On 4/14/11 11:49 AM, "Eric Blake" <eblake@xxxxxxxxxx> wrote: >[please don't top-post on technical lists] I have much to learn =) > >On 04/14/2011 12:39 PM, Too, Justin A. wrote: >> Hi Eric, >> >> Sorry, here you are: > >Thanks. > >> >> I've tried many permutations of quoting, but obviously I'm missing a >> fundamental understanding for this use case: >> >> ------------------------------------------------------------------------ >> >> AC_DEFUN([SUPPORT_TEST], >> [ >> AC_MSG_CHECKING([for test]) >> >> test_executable="$$][(top_builddir)/scripts/test/bin/my_test" > >Why the $$ here? M4 doesn't give $$ any special treatment, and the m4 >end-quote/start-quote sequence of ][ doesn't really matter. You ended >up creating the following line of shell code: > >test_executable="$$(top_builddir)/scripts/test/bin/my_test" > >and, at shell time, $$ is the process id, explaining your results. I think in my rush, I was confusing Automake/m4 issues, hence the '$$', since I was trying to keep the '$'. > >> AC_SUBST(QMTEST, [$test_executable]) > >While this line works as-is (provided QMTEST is not an m4 macro name), >you are better off getting in the habit of recommended quoting style: > >AC_SUBST([QMTEST], [$test_executable]) > >> >> 22839(top_builddir)/scripts/test_harness/test/bin/my_test >> >> I need >> >> $(top_builddir)/scripts/test_harness/test/bin/my_test > >Then use: > >test_executable="\$(top_builddir)/scripts/test/bin/my_test" > >to get a literal $ into the contents of $test_executable, or: > >test_executable="$top_builddir/scripts/test/bin/my_test" > >if you wanted the shell to expand $top_builddir prior to assigning to >$test_executable. At any rate, neither line variant contains anything >that requires extra m4 quoting or escaping. > >-- >Eric Blake eblake@xxxxxxxxxx +1-801-349-2682 >Libvirt virtualization library http://libvirt.org > Thank you for your help, everything is good to go now. Justin > _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
