[Qemu-devel] [Bug 1347555] Re: qemu build failure, hxtool is a bash script, not a /bin/sh script

[Felix von Leitner]

It turns out that expr does not support ^ (at least according to the man
page). :-)

Still, you could do expr -$flag + 1 to do the same thing.

Is the ruckus just about this one place where $(( )) is used or are
there other non-Bourne-shell constructs?

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https://bugs.launchpad.net/bugs/1347555

Title:
  qemu build failure, hxtool is a bash script, not a /bin/sh script

Status in QEMU:
  New

Bug description:
  hxtool (part of the early build process) is a bash script.  Running it
  with /bin/sh yields a syntax error on line 10:

   10             STEXI*|ETEXI*|SQMP*|EQMP*) flag=$(($flag^1))

  $(( expr )) is a bash extension, not part of /bin/sh.

  Note that replacing the sh in the first line in hxtool with /bin/bash
  does not help, because the script is run manually from the Makefile
  with sh:

  154         $(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $<
  > $@,"  GEN   $@")

  The fix is to change those lines to

  154         $(call quiet-command,bash $(SRC_PATH)/scripts/hxtool -h <
  $< > $@,"  GEN   $@")

  (there are five or so).

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