Re: Windows can use cpp in c code but in linux ?? I dont know how.

[mojtaba mahdavi <mahdavi110@gmail.com>]

Hi.

Thanks for your reply. 
you told me to use following command.

>gcc a.c mylib.a -lstdc++

Now. who is the compiler. C or C++  ?
If C ? I got what I wanted. 
If C++ ? I do not want it to compile my code. Since I want to use C as
my compiler not C++.

Sincerely all. 

mahdavi.

On Thu, 30 Sep 2004 18:49:53 -0700, Suciu Flavius
<suciuflavius@tiscali.de> wrote:
> Hi,
> 
> Your solution is a partial solution, because you "migration" require
> also the C++ library to be linked.
> 
> First, of course it's possible ;)
> 
> Second, under windoze you compiler it's smart (or dumb enought) to link
> automaticly with the c++ library.
> 
> Under Linux, gcc it's a pure c compiler, it never link agains c++
> library, so "the misterious" messages refer to the missing c++ library
> because you code do references for operator new and delete ;)
> 
> To solve this is easy, link with the c++ library: -lstdc++
> 
> gcc a.c mylib.a -lstdc++
> 
> Third, welcom in the Linux world :)
> 
> Regards, and don't forget, under Linux EVERYTHING is possible :D
> 
> 
> 
> 
> mojtaba mahdavi wrote:
> > Hi all.
> >
> > I am a windows programmer and want to migrate my codes to linux.
> >
> > My problem is as followes.
> >
> > I want to use cpp (File1.cpp) codes in c (File2.c) codes.
> >
> > in windows I have done following and it is ok.
> >
> > 1- I wrote a cpp code (Wrap.cpp) that wraps my cpp code (File1.cpp) and
> > compiled it using cpp compiler.
> > ( my strategy: for every method I wrote a c function that calls the methode.
> > each function gets a void * to the class handle and ... )
> >
> > 2- I exported my wrapper functions as C interfaces using extern "C". (Wrap.h)
> >
> > 3- in File2.c I used wrap.h and compiled it as a c code. every thing is fine.
> >
> > Now I have trouble with linux to do that (because I am a newbie in linux).
> >
> > at first, is it possible in linux ?? ( I think it must be possible ).
> >
> > secondly, How do I it.
> >
> > actually I have done above in linux but I got some error message.
> >
> > My strateghy is as follows.
> >
> > 1- complie file1.cpp and wrap.cpp using gcc and making file1.o and
> > wrap.o. it is ok.
> > 2- making library using ar command. it is ok. (mylib.a)
> > 3- compile and link file2.c with mylib.a ..???????!!!!!!!!
> >       this generates an error.
> >               it says :
> >
> > ./libmylib.a(wrap.o)(.text+0xc):wrap.cpp: undefined reference to `
> > ___gxx_personality_sj0'
> > ./libmylib.a(wrap.o)(.text+0x44):wrap.cpp: undefined reference to
> > `operator new(unsigned)'
> > ./libmylib.a(wrap.o)(.text+0x85):wrap.cpp: undefined reference to
> > `operator delete(void*)'
> > ./libmylib.a(wrap.o)(.text+0xeb):wrap.cpp: undefined reference to
> > `operator delete(void*)'
> > collect2: ld returned 1 exit status
> >
> >
> > NOW.
> >
> > what should I do ????
> > -
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