指定 gfortran 应在其中查找模块的目录 [英] Specify directory where gfortran should look for modules

问题描述

我目前编译基于模块的程序(如主程序foo依赖于模块bar)如下:

I currently compile programs based on modules (such as main program foo which depends on module bar) as follows:

gfortran -c bar.f90
gfortran -o foo.exe foo.f90 bar.o

当 foo.f90 和 bar.f90 在同一目录中时，这可以正常工作.当我在 foo.f90 中调用 use bar 时，如何指定 gfortran 应在其中查找 bar.o 的目录?(即我不想指定编译器应该专门链接 bar.o，我只想让它去找到它.)

This works fine when foo.f90 and bar.f90 are in the same directory. How do I specify a directory where gfortran should look for bar.o when I call use bar in foo.f90? (i.e. I don't want to specify that the compiler should link bar.o specifically, I just want it to go find it.)

推荐答案

您可以使用 -I 编译器标志告诉 gfortran 模块文件(.mod 文件)的位置.此外，您可以使用 -J 编译器标志告诉编译器将已编译模块放在何处.请参阅 gfortran 手册页中的目录搜索选项"部分.

You can tell gfortran where your module files (.mod files) are located with the -I compiler flag. In addition, you can tell the compiler where to put compiled modules with the -J compiler flag. See the section "Options for directory search" in the gfortran man page.

我使用它们将我的对象(.o 文件)和我的模块文件放在同一个目录中，但与我的所有源文件放在不同的目录中，所以我不会弄乱我的源目录.例如，

I use these to place both my object (.o files) and my module files in the same directory, but in a different directory to all my source files, so I don't clutter up my source directory. For example,

SRC = /path/to/project/src
OBJ = /path/to/project/obj
BIN = /path/to/project/bin

gfortran -J$(OBJ) -c $(SRC)/bar.f90 -o $(OBJ)/bar.o
gfortran -I$(OBJ) -c $(SRC)/foo.f90 -o $(OBJ)/foo.o
gfortran -o $(BIN)/foo.exe $(OBJ)/foo.o $(OBJ)/bar.o

虽然在命令行上输入上述内容看起来很费力，但我通常在我的 makefile 中使用这个想法.

While the above looks like a lot of effort to type out on the command line, I generally use this idea in my makefiles.

仅供参考，等效的英特尔 fortran 编译器标志是 -I 和 -module.本质上，ifort 将 -J 选项替换为 -module.注意module后面有空格，J后面没有.

Just for reference, the equivalent Intel fortran compiler flags are -I and -module. Essentially ifort replaces the -J option with -module. Note that there is a space after module, but not after J.

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