configure.ac: autoconf-2.70 fix #58
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Gentoo-bug: https://bugs.gentoo.org/750230 Signed-off-by: Lars Wendler <polynomial-c@gentoo.org>
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This was previously reported downstream at Gentoo: https://bugs.gentoo.org/750230
autoconf-2.70 changed behavior when using
$@inAC_DEFINE_UNQUOTEDwhich results in the string getting a newline after each element and that later makes the configure run fail. Changing this to$*fixes the issue.The change to
AC_PREREQis not really required for autoconf-2.70 (especially not settiong it to2.69vaule) but I could only test the fix with autoconf-2.69 and autoconf-2.70 and given that v2.69 is nearly eight years old already I don't see a problem in rasing the version requirement here.