鏈接與gfortran

Question

在C++庫中的語法，如果我想要做一個自定義編譯（意爲連接額外的庫），我通常做到以下幾點：

g++ filename -o outputname -I/include_libraries_here -L/link_libraries_here -rpath=path_for_dynamic_linking_here 

我會如何做類似的事情使用gfortran。我試過了：

gfortran filename -o outputname -I/include_libraries_here -L/link_libraries_here -rpath=path_for_dynamic_linking_here 

到目前爲止，語法-I和-L的工作，這表明我設法鏈接和包含庫。然而，gfortran似乎並不認爲rpath是一個有效的命令。

請讓我知道，謝謝。

Answer 1

在鏈接過程中不必使用rpath。當然可以。

到這裏看看：

#include <stdio.h> 

void fun() { 
    printf("Hello from C\n"); 
} 

我們可以創建共享庫這樣的：

gcc -fPIC -shared -o libfun.so fun.c 

然後，我們可以編譯如下代碼：

program hello 
    print *, "Hello World!" 
    call fun() 
end program hello 

這樣的：

# without -rpath 
gfortran -fno-underscoring -o hello -L. -lfun hello.f90 
# in this case you have to make sure libfun.so is in LD_LIBRARY_PATH 

# with rpath 
gfortran -fno-underscoring -o hello -L. -Wl,-rpath=`pwd` -lfun hello.f90 
# in this case, library will be properly located at runtime 

這將允許調用函數從LIB

./hello 
Hello World! 
Hello from C 

-rpath共享是LD的說法

-rpath=dir 
      Add a directory to the runtime library search path. This is used when linking an ELF executable with shared objects. All -rpath arguments are concatenated 
      and passed to the runtime linker, which uses them to locate shared objects at runtime. 

有用的鏈接：

http://www.yolinux.com/TUTORIALS/LinuxTutorialMixingFortranAndC.html