我正在尝试在我的 Mac OS X Snow Leopard 上使用 NASM(Paul Carter 博士的 pcasm-book.pdf - http://www.drpaulcarter.com/pcasm/ )来学习组装。
我正在尝试将之前编译的 C 示例链接到 asm 示例:
gcc first.o driver.c asm_io.o -o first
但它正在返回它:
driver.c:3: warning: ‘cdecl’ attribute ignored
ld: warning: in first.o, **file is not of required architecture**
ld: warning: in asm_io.o, file is not of required architecture
Undefined symbols:
"_asm_main", referenced from:
_main in ccjLqYJn.o
ld: symbol(s) not found
我正在使用 Mach-o 格式编译 asm 示例,并且没有出现错误:
nasm -f macho **first.asm**
nasm -f macho asm_io.asm
如果我尝试在 driver.c 中仅使用 gcc -c,使用 ld 链接所有目标文件,ld 似乎没有链接 driver.o 格式。
ld -o first asm_io.o first.o driver.o
它返回:
ld: warning: in driver.o, file is not of required architecture
Undefined symbols:
"_putchar", referenced from:
print_char in asm_io.o
print_nl in asm_io.o
"_printf", referenced from:
print_int in asm_io.o
print_string in asm_io.o
push_of in asm_io.o
sub_dump_stack in asm_io.o
stack_line_loop in asm_io.o
sub_dump_mem in asm_io.o
mem_outer_loop in asm_io.o
mem_hex_loop in asm_io.o
sub_dump_math in asm_io.o
tag_loop in asm_io.o
print_real in asm_io.o
invalid_st in asm_io.o
"_scanf", referenced from:
read_int in asm_io.o
"_getchar", referenced from:
read_char in asm_io.o
ld: symbol(s) not found for inferred architecture i386
有什么问题?在 OS X 上使用 gcc 和 NASM 的正确格式是什么?
谢谢你。丹尼尔·科赫