会失败并出现以下错误：

/usr/lib/gcc/arm-none-eabi/4.8.2//libgcc.a(unwind-arm.o): In function `get_eit_entry':
/build/buildd/gcc-arm-none-eabi-6/build/arm-none-eabi/libgcc/../../../gcc-4.8.2/libgcc/unwind-arm-common.inc:221: undefined reference to `__exidx_end'
/build/buildd/gcc-arm-none-eabi-6/build/arm-none-eabi/libgcc/../../../gcc-4.8.2/libgcc/unwind-arm-common.inc:221: undefined reference to `__exidx_start'
/usr/lib/gcc/arm-none-eabi/4.8.2/../../../arm-none-eabi/lib/libc.a(lib_a-abort.o): In function `abort':
/build/buildd/newlib-2.1.0/build/arm-none-eabi/newlib/libc/stdlib/../../../../../newlib/libc/stdlib/abort.c:63: undefined reference to `_exit'
/usr/lib/gcc/arm-none-eabi/4.8.2/../../../arm-none-eabi/lib/libc.a(lib_a-signalr.o): In function `_kill_r':
/build/buildd/newlib-2.1.0/build/arm-none-eabi/newlib/libc/reent/../../../../../newlib/libc/reent/signalr.c:61: undefined reference to `_kill'
/usr/lib/gcc/arm-none-eabi/4.8.2/../../../arm-none-eabi/lib/libc.a(lib_a-signalr.o): In function `_getpid_r':
/build/buildd/newlib-2.1.0/build/arm-none-eabi/newlib/libc/reent/../../../../../newlib/libc/reent/signalr.c:96: undefined reference to `_getpid'
/usr/lib/gcc/arm-none-eabi/4.8.2/../../../arm-none-eabi/lib/libc.a(lib_a-sbrkr.o): In function `_sbrk_r':
/build/buildd/newlib-2.1.0/build/arm-none-eabi/newlib/libc/reent/../../../../../newlib/libc/reent/sbrkr.c:58: undefined reference to `_sbrk'
collect2: error: ld returned 1 exit status
make: *** [firmware.elf] Error 1

这是失败的实际步骤：

arm-none-eabi-g++ -static -nostartfiles -ffreestanding -T ld_script -Wl,-O1,-Map=list.txt  ftl.o sata_identify.o sata_cmd.o sata_isr.o sata_main.o sata_table.o initialize.o mem_util.o flash.o flash_wrapper.o misc.o uart.o init.o -o firmware.elf -L"/usr/lib/gcc/arm-none-eabi/4.8.2/" -lgcc

有人可以提出解决办法吗？此外，如果我使用 arm-none-eabi-gcc 而不是 arm-none-eabi-g++，这将非常有效

Answer 1

您的问题是由编译器生成的异常处理代码引起的，该代码依赖于运行时组件 - 这些组件在您的构建中不存在。

-fno-exceptions 在编译器的代码生成中关闭异常处理。