configure.ac: only use AS_IF for conditional blocks

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`AS_IF([...])` is more portable, as it respects macro expansions of
`AC_REQUIRE()`.

This is recommended Autoconf best practice, since in nested
conditionals, it is generally unknowable whether some macro invokes
`AC_REQUIRE()` deep down:
https://www.gnu.org/software/autoconf/manual/autoconf-2.71/html_node/Common-Shell-Constructs.html#index-AS_005fIF-1

As a result, the hacky `pkg_config_init` function is not needed
anymore, since any `PKG_*` invocation will ensure that
`PKG_PROG_PKG_CONFIG` will have been called, due to the fact that
`AC_REQUIRE()` will trickle up.

...

This commit is contained in:

David Seifert 2022-11-27 15:35:06 +01:00 committed by Zdenek Kabelac

parent d456c1f3c5

commit 583cb699cf

1 changed files with 236 additions and 238 deletions

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