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vm: Adjust FAT serial number code to 32-bit Guile.

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On 32-bit systems, 'string-hash' would raise an out-of-range exception
when the second argument was 2^32.

* gnu/build/vm.scm (make-iso9660-image): Pass 2^32 - 1 to 'string-hash'.
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Ludovic Courtès 2019-04-25 00:43:42 +02:00
parent e7c7b73320
commit ecb33b87aa
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1 changed files with 5 additions and 1 deletions
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6
gnu/build/vm.scm
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@ -473,8 +473,12 @@ GRUB configuration and OS-DRV as the stuff in it."
;; allows for deterministic builds.
(setenv "GRUB_FAT_SERIAL_NUMBER"
(number->string (if volume-uuid
;; On 32-bit systems the 2nd argument must be
;; lower than 2^32.
(string-hash (iso9660-uuid->string volume-uuid)
(expt 2 32))
(- (expt 2 32) 1))
#x77777777)
16))