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dnl Check a program for version sanity. The test runs a program, passes it an
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dnl argument to make it print out some identification string, and filters that
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dnl output with a regular expression. If the output is non-empty, the program
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dnl passes the sanity check.
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dnl $1 - Name or full path of the program to run
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dnl $2 - Argument to pass to print out identification string
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dnl $3 - grep RE to match identification string
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dnl $4 - set to 1 to make errors only a warning
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AC_DEFUN([CHECK_PROGRAM_SANITY],
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AC_MSG_CHECKING([sanity for program ]$1)
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sanity_path=`which $1 2>/dev/null`
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if test "$?" -eq 0 -a -x "$sanity_path" ; then
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sanity=`$1 $2 2>&1 | grep "$3"`
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if test -z "$sanity" ; then
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if test "$4" -eq 1 ; then
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AC_MSG_WARN([Program ]$1[ failed to pass sanity check.])
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AC_MSG_ERROR([Program ]$1[ failed to pass sanity check.])
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AC_MSG_RESULT([not found])