calling C++ from C

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1 total messages Started by John T Riedl Tue, 21 Nov 1989 03:10

#605

Author: John T Riedl
Date: Tue, 21 Nov 1989 03:10

21 lines
1177 bytes

I need to call a g++ routine from a C routine.  I'm having trouble
getting the constructors for external objects called correctly.  It
works fine for g++-1.35 using the g++ linker, since this linker
manages initialization through symbol "__start" defined in crt0+.o.

Under g++-1.36 initialization is handled differently.  When the
compiler recognizes that it is compiling 'main' it compiles in a call
to __main as the first statement of the procedure.  ___main is defined
in libg++.a(gnulib3.o), and handles calling the constructors.

My problem is finding an elegant method for invoking ___main
correctly.  So far the best I've been able to do is to to explicitly
call ___main from my C main program.

Are there better solutions?

Thanks,
John
-- 
John Riedl
{ucbvax,decvax,hplabs}!purdue!riedl  -or-  riedl@cs.purdue.edu

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