我不能讓gcc工作

Question

我必須編譯一個隨matlab工具箱附帶的.c文件。

爲此我下載的Xcode 3.1.4，現在我想命令，如

​​3210

並得到這樣的錯誤

Undefined symbols: 
    "_N_VFree", referenced from: 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
    "_CVDiag", referenced from: 
     _integrate in cca0ChgX.o 
     _docollapse in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
    "_CVode1", referenced from: 
     _integrate in cca0ChgX.o 
     _docollapse in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
    "_setall", referenced from: 
     _main in cca0ChgX.o 
    "_CVodeFree", referenced from: 
     _integrate in cca0ChgX.o 
     _docollapse in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
    "_genunf", referenced from: 
     _docollapse in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
    "_CVodeMalloc", referenced from: 
     _integrate in cca0ChgX.o 
     _docollapse in cca0ChgX.o 
     _mcwfalg in cca0ChgX.o 
    "_N_VNew", referenced from: 
     _mcwfalg in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
     _main in cca0ChgX.o 
ld: symbol(s) not found 
collect2: ld returned 1 exit status 

Answer 1

你可能需要在數學庫鏈接。添加一個-lm到您的gcc行。

Answer 2

看起來像是缺少一個或多個庫 - 檢查Matlab文檔以瞭解編譯代碼所需的庫。

Answer 3

你錯過了一些圖書館。看看你的代碼使用什麼庫，並將鏈接參數添加到你的gcc行：-l<libname>。您可能還需要添加路徑：-L/path/to/libdir。