程序不會再找到math.h

Question

經過很長時間，我下載了一個我共同開發的程序，並試圖在我的Ubuntu Linux 12.04上重新編譯它，但似乎它找不到math.h了。這可能是因爲事情已經在gcc最近改變了，但我不能弄清楚，如果這件事情錯在src/Makefile.am或丟失的依賴：

下載從http://www.ub.edu/softevol/variscan/：

tar xzf variscan-2.0.2.tar.gz 
cd variscan-2.0.2/ 
make distclean 
sh ./autogen.sh 
make 

我得到： [。 ..]

gcc -DNDEBUG -O3 -W -Wall -ansi -pedantic -lm -o variscan variscan.o statistics.o common.o linefile.o memalloc.o dlist.o errabort.o dystring.o intExp.o kxTok.o pop.o window.o free.o output.o readphylip.o readaxt.o readmga.o readmaf.o readhapmap.o readxmfa.o readmav.o ran1.o swcolumn.o swnet.o swpoly.o swref.o 
statistics.o: In function `calculate_Fu_and_Li_D': 
statistics.c:(.text+0x497): undefined reference to `sqrt' 
statistics.o: In function `calculate_Fu_and_Li_F': 
statistics.c:(.text+0x569): undefined reference to `sqrt' 
statistics.o: In function `calculate_Fu_and_Li_D_star': 
statistics.c:(.text+0x63b): undefined reference to `sqrt' 
statistics.o: In function `calculate_Fu_and_Li_F_star': 
statistics.c:(.text+0x75c): undefined reference to `sqrt' 
statistics.o: In function `calculate_Tajima_D': 
statistics.c:(.text+0x85d): undefined reference to `sqrt' 
statistics.o:statistics.c:(.text+0xcb1): more undefined references to `sqrt' follow 
statistics.o: In function `calcRunMode21Stats': 
statistics.c:(.text+0xe02): undefined reference to `log' 
statistics.o: In function `correctedDivergence': 
statistics.c:(.text+0xe5a): undefined reference to `log' 
statistics.o: In function `calcRunMode22Stats': 
statistics.c:(.text+0x104a): undefined reference to `sqrt' 
statistics.o: In function `calculate_Fu_fs': 
statistics.c:(.text+0x11a8): undefined reference to `fabsl' 
statistics.c:(.text+0x11ca): undefined reference to `powl' 
statistics.c:(.text+0x11f2): undefined reference to `logl' 
statistics.o: In function `calculateStatistics': 
statistics.c:(.text+0x13f2): undefined reference to `log' 
collect2: ld returned 1 exit status 
make[1]: *** [variscan] Error 1 
make[1]: Leaving directory `/home/avilella/variscan/latest/variscan-2.0.2/src' 
make: *** [all-recursive] Error 1 

的圖書館有，因爲這個簡單的例子可以工作得很好：

$ gcc test.c -o test -lm 
$ cat test.c 
#include <stdio.h> 
#include <math.h> 
int main(void) 
{ 
     double x = 0.5; 
     double result = sqrt(x); 
     printf("The hyperbolic cosine of %lf is %lf\n", x, result); 
     return 0; 
} 

任何想法？

Answer 1

圖書館需要去在編譯器命令結束時，當你在簡單的例子有：

gcc -DNDEBUG -O3 -W -Wall -ansi -pedantic -o variscan variscan.o statistics.o common.o linefile.o memalloc.o dlist.o errabort.o dystring.o intExp.o kxTok.o pop.o window.o free.o output.o readphylip.o readaxt.o readmga.o readmaf.o readhapmap.o readxmfa.o readmav.o ran1.o swcolumn.o swnet.o swpoly.o swref.o statistics.o -lm

從GCC Link Options：

 
-llibrary 
-l library 
    Search the library named library when linking. 
    (The second alternative with the library as a separate argument 
    is only for POSIX compliance and is not recommended.) 

    It makes a difference where in the command you write this option; 
    the linker searches and processes libraries and object files in the 
    order they are specified. 
    Thus, `foo.o -lz bar.o' searches library `z' after file foo.o but 
    before bar.o. If bar.o refers to functions in `z', those functions 
    may not be loaded. 

Answer 2

好像這個簡單的變化就足夠了在Makefile.am：

+variscan_LDADD = -lm 
-variscan_LDFLAGS = -lm