1
我有一个使用“-lm”标志来包含数学库的makefile。我还为每个.c文件包含#include。 我仍然收到数学错误和“未定义的参考”,如exp,floor和pow等Ubuntu上的gcc问题与数学库的窗口上的Bash
在windows Ubuntu上使用bash。
复制我的终端输出的:
[email protected]:~/software/BICseq2/NBICseq-norm_v0.2.4$ make
gcc -g -O2 -Wall -lm -c -o combineFile/combine.o combineFile/combine.c
gcc -g -O2 -Wall -lm -c -o lib/read.o lib/read.c
lib/read.c: In function ‘read_table’:
lib/read.c:74:14: warning: variable ‘flag’ set but not used [-Wunused-but-set-variable]
int i=0,j=0,flag=1,low_mmry = 40000, is_num=0,k;
^
gcc -g -O2 -Wall -lm combineFile/combine.o lib/read.o -o combineFile/combineFile
gcc -g -O2 -Wall -lm -c -o DataPrepare/DtaPrep.o DataPrepare/DtaPrep.c
gcc -g -O2 -Wall -lm -c -o lib/statlib.o lib/statlib.c
gcc -g -O2 -Wall -lm DataPrepare/DtaPrep.o lib/read.o lib/statlib.o -o DataPrepare/PrepPois
DataPrepare/DtaPrep.o: In function `print_oneline':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:593: undefined reference to `pow'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:591: undefined reference to `log'
DataPrepare/DtaPrep.o: In function `calculate_bias':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:685: undefined reference to `pow'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:690: undefined reference to `exp'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:681: undefined reference to `log'
DataPrepare/DtaPrep.o: In function `fprint_gc_bin':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:810: undefined reference to `floor'
DataPrepare/DtaPrep.o: In function `fprintf_predicted':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:850: undefined reference to `exp'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:860: undefined reference to `floor'
DataPrepare/DtaPrep.o: In function `calculate_bias':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/DataPrepare/DtaPrep.c:749: undefined reference to `exp'
lib/statlib.o: In function `db_shuffle':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/lib/statlib.c:56: undefined reference to `floor'
lib/statlib.o: In function `db_shuffle_int':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/lib/statlib.c:71: undefined reference to `floor'
lib/statlib.o: In function `rgamma1':
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/lib/statlib.c:99: undefined reference to `log'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/lib/statlib.c:100: undefined reference to `pow'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/lib/statlib.c:103: undefined reference to `pow'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/lib/statlib.c:104: undefined reference to `exp'
/home/labyu/software/BICseq2/NBICseq-norm_v0.2.4/lib/statlib.c:90: undefined reference to `log'
collect2: error: ld returned 1 exit status
make: *** [PrepPois] Error 1
但是,当我做的一个范例程序,比如这个:test.c的
#include <stdio.h>
#include <math.h>
int main(void)
{
int number;
number = pow(10,2);
printf("%d\n", number);
return 0;
}
我可以用gcc test.c的,即使没有-lm标志,它编译得很好。
这是一个错误?
把旗子后所有对象连接 – FreeStyle4
检查[\ [this \]](http://stackoverflow.com/q/ 19508136/1620779)类似的问题。 – sjsam
@cxw'-lm'标志在你的命令行中是无用的,这是一条编译行。 –