如何从C ++调用Fortran moules？ [英] How to call Fortran moules from C++?
问题描述
我想从GNU-C ++源代码调用GNU-Fortran库。那是
可能吗？如果是的话，链接程序需要做什么？
我收到一条错误消息，指出无法找到模块MAIN_
图书馆fortran模块在项目中是众所周知的。如果我尝试使用
为项目添加更多Fortran库，Dev-Cpp完全中止
。
编辑：16： 56
我试着再试一次。因为我无法保存项目，所以我打开了一个新的
。奇怪的是，但现在我在编译时得到了错误消息所以
我必须添加extern void声明。
这里的程序：
#include< windows.h>
#include< conio.h>
extern void qqopen（int，int，char）;
extern void qqpoint（int，int）;
extern void qqline（int， int）;
extern void qqclose（）;
int main（）
{
int ix，iy ;
ix = 1201; iy = 1001;
qqopen（ix，iy，''。\\qqtest.bmp''）;
ix = 10; iy = 10;
qqpoint（ix，iy）;
ix = 1190; iy = 990;
qqline（ix，iy）;
qqclose（）;
}
现在我得到了链接消息，这意味着库模块找不到
。由于这个原因，我暂时没有收到MAIN_
的消息。但我认为它会回来。这里是modlib的toc：
qqbord.o
qqcircle.o
qqclose.o
qqfill.o
qqline.o
qqopen.o
qqor.o
qqplot.o < br $>
qqpoint.o
qqrandom.o
qqwhite.o
这里有实际的消息：
F：\C\Dev-Cpp \ bin \ main.o函数`main''：
[链接错误] undefined引用
`qqopen（int，int，char）''
[链接器错误]未定义引用
`qqpoint（int，int ）''
[链接器错误]未定义引用
`qqline（int，int）''
[链接器错误]未定义引用
`qqclose（）''
F：\ C\Dev-Cpp \ bin \ main.o ld返回1退出状态
F：\ C\Dev-Cpp \ Makefile.win [构建错误] [QQPlot.exe]错误1
我做错了什么？
我想从GNU-C ++源代码调用GNU-Fortran库。这有可能吗？如果是的话，该怎么做才能链接该计划？
我做错了什么？
你做错了就是问错了。我怀疑你能否在新闻组中获得更好的帮助gnu.g ++。帮助
你所拥有的是一个关于a的问题特别的实现，不是关于语言本身的问题，所以它不是clc ++中的热门话题。然而，
人超过gnu.g ++。帮助了解g ++的所有内容，应该能够帮助你。
Cottonwood写道：< blockquote class =post_quotes>我想从GNU-C ++源代码调用GNU-Fortran库。这有可能吗？如果是，那么链接程序需要做什么？
我收到一条错误消息，指出无法找到模块MAIN_
具有fortran模块的库在项目。如果我尝试在项目中添加更多的Fortran库，Dev-Cpp就会完全中止。
编辑：16：56
我试过再次测试。因为我无法保存项目，所以我打开了一个新项目。奇怪的是，但现在我在编译时得到了错误消息，所以我必须添加extern void。这个程序：
#include< windows.h>
#include< conio.h>
extern void qqopen（int，int， char）;
extern void qqpoint（int，int）;
extern void qqline（int，int）;
extern void qqclose（）;
尝试类似
extern" C" void qqopen（int *，int *，char *）;
Fortran肯定不会使用C ++名称修改，也不会按值传递
参数。
要成功链接，您可能需要一个Fortran运行时库。他们的
应该是GNU g77包的一部分，通常称为libg2c.a
或类似的。
Cottonwood写道：我想从GNU-C ++源代码调用GNU-Fortran库。这有可能吗？如果是，那么链接程序需要做什么？
我收到一条错误消息，指出无法找到模块MAIN_
具有fortran模块的库在项目。如果我尝试在项目中添加更多的Fortran库，Dev-Cpp就会完全中止。
编辑：16：56
我试过再次测试。因为我无法保存项目，所以我打开了一个新项目。奇怪的是，但现在我在编译时得到了错误消息，所以我必须添加extern void。这个程序：
#include< windows.h>
#include< conio.h>
extern void qqopen（int，int， char）;
extern void qqpoint（int，int）;
extern void qqline（int，int）;
extern void qqclose（）;
int main（）
{
int ix，iy;
ix = 1201; iy = 1001;
qqopen（ix，iy，''。\\qqtest.bmp''）;
ix = 10; iy = 10;
qqpoint（ix，iy） ;
ix = 1190; iy = 990;
qqline（ix，iy）;
qqclose（）;
}
现在我收到链接消息意味着库模块无法找到了。由于这个原因，我暂时没有收到MAIN_
缺失的消息。但我认为它会回来。这里是modlib的toc：
qqbord.o
qqcircle.o
qqclose.o
qqfill.o
qqline.o
qqopen.o
qqor.o
qqplot.o
qqpoint.o
qqrandom.o
qqwhite.o
这里实际消息：
F：\ C\Dev-Cpp \ bin \ main.o在函数`main''中：
[链接器错误]未定义引用
`qqopen（int，int，char）''
[链接器错误]未定义引用
`qqpoint（int，int）''
[链接器错误]未定义引用
`qqline（int，int）''
[链接器错误]未定义引用
`qqclose（）''
F：\C\Dev-Cpp \ bin \ main .o ld返回1退出状态
F：\C\Dev-Cpp \ Makefile.win [Build Error] [QQPlot.exe]错误1
我做错了什么？
您的''extern''声明应该是externc空隙"为了避免C ++将要做的名称损坏，Fortran没有。这可能是你问题的一部分。
I want to call a GNU-Fortran-library from a GNU-C++ source. Is that
possible at all? If yes, what is to be done to link the program?
