Question

我希望使用gdb来调试程序。当我使用b lib.c:FUNCTION在lib.c中设置断点时，GDB会忽略断点：

Breakpoint 1 at 0x8048d03: file lib.c, line 120.
(gdb) run
Starting program: /home/jharvard/Dropbox/project/macro_main 
usage: output file in rows of INT, INT, A or D
i.e. ./macro_main in/data_1
[Inferior 1 (process 14766) exited with code 01]

我认为Makefile可能有问题。我该如何解决？

CC?=gcc
CFLAGS+= -g -Wall
LDFLAGS=
LIBS = -lm

macro_main: macro_main.o lsm.o lib.o level.o 
    $(CC) $(LDFLAGS) -o $@ $^ $(LIBS)

%.o: %.c
    $(CC) $(CFLAGS) -c -o $@ $^

clean:
    rm -rf *.o macro_main

编辑：下面是我得到的。可疑记录是Make breakpoint pending on future shared library load? (y or [n]) y。它似乎表明Makefile中没有正确链接的东西。

me (~/Dropbox/project): make
make: Warning: File `Makefile' has modification time 1.7e+06 s in the future
clang -Wall   -c -o macro_main.o macro_main.c
clang -Wall   -c -o lsm.o lsm.c
clang -Wall   -c -o lib.o lib.c
clang -Wall   -c -o level.o level.c
gcc -o macro_main macro_main.o lsm.o lib.o level.o -lm
make: warning:  Clock skew detected.  Your build may be incomplete.
me (~/Dropbox/project): gdb ./macro_main in/data_1
Reading symbols from ./macro_main...(no debugging symbols found)...done.
"/home/me/Dropbox/project/in/data_1" is not a core dump: File format not recognized
(gdb) b main 
Breakpoint 1 at 0x8048685
(gdb) run
Starting program: /home/me/Dropbox/project/macro_main 

Breakpoint 1, 0x08048685 in main ()
(gdb) b lib.c:lsm_merge
No source file named lib.c.
Make breakpoint pending on future shared library load? (y or [n]) y

Breakpoint 2 (lib.c:lsm_merge) pending.

(gdb) continue
Continuing.
usage: output file in rows of INT, INT, A or D
i.e. ./macro_main in/data_1
[Inferior 1 (process 16156) exited with code 01]

Answer 1

最后，下面的内容对我有用：

CFLAGS = -std=c99 -Wall -g -ggdb -O0
LIBS = -lm

macro_main: macro_main.o lsm.o lib.o level.o 
    gcc $(CFLAGS) -o  $@ $^ $(LIBS)


macro_main.o: macro_main.c
    gcc $(CFLAGS) -c macro_main.c

lsm.o: lsm.c
    gcc $(CFLAGS) -c lsm.c

lib.o: lib.c
    gcc $(CFLAGS) -c lib.c

level.o: level.c
    gcc $(CFLAGS) -c level.c

clean:
    rm -rf *.o macro_main

如何使用GDB调试依赖文件？

1 个答案: