G77, libg2c and a linking problem
Angelo Graziosi
Angelo.Graziosi@roma1.infn.it
Tue Sep 19 22:05:00 GMT 2006
Dave Korn wrote:
> Can we then assume that the cernlib build process is doing something
> unneccessary or unusual or incorrect?
What would be 'unusual or incorrect' in
$ cat hello.F
program hello
implicit none
write(*,*) 'Hello!'
end
(1)
$ g77 hello.F -o hello -L/usr/lib/gcc/i686-pc-cygwin/3.4.4 -lg2c
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../libcygwin.a(libcmain.o):(.text+0xab):
undefined reference to `_WinMain@16'
collect2: ld returned 1 exit status
(2)
$ g77 hello.F -L/usr/lib/gcc/i686-pc-cygwin/3.4.4 -lg2c -o hello
$ ./hello
Hello!
?
> It should all become clear in terms of the linker's requirement that
> undefined references must always come in objects earlier than the
> symbols that satisfy those references
I know this...but then '-o hello' contains symbols that satisfy previous
references ?
(compare (1) with (2))
Cheers,
Angelo.
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