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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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26
autoconf/m4/pa_have_tcpwrappers.m4 Normal file
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@ -0,0 +1,26 @@
dnl --------------------------------------------------------------------------
dnl PA_HAVE_TCPWRAPPERS
dnl
dnl Do we have the tcpwrappers -lwrap? This can't be done using AC_CHECK_LIBS
dnl due to the need to provide "allow_severity" and "deny_severity" variables
dnl --------------------------------------------------------------------------
AC_DEFUN([PA_HAVE_TCPWRAPPERS],
[AC_CHECK_LIB([wrap], [main])
AC_MSG_CHECKING([for tcpwrappers])
AC_LINK_IFELSE([AC_LANG_PROGRAM(
[[
#include <tcpd.h>
int allow_severity = 0;
int deny_severity = 0;
]],
[[
hosts_ctl("sample_daemon", STRING_UNKNOWN, STRING_UNKNOWN, STRING_UNKNOWN);
]])],
[
AC_DEFINE(HAVE_TCPWRAPPERS, 1,
[Define if we have tcpwrappers (-lwrap) and <tcpd.h>.])
AC_MSG_RESULT([yes])
],
[
AC_MSG_RESULT([no])
])])