[ANNOUNCEMENT] Updated: experimental package: gcc4-4.3.2-2

Sat Mar 14 02:54:00 GMT 2009

Angelo Graziosi wrote:
> Still continuing to test...
>> Marco Atzeri wrote:
>> if I had ./test_program I see the output on the screen but
>>>> ./test_program > test_output
>> leave test_output empty.
>> If I build that tst case with:
>> gfortran-4 test_program.F -o test_program
>> then
>> $ ./test_program.exe
> SUCCESS
>> $ ./test_program.exe > test_output
>> $ cat test_output
> SUCCESS

 Hmm, doesn't work here. 1.5 or 1.7? This is 1.7:
admin@ubik /tmp/fortran/hw
$ cat hw.F
 program main
 WRITE(*,*) 'SUCCESS'
 end
admin@ubik /tmp/fortran/hw
$ gfortran-4 hw.F -o test_program
admin@ubik /tmp/fortran/hw
$ ./test_program.exe > test_output
admin@ubik /tmp/fortran/hw
$ cat test_output
admin@ubik /tmp/fortran/hw
$ cygcheck ./test_program.exe
F:\cygwin-1.7\tmp\fortran\hw\test_program.exe
 F:\cygwin-1.7\bin\cygwin1.dll
 C:\WINNT\system32\ADVAPI32.DLL
 C:\WINNT\system32\NTDLL.DLL
 C:\WINNT\system32\KERNEL32.DLL
 C:\WINNT\system32\RPCRT4.DLL
 F:\cygwin-1.7\bin\cyggcc_s-1.dll
 F:\cygwin-1.7\bin\cyggfortran-3.dll
admin@ubik /tmp/fortran/hw
> But if I build with:
>> gfortran-4 -shared test_program.F -o test_program
>> then
>> $ ./test_program.exe
> bash: ./test_program.exe: Permission denied
>> i.e. it does not work at all!
>> What am I missing?

 -shared is not (surprisingly) the opposite of -static!
 -static means link your app against static libs, not DLLs.
 -shared means build your app as a DLL, not an EXE!
 In particular, if you have '-shared', gcc adds '-e __cygwin_dll_entry@12' to
the linker flags, which means that it gets a DllMain function for its
entrypoint instead of your standard main(argc, argv).
 If you want to link against shared DLLs, you need add no options at all;
that's the default for all the languages (except plain C).
 cheers,
 DaveK
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