Re: gcc2-2.95.3-7 uploaded

[Charles Wilson <cwilson at ece dot gatech dot edu>]

Christopher Faylor wrote:

> This should fix the problem with finding libstdc++.a.  For the record,
> libstdc++.a has been renamed to libstdc++-2.a in this package.  I've
> used this version to successfully compile Chuck's test case (thanks
> again, Chuck).

All of the small test programs in dllhelpers (0.4.0, but modified 
slightly; new release soon) compile with this release; all you have to 
do is 'export CC=gcc-2; export CXX=g++-2; export FC=g77-2' and you're 
golden.

This includes C, C++, and Fortran tests -- as well as autotool-driven 
tests.  And yes, they do link with the "correct" libstdc++ library.

A few nits: the info files are fouled up.  For some reason, all of the 
internal references are to e.g. 'gcc-2-2.info' instead of 'gcc-2.info' 
Once I ran them all thru a sed script  --- and fixed up the dir file -- 
all was well.


> This release also includes a couple of spec file tweaks (adds
> libmingwex.a to the -mno-cygwin case) and it includes g77-2.exe.
> g77-2.exe is completely untested, however.  And, it will always be thus.

*I* briefly tested g77-2.  It worked for me; YMMV.

I tested a barebones C dll with auto-import and -mno-cygwin.  It worked.

Now for the bad news...

Using the attached example, I set CXX=`pwd`/mg++  and then ran make. 
While the DLL was built correctly, I had problems compiling the usedll.c 
file:

mg++ -c -I.  -g  -o usedll.o usedll.cc
In file included from /usr/include/mingw/g++-3/streambuf.h:36,
                 from /usr/include/mingw/g++-3/iostream.h:31,
                 from /usr/include/mingw/g++-3/iostream:6,
                 from usedll.cc:1:
/usr/include/mingw/g++-3/libio.h:59: sys/cdefs.h: No such file or directory
make: *** [usedll.o] Error 1

Now, the official cygwin packages don't put anything in 
/usr/include/mingw/g++-3/ at all -- that's why we've always in the past 
had to 'cd /usr/include/mingw; ln -s ../g++-3 g++-3'.

However, I've got a "cygwin host, mingw-target" cross compiler that 
actually puts the real deal into /usr/include/mingw/g++-3 -- but, 
perhaps I have a version mismatch.  So, I  moved my custom stuff out of 
the way, created the symlink...

Unfortunately, that didn't work either.  So there's some problem with 
the C++ headers and 'g++-2 -mno-cygwin'

> I'm still working on rebuilding gcc3. 

Weeelll, using gcc-3.1.1, building the 'C' dllhelper worked fine, but 
once again, the C++ example failed:

g++ -c -I.  -g  -o usedll.o usedll.cc
usedll.cc:1:20: iostream: No such file or directory
usedll.cc: In function `int main()':
usedll.cc:10: `cout' undeclared (first use this function)
usedll.cc:10: (Each undeclared identifier is reported only once for each
   function it appears in.)
usedll.cc:11: `endl' undeclared (first use this function)
make: *** [usedll.o] Error 1

So, after doing 'export CPPFLAGS=-I/usr/include/c++/3.1.1' (*) and 
trying again, all *kinds* of terrible things happened:

g++ -c -I. -I/usr/include/c++/3.1.1 -g  -o usedll.o usedll.cc
In file included from usedll.cc:1:
/usr/include/c++/3.1.1/iostream:44:28: bits/c++config.h: No such file or 
directory
In file included from /usr/include/c++/3.1.1/ios:44,
                 from /usr/include/c++/3.1.1/ostream:45,
                 from /usr/include/c++/3.1.1/iostream:45,
                 from usedll.cc:1:
/usr/include/c++/3.1.1/iosfwd:44:28: bits/c++config.h: No such file or 
directory
In file included from /usr/include/c++/3.1.1/iosfwd:45,
                 from /usr/include/c++/3.1.1/ios:44,
                 from /usr/include/c++/3.1.1/ostream:45,
                 from /usr/include/c++/3.1.1/iostream:45,
                 from usedll.cc:1:
....(much more)....

(*) first off, that *can't* be right, can it?  shouldn't the C++ headers 
be installed in /usr/include/g++-v3/, not /usr/include/c++/3.1.1/ ?

Well, after doing a blind 'cd /usr/include; mv c++/3.1.1 g++-v3' and 
trying again, no joy with -I/usr/include/g++-v3 or without any extra -I's.

I'm stumped.

Summary:
  gcc2-2.95.3-7: gcc-2 g++-2, and g77-2 seem to work in 'cygwin' mode
    gcc-2 works in -mno-cygwin mode
    g++-2 does not  (didn't test g77-2 -mno-cygwin)
    info files scrogged
  gcc-3.1.1
    gcc seems to work
    g++ does not

--Chuck

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