我知道这个错误已经被打死了,但我似乎无法让它发挥作用。我在下面链接了我的makefile:
all: gensine info cs229towav
encode.o: encode.h encode.c
gcc -c encode.c
write.o: write.c write.h
gcc -c write.c
gensine.o: encode.c gensine.h gensine.c helper.c write.c
gcc -c gensine.c -lm
helper.o: helper.c helper.h
gcc -c helper.c
read.o: read.h read.c
gcc -c read.c
info.o:read.c info.h info.c decode.c
gcc -c info.c
decode.o: decode.c decode.h helper.c
gcc -c decode.c
cs229towav.o: write.c read.c cs229towav.c cs229towav.h helper.c decode.c encode.c
gcc -c cs229towav.c -lm
gensine: encode.o gensine.o write.o helper.o
gcc -o gensine encode.o gensine.o write.o helper.o -lm
info: read.o info.o decode.o helper.o
gcc read.o info.o decode.o helper.o
cs229towav: write.o read.o cs229towav.o decode.o encode.o helper.o
gcc -o write.o read.o cs229towav.o decode.o encode.o helper.o -lm
Clean:
rm -rf *o gensine info cs229towav
当我运行诸如“make gensine”之类的命令时,会返回以下结果:
>cc gensine.c -o gensine
/tmp/ccojm09X.o: In function `encodeCsFormat':
gensine.c:(.text+0x4b1): undefined reference to `sin'
/tmp/ccojm09X.o: In function `encodeWavFormat':
gensine.c:(.text+0xa39): undefined reference to `sin'
collect2: error: ld returned 1 exit status
读完这篇文章后,说的是对 sin 的未定义引用,它在数学库中。列出的那些函数在“gensine.c”文件中的“encode.c”文件中。