[GHC] #14017: "make install" with non-standard umask causes bad permission on package.cache

[GHC]

#14017: "make install" with non-standard umask causes bad permission on
package.cache
-------------------------------------+-------------------------------------
           Reporter:  djf            |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  None           |           Version:  8.2.1-rc3
           Keywords:                 |  Operating System:  Linux
       Architecture:                 |   Type of failure:  Installing GHC
  Unknown/Multiple                   |  failed
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Using Debian 8 binary package ghc-8.2.1-x86_64-deb8-linux.tar.xz to
 install with `configure` and then `su` and `make install`.

 If your umask is 0027 rather than the default 0022, a file doesn't get
 made world-readable.  (Other files in this directory do though.)

 {{{
 $ ls -l /usr/local/lib/ghc-8.2.1/package.conf.d/package.cache
 -rw-r----- 1 root staff 161490 Jul 23 10:02
 /usr/local/lib/ghc-8.2.1/package.conf.d/package.cache
 }}}

 It results in this message when trying to use ghc or ghci:

 {{{
 $ ghci
 GHCi, version 8.2.1: http://www.haskell.org/ghc/  :? for help
 /usr/local/lib/ghc-8.2.1/package.conf.d/package.cache: openBinaryFile:
 permission denied (Permission denied)
 }}}

 (n.b. I have set the version field in this bug to 8.2.1-rc3 for now
 because 8.2.1 isn't in the list yet.)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14017>
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