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autoconf: modernize and modularize

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Use my modular m4 library used for other things as well; update
autoconf macros to 2.71 standard.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2024-06-10 18:24:53 -07:00
parent 33051a296c
commit fefaa2cc5c
35 changed files with 680 additions and 461 deletions
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20
autoconf/m4/pa_lang_seen_list.m4 Normal file
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@ -0,0 +1,20 @@
dnl --------------------------------------------------------------------------
dnl PA_LANG_SEEN_LIST(subset)
dnl
dnl List of the language lang has been used in the configuration
dnl script so far, possibly subset by [subset].
dnl
dnl This relies on overriding _AC_LANG_SET(from, to),
dnl the internal implementation of _AC_LANG.
dnl --------------------------------------------------------------------------
m4_ifndef([_PA_LANG_SET],
[m4_rename([_AC_LANG_SET], [_PA_LANG_SET])dnl
m4_defun([_AC_LANG_SET], [m4_set_add([_PA_LANG_SEEN_SET],[$2])dnl
_PA_LANG_SET($@)])])
AC_DEFUN([PA_LANG_SEEN_LIST],
[m4_set_delete([_pa_lang_seen_subset])dnl
m4_pushdef([_pa_lang_seen_subset_list],m4_ifnblank([$1],[$1],m4_dquote(m4_set_list([_PA_LANG_SEEN_SET]))))dnl
m4_set_add_all([_pa_lang_seen_subset],_pa_lang_seen_subset_list)dnl
m4_cdr(m4_set_intersection([_pa_lang_seen_subset],[_PA_LANG_SEEN_SET]))dnl
m4_popdef([_pa_lang_seen_subset_list])])