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Fix Autoconf check for development versions (#11532)
When Autoconf version includes also development patch character (for example, 2.72c), such as in unreleased Autoconf versions, this now sets proper number for checking minimum required Autoconf version.
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@ -81,7 +81,7 @@ echo "buildconf: Checking installation"
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min_version=$(sed -n 's/AC_PREREQ(\[\(.*\)\])/\1/p' configure.ac)
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# Check if autoconf exists.
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ac_version=$($PHP_AUTOCONF --version 2>/dev/null|head -n 1|sed -e 's/^[^0-9]*//' -e 's/[a-z]* *$//')
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ac_version=$($PHP_AUTOCONF --version 2>/dev/null|head -n 1|sed -e 's/^[^0-9]*//' -e 's/[^0-9.]*$//')
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if test -z "$ac_version"; then
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echo "buildconf: autoconf not found." >&2
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