c - GCC: undefined reference (Makefile 问题)

Question

尝试在 Makefile 规则下使用 gcc 编译这些文件。在 cygwin 上运行 gcc/make。

这是生成文件:

CC = gcc
CFLAGS = -g -O2 -Wall -std=c99
OBJECTS = simulation.o element.o

simulation.exe : $(OBJECTS)
    $(CC) $(CFLAGS) -o simulation.exe $(OBJECTS) 

simulation.o : file_priorite.o element.o
    $(CC) $(CFLAGS) -c simulation.c

file_priorite.o: file_priorite.h element.o
    $(CC) $(CFLAGS) -c file_priorite.c

element.o : element.h
    $(CC) $(CFLAGS) -c element.c 

clean:
    rm -f *.o simulation.exe

并得到这些错误:

CLEAN SUCCESSFUL (total time: 52ms)
gcc -g -O2 -Wall -std=c99 -c element.c 
gcc -g -O2 -Wall -std=c99 -c simulation.c
gcc -g -O2 -Wall -std=c99 -o simulation.exe simulation.o element.o 
simulation.o: In function `main':
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:11: undefined reference to `construire'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:11:(.text.startup+0x17): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `construire'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:20: undefined reference to `ajouter_element'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:20:(.text.startup+0x69): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `ajouter_element'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:23: undefined reference to `consommer_element'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:23:(.text.startup+0x76): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `consommer_element'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:23: undefined reference to `consommer_element'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:23:(.text.startup+0x86): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `consommer_element'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:25: undefined reference to `obtenir_taille'
/cygdrive/d/Dropbox/UQAM AUTOMNE 2014/INF7330/lab10/lab10/simulation.c:25:(.text.startup+0x96): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `obtenir_taille'
collect2: error: ld returned 1 exit status
Makefile:6: recipe for target 'simulation.exe' failed
make: *** [simulation.exe] Error 1

有问题的功能都在file_priorite.c中实现。

有什么想法吗？

Answer 1

你需要有

OBJECTS = simulation.o element.o file_priorite.o