EnvironmentSetup/Windows/CygwinErrors

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Possible Cygwin errors exhibited when using CPAN

• I got an error message from CPAN somewhat like the following:

C:\cygwin\bin\perl.exe: *** unable to remap C:\cygwin\bin\cygiconv-2.dll to same

address as parent(0x7C0000) != 0x7D0000

To fix this, I had to exit the Cygwin shell, run cmd.exe, then type "c:\cygwin\bin\ash.exe" to start the minimal shell, then type "/bin/rebaseall". Then CPAN worked when I ran it again.

• I got another error when cygwin was performing "make install":

ERROR: Can't create '/usr/bin'; Do not have write permissions on '/usr/bin'

I can actually write to /usr/bin; however when I do "ls -ld /usr/bin", cygwin reports no write permission; and "chmod u+w /usr/bin" gives "Permission denied". This causes the install process to fail when it checks permissions. As a kludge, I installed vim, and edited line 368 of /usr/lib/perl5/5.10/ExtUtils/Install.pm, replacing this:

return -w $dir;

with this:

return 1;

which allowed installation to proceed.