Autotools: Normalize PHP_ADD_BUILD_DIR 1st argument #15612
Merged
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The m4_normalize(m4_expand([$1])) expands the given argument if it contains M4 macros, and then trims the items together into a space separated string in an intuitive way.
From my tests, I think this is still "safe" to put to PHP-8.4 branch as it already works the same also without m4_normalize() in PHP-8.3 and earlier due to those double quotes used around the 1st argument variable. That's why I'm targeting it already.