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Deleting log files led to a problem with the new automake test suite.
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On Mac OS X, the /bin/sh shell has a builtin echo command that does not recognize the -n option for linefeed supression. To keep the test script portable, the script now uses the echo command installed on the machine (usually in /bin/echo). The which function is used to make sure that the echo command is correctly located.
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On FreeBSD, bash is not installed by default, and when it is installed using ports, it is in /usr/local/bin. Using /bin/bash as script directive thus fails to execute the script. Using /bin/sh instead works.
