Hi,
Cygwin64 now offers a choice among 4.9.2-3, 4.9.3-1, and 5.2.0-1. I
have the last one installed, and in addition a recently built 6.0 on my
Haswell laptop. I’m fairly certain I have used the 4.9.3 successfully
in the past. It looks like you need to update to the current gmp and
mpfr. Normally, cygwin install.exe would tell you to do that if you
install a gcc and gfortran built against those.
I just installed 5.2.0, and got the same warning about mismatched
libraries and the same segfault.
If you really wanted 4.9.3-1 running against the older gmp and mpfr, you
could build it yourself.
The library versions are *newer* than what both 4.9.3 and 5.2.0 from the
distribution are built against. This may or may not be the cause of the
problem; either way gfortran is currently broken on Cygwin 64.
If your sytem is running fine, don't upgrade :-)
Building gfortran myself under Cygwin has not been a happy experience
for me in the past (although I do it quite regularly on Linux, of
course). Maybe I'll give it a spin.
Regards
Thomas
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