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bpo-45723: Add helper macros and more caching to configure.ac (GH-29429)

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Almost all checks are now cached by AC_CACHE_CHECK().

Common patterns are replaced by helper macros.

Variable names now use naming scheme ``ac_cv_func_$funcname``,
``ac_cv_lib_$library_$funcname``, or ``ac_cv_header_$headername_h``.

``SYS_SELECT_WITH_SYS_TIME`` is no longer used.

``uuid_create`` and ``uuid_enc_be`` are provided by libc on BSD. It is
safe to use ``AC_CHECK_FUNCS`` here.

Caching speeds up ./configure -C from ~ 4s to 2.6s on my system.

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
This commit is contained in:
Christian Heimes 2021-11-08 09:06:31 +02:00 committed by GitHub
parent 19b107e9b5
commit 57c50c9c7c
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4 changed files with 1361 additions and 1060 deletions
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2
Misc/NEWS.d/next/Build/2021-11-05-15-09-49.bpo-45723.gfSxur.rst Normal file
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configure.ac now uses custom helper macros and ``AC_CACHE_CHECK`` to
simplify and speed up configure runs.

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configure vendored
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configure.ac
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pyconfig.h.in
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@ -118,7 +118,7 @@
/* define to 1 if your sem_getvalue is broken. */
#undef HAVE_BROKEN_SEM_GETVALUE
/* Define if `unsetenv` does not return an int. */
/* Define if 'unsetenv' does not return an int. */
#undef HAVE_BROKEN_UNSETENV
/* Has builtin __atomic_load_n() and __atomic_store_n() functions */
@ -187,7 +187,7 @@
/* Define if you have the 'immedok' function. */
#undef HAVE_CURSES_IMMEDOK
/* Define if you have the 'is_pad' function or macro. */
/* Define if you have the 'is_pad' function. */
#undef HAVE_CURSES_IS_PAD
/* Define if you have the 'is_term_resized' function. */
@ -290,7 +290,7 @@
/* Define to 1 if you have the <endian.h> header file. */
#undef HAVE_ENDIAN_H
/* Define if you have the 'epoll' functions. */
/* Define if you have the 'epoll' function. */
#undef HAVE_EPOLL
/* Define if you have the 'epoll_create1' function. */
@ -559,7 +559,7 @@
/* Define to 1 if you have the `killpg' function. */
#undef HAVE_KILLPG
/* Define if you have the 'kqueue' functions. */
/* Define if you have the 'kqueue' function. */
#undef HAVE_KQUEUE
/* Define to 1 if you have the <langinfo.h> header file. */
@ -779,7 +779,7 @@
/* Define to 1 if you have the `preadv2' function. */
#undef HAVE_PREADV2
/* Define if you have the 'prlimit' functions. */
/* Define if you have the 'prlimit' function. */
#undef HAVE_PRLIMIT
/* Define to 1 if you have the <process.h> header file. */
@ -1287,10 +1287,10 @@
/* Define to 1 if you have the <utime.h> header file. */
#undef HAVE_UTIME_H
/* Define if uuid_create() exists. */
/* Define to 1 if you have the `uuid_create' function. */
#undef HAVE_UUID_CREATE
/* Define if uuid_enc_be() exists. */
/* Define to 1 if you have the `uuid_enc_be' function. */
#undef HAVE_UUID_ENC_BE
/* Define if uuid_generate_time_safe() exists. */