Marvin wrote:Some time ago, I had the same problem with libf2c and the missing main() function. A possible solution is the following: make a copy of libf2c.a, named e.g. lib my_f2c.a and delete the object file main.o from that library using the unix command
>I'm trying to add some graphics features to a C++ program for scientific
>calculation that I wrote some time ago. I chose V because it seemed easy
>to learn and portable.
>So far, I've been able to use the vTextCanvasPane to display the numerical
>results, and the vCanvasPane to plot the graphics. The problem is that I'm
>not able to put the 2 different canvases in the same application;
First of all, thanks to Bruce Wampler, Nikolai Tkachenko and Tom Hilinski
for their precious help.
Now my Test application has two vCmdWindows (a vTextEditor and a
vCanvasPane); yesterday I used them to display the entries of a matrix and
the plot of a cosine, and they worked all right. It seemed to me that my
problems were over, so I started to add my C++ classes (the ones that make
the actual calculation), to the Test app.
Here I've found out that I have a horrible problem: my classes need to link
various local math libraries that we have here at Department of Mechanics;
they are very old ones, automatically translated by F2c from Fortran to C,
so they need to link the well-known libF2c.a library, that provides them
with the proper environment (typedefs, function calls, defines, etc.)
The problem is that libF2c.a needs that somewhere a function main() is defined:
>g++ -o ter.exe -O -LC:/cygwin/v/lib -L/local/lib ./terapp.o ./tercnv.o
>.o ./tedcnv.o ./tedcmdw.o ./matrici.o -lsysln -leigen -lalloc -lF2c -lV
> -lm -mwindows
>ing: cannot find entry symbol _WinMainCRTStartup; defaulting to 00401000
>/local/lib/libF2c.a(main.o)(.text+0x1a4):main.c: undefined reference to
>collect2: ld returned 1 exit status
>make: *** [ter.exe] Error 1
If I add a fake main
anywhere in the code, the program links without errors, but then it does
nothing. I understand that this is due to the fact that some sort of main
for my V application is provided at linktime by the operating system, if
none is found.
So my question is: is it possible to force the linker to override the fake
main, so that I can cheat libF2c.a, and have the V appMain started as well?
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