configure: Avoid breaking compilation if AC_PACKAGE_URL is unavailable when regenerating with older autoconf.
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@ -19,6 +19,10 @@ m4_ifdef([AS_VAR_IF],,[AC_DEFUN([AS_VAR_IF],
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[AS_IF([test "x$$1" = x""$2], [$3], [$4])],
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[eval as_val=\$$1
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AS_IF([test "x$as_val" = x""$2], [$3], [$4])])])])dnl
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dnl autoconf versions before 2.64 don't have AC_PACKAGE_URL
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m4_ifdef([AC_PACKAGE_URL],,
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[AC_DEFINE([PACKAGE_URL], ["http://www.winehq.org"], [Define to the home page for this package.])
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AC_SUBST([PACKAGE_URL], ["http://www.winehq.org"])])dnl
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dnl **** Command-line arguments ****
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