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2012-08-30tests: detect missing perl at configure runtimeStefano Lattarini
* configure.ac (AM_CONDITIONAL): Set the conditional 'HAVE_PERL' to true if the configure-time checks (as run by gl_PERL) have been able to find a working perl. * tests/no-perl: New script, report a diagnostic about "missing perl" and exit with status 77. * tests/Makefile.am (EXTRA_DIST): Distribute it. (TESTSUITE_PERL): New, define to '$(PERL)' if a perl interpreter has been found at configure time (i.e., if the 'HAVE_PERL' automake conditional is true), and to '$(srcdir)/no-perl' otherwise. (LOG_COMPILER): Use $(TESTSUITE_PERL) instead of $(PERL). (XPL_LOG_COMPILER): Likewise. * tests/shell-or-perl: Simplify: no need to actually check whether perl is working.