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The manual says: "This macro should be used instead of plain ‘if’ in code outside of an ‘AC_DEFUN’ macro, when the contents of the ‘if’ use ‘AC_REQUIRE’ directly or indirectly". Since one cannot know whether something is going to be AC_REQUIRED indirectly, it is safer to just always use AS_IF. Signed-off-by: Jan Engelhardt <jengelh@inai.de>
The use of `-a` is non-portable, and it has been actively removed from POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/utilities/test.html>. Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Jan Engelhardt <jengelh@inai.de>
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