我正在尝试为我的c文件创建依赖文件。
[INFO] CMD: gcc -Wall -std=c11 -MM -MT ./stuff/cat.c -MF ./deps/cat.c.d -fPIC -o ./obj/stuff/cat.o -c ./stuff/cat.c
[INFO] CMD: gcc -Wall -std=c11 -MM -MT ./stuff/add.c -MF ./deps/add.c.d -fPIC -o ./obj/stuff/add.o -c ./stuff/add.c
[INFO] CMD: gcc -Wall -std=c11 -MM -MT ./stuff/rot13.c -MF ./deps/rot13.c.d -fPIC -o ./obj/stuff/rot13.o -c ./stuff/rot13.c
[INFO] CMD: ld -r -o ./obj/stuff.o ./obj/stuff/cat.o ./obj/stuff/add.o ./obj/stuff/rot13.o
[INFO] CMD: gcc -shared -o ./target/libstuff.so ./obj/stuff.o
[INFO] CMD: ar -rc ./target/libstuff.a ./obj/stuff.o
[INFO] CMD: gcc -Wall -std=c11 -o ./target/stuff ./obj/stuff.o ./tests/stuff.c
/usr/bin/ld: /tmp/ccF2LsaB.o: in function `test_add_2':
stuff.c:(.text+0x2106): undefined reference to `add_2'objdump -d提供给我：
christopher$ objdump -d ./obj/stuff.o
./obj/stuff.o: file format elf64-x86-64在没有依赖项的情况下进行编译时，一切都按预期运行！
[INFO] CMD: gcc -Wall -std=c11 -fPIC -o ./obj/stuff/cat.o -c ./stuff/cat.c
[INFO] CMD: gcc -Wall -std=c11 -fPIC -o ./obj/stuff/add.o -c ./stuff/add.c
[INFO] CMD: gcc -Wall -std=c11 -fPIC -o ./obj/stuff/rot13.o -c ./stuff/rot13.c
[INFO] CMD: ld -r -o ./obj/stuff.o ./obj/stuff/cat.o ./obj/stuff/add.o ./obj/stuff/rot13.o
[INFO] CMD: gcc -shared -o ./target/libstuff.so ./obj/stuff.o
[INFO] CMD: ar -rc ./target/libstuff.a ./obj/stuff.o
[INFO] CMD: gcc -Wall -std=c11 -o ./target/stuff ./obj/stuff.o ./tests/stuff.c
[INFO] CMD: ./target/stuff
[INFO] DESCRIBE: ./tests/stuff.c => stuff
[RUN!] It should... add 2 to input
[..OK] Passed
[RUN!] It should... add 2 to input with failure
[FAIL] file: ./tests/stuff.c => line: 12和ofc objdump -d
christopher$ objdump -d ./obj/stuff.o
./obj/stuff.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <cat_file>:
0: f3 0f 1e fa endbr64
4: 55 push %rbp
5: 48 89 e5 mov %rsp,%rbp
8: 48 83 ec 20 sub $0x20,%rsp
...
1条答案
按热度按时间bbuxkriu1#
我也遇到了同样的问题。最后我发现原因是
-M和-MM会隐含-E。请参阅GNU文档。而选项
-E除了预处理之外什么也不做，情况就是这样。如果你想同时生成依赖输出文件和编译源文件，你可以使用
-MD或-MMD代替，但它们有一些区别，详见文档。