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Date: Tue, 23 Jun 2015 23:30:11 -0500 (CDT)
From: Satish Balay <balay AT fastmail DOT fm>
To: cygwin AT cygwin DOT com
Subject: using fortran common block from dll created by gfortran
Message-ID: <alpine.LFD.2.11.1506232245380.28689@asterix>
User-Agent: Alpine 2.11 (LFD 23 2013-08-11)
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Hi Cygwin,

I'm debuging an issue with dlls with cygwin gnu compilers - and have
narrowed down the issue to the attached test case [script].

Could you guide me to correct usage of 'fortran common block' with dlls?

[In this example - using fortran 'common block' via static library
works. However the same code using a .dll fails]

Thanks,
Satish

---------

balay AT ps4 ~/junk
$ ./cb_test.sh 
+ cat
+ cat
+ rm -f '*.o' '*.dll' '*.a' '*.exe'
+ gfortran -c cb_func.f cb_main.f
+ ar cr libcb_static.a cb_func.o
+ gfortran cb_main.o -L. -lcb_static -o cb_main_static
+ gfortran -shared -o libcb_dynamic.dll cb_func.o
+ gfortran cb_main.o -L. -lcb_dynamic -o cb_main_dynamic
+ ./cb_main_static
 GOOD COMMON BLOCK
+ ./cb_main_dynamic
 BAD COMMON BLOCK


balay AT ps4 ~/junk
$ uname -a
CYGWIN_NT-6.1 ps4 2.0.4(0.287/5/3) 2015-06-09 12:22 x86_64 Cygwin

balay AT ps4 ~/junk
$ gfortran --version
GNU Fortran (GCC) 4.9.2
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