I get an error message that says that the module MAIN_ cannot be found.
The library withe the fortran modules is known in the project. If I try
to add more Fortran libraries to the project the Dev-Cpp aborts
completely.
Edit: 16:56
I tried to test again. Because I couldn''t save the project, I opened a
new one. Strange to say but now I got error messages at compile time so
that I had to add the "extern void" statements.
Here the program:
#include <windows.h>
#include <conio.h>
extern void qqopen(int,int,char);
extern void qqpoint(int,int);
extern void qqline(int,int);
extern void qqclose();
int main()
{
int ix, iy;
ix=1201; iy=1001;
qqopen(ix,iy,''.\\qqtest.bmp'');
ix=10;iy=10;
qqpoint(ix,iy);
ix=1190; iy=990;
qqline(ix,iy);
qqclose();
}
Now I get linkage messages meaning that the library modules couldn''d be
found. From this reason I dont get the message with the missing MAIN_
atthis time. But it will come back I think. Here the toc of the modlib:
qqbord.o
qqcircle.o
qqclose.o
qqfill.o
qqline.o
qqopen.o
qqor.o
qqplot.o
qqpoint.o
qqrandom.o
qqwhite.o
And here the actual messages:
F:\C\Dev-Cpp\bin\main.o In function `main'':
[Linker error] undefined reference to
`qqopen(int, int, char)''
[Linker error] undefined reference to
`qqpoint(int, int)''
[Linker error] undefined reference to
`qqline(int, int)''
[Linker error] undefined reference to
`qqclose()''
F:\C\Dev-Cpp\bin\main.o ld returned 1 exit status
F:\C\Dev-Cpp\Makefile.win [Build Error] [QQPlot.exe] Error 1
What am I doing wrong?
Cottonwood wrote:I want to call a GNU-Fortran-library from a GNU-C++ source. Is that
possible at all? If yes, what is to be done to link the program?
[redacted]
What am I doing wrong?
What you''re doing wrong is asking in the wrong group. I suspect you''d
be able to get a lot better help in the newsgroup gnu.g++.help
What you have is a question about a particular implementation, not about
the lanugage itself, so it''s not topical in c.l.c++. However, the
people over gnu.g++.help know all about g++, and should be able to help you.
Cottonwood wrote:I want to call a GNU-Fortran-library from a GNU-C++ source. Is that
possible at all? If yes, what is to be done to link the program?
I get an error message that says that the module MAIN_ cannot be found.
The library withe the fortran modules is known in the project. If I try
to add more Fortran libraries to the project the Dev-Cpp aborts
completely.
Edit: 16:56
I tried to test again. Because I couldn''t save the project, I opened a
new one. Strange to say but now I got error messages at compile time so
that I had to add the "extern void" statements.
Here the program:
#include <windows.h>
#include <conio.h>
extern void qqopen(int,int,char);
extern void qqpoint(int,int);
extern void qqline(int,int);
extern void qqclose();
Try something like
extern "C" void qqopen(int*,int*,char*);
Fortran certainly does not use C++ name mangling and does not pass
parameters by value.
To successfully link you probably need a Fortran runtime library. Their
should be one as part of the GNU g77 package normally called libg2c.a
or similar.
Cottonwood wrote:I want to call a GNU-Fortran-library from a GNU-C++ source. Is that
possible at all? If yes, what is to be done to link the program?
I get an error message that says that the module MAIN_ cannot be found.
The library withe the fortran modules is known in the project. If I try
to add more Fortran libraries to the project the Dev-Cpp aborts
completely.
Edit: 16:56
I tried to test again. Because I couldn''t save the project, I opened a
new one. Strange to say but now I got error messages at compile time so
that I had to add the "extern void" statements.
Here the program:
#include <windows.h>
#include <conio.h>
extern void qqopen(int,int,char);
extern void qqpoint(int,int);
extern void qqline(int,int);
extern void qqclose();
int main()
{
int ix, iy;
ix=1201; iy=1001;
qqopen(ix,iy,''.\\qqtest.bmp'');
ix=10;iy=10;
qqpoint(ix,iy);
ix=1190; iy=990;
qqline(ix,iy);
qqclose();
}
Now I get linkage messages meaning that the library modules couldn''d be
found. From this reason I dont get the message with the missing MAIN_
atthis time. But it will come back I think. Here the toc of the modlib:
qqbord.o
qqcircle.o
qqclose.o
qqfill.o
qqline.o
qqopen.o
qqor.o
qqplot.o
qqpoint.o
qqrandom.o
qqwhite.o
And here the actual messages:
F:\C\Dev-Cpp\bin\main.o In function `main'':
[Linker error] undefined reference to
`qqopen(int, int, char)''
[Linker error] undefined reference to
`qqpoint(int, int)''
[Linker error] undefined reference to
`qqline(int, int)''
[Linker error] undefined reference to
`qqclose()''
F:\C\Dev-Cpp\bin\main.o ld returned 1 exit status
F:\C\Dev-Cpp\Makefile.win [Build Error] [QQPlot.exe] Error 1
What am I doing wrong?
Your ''extern'' declarations should be "extern "c" void" to avoid the
name mangling that C++ will do, that Fortran does not. This is
probably part of your problem.
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