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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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13
autoconf/m4/pa_add_headers.m4 Normal file
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@ -0,0 +1,13 @@
dnl --------------------------------------------------------------------------
dnl PA_ADD_HEADERS(headers...)
dnl
dnl Call AC_CHECK_HEADERS(), and add to ac_includes_default if found
dnl --------------------------------------------------------------------------
AC_DEFUN([_PA_ADD_HEADER],
[AC_CHECK_HEADERS([$1],[ac_includes_default="$ac_includes_default
#include <$1>"
])
])
AC_DEFUN([PA_ADD_HEADERS],
[m4_map_args_w([$1],[_PA_ADD_HEADER(],[)])])