mirror of
https://git.tukaani.org/xz.git
synced 2024-04-04 12:36:23 +02:00
5f3a742b64
The file was loaded from this web page: https://github.com/google/capsicum-test/blob/dev/autoconf/m4/ax_check_capsicum.m4 Thanks to Loganaden Velvindron for pointing it out for me.
86 lines
3.1 KiB
Text
86 lines
3.1 KiB
Text
# -*- Autoconf -*-
|
|
|
|
# SYNOPSIS
|
|
#
|
|
# AX_CHECK_CAPSICUM([action-if-found[, action-if-not-found]])
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# This macro searches for an installed Capsicum library, and if found:
|
|
# - calls one of AC_DEFINE([HAVE_CAPSICUM_SYS_CAPSICUM_H]) or
|
|
# AC_DEFINE([HAVE_CAPSICUM_SYS_CAPABILITY_H])
|
|
# - sets CAPSICUM_LIB to the -l option needed to link Capsicum support.
|
|
#
|
|
# If either the header file or the library is not found,
|
|
# shell commands 'action-if-not-found' is run.
|
|
#
|
|
# If both header file and library are found, shell commands
|
|
# 'action-if-found' is run. If 'action-if-found' is not specified, the
|
|
# default action:
|
|
# - calls AC_DEFINE(HAVE_CAPSICUM)
|
|
# - prepends ${CAPSICUM_LIB} to LIBS.
|
|
#
|
|
# You should use autoheader to include a definition for the symbols above
|
|
# in a config.h file.
|
|
#
|
|
# Sample usage in a C/C++ source is as follows:
|
|
#
|
|
# #ifdef HAVE_CAPSICUM
|
|
# # ifdef HAVE_CAPSICUM_SYS_CAPSICUM_H
|
|
# # include <sys/capsicum.h>
|
|
# # else
|
|
# # ifdef HAVE_CAPSICUM_SYS_CAPABILITY_H
|
|
# # include <sys/capability.h>
|
|
# # endif
|
|
# # endif
|
|
# #endif /* HAVE_CAPSICUM */
|
|
#
|
|
# LICENSE
|
|
#
|
|
# Copyright (c) 2014 Google Inc.
|
|
#
|
|
# Copying and distribution of this file, with or without modification,
|
|
# are permitted in any medium without royalty provided the copyright
|
|
# notice and this notice are preserved. This file is offered as-is,
|
|
# without any warranty.
|
|
|
|
AU_ALIAS([CHECK_CAPSICUM], [AX_CHECK_CAPSICUM])
|
|
AC_DEFUN([AX_CHECK_CAPSICUM],
|
|
[AC_CHECK_HEADERS([sys/capability.h sys/capsicum.h])
|
|
capsicum_hdrfound=false
|
|
# If <sys/capsicum.h> exists (Linux, FreeBSD>=11.x), assume it is the correct header.
|
|
if test "x$ac_cv_header_sys_capsicum_h" = "xyes" ; then
|
|
AC_DEFINE([HAVE_CAPSICUM_SYS_CAPSICUM_H],[],[Capsicum functions declared in <sys/capsicum.h>])
|
|
capsicum_hdrfound=true
|
|
elif test "x$ac_cv_header_sys_capability_h" = "xyes" ; then
|
|
# Just <sys/capability.h>; on FreeBSD 10.x this covers Capsicum, but on Linux it
|
|
# describes POSIX.1e capabilities. So check it declares cap_rights_limit.
|
|
AC_CHECK_DECL([cap_rights_limit],
|
|
[AC_DEFINE([HAVE_CAPSICUM_SYS_CAPABILITY_H],[],[Capsicum functions declared in <sys/capability.h>])
|
|
capsicum_hdrfound=true],[],
|
|
[#include <sys/capability.h>])
|
|
fi
|
|
|
|
AC_LANG_PUSH([C])
|
|
# FreeBSD >= 10.x has Capsicum functions in libc
|
|
capsicum_libfound=false
|
|
AC_LINK_IFELSE([AC_LANG_CALL([], [cap_rights_limit])],
|
|
[capsicum_libfound=true],[])
|
|
# Linux has Capsicum functions in libcaprights
|
|
AC_CHECK_LIB([caprights],[cap_rights_limit],
|
|
[AC_SUBST([CAPSICUM_LIB],[-lcaprights])
|
|
capsicum_libfound=true],[])
|
|
AC_LANG_POP([C])
|
|
|
|
if test "$capsicum_hdrfound" = "true" && test "$capsicum_libfound" = "true"
|
|
then
|
|
# If both library and header were found, action-if-found
|
|
m4_ifblank([$1],[
|
|
LIBS="${CAPSICUM_LIB} $LIBS"
|
|
AC_DEFINE([HAVE_CAPSICUM],[],[Capsicum library available])])
|
|
else
|
|
# If either header or library was not found, action-if-not-found
|
|
m4_default([$2],[AC_MSG_WARN([Capsicum support not found])])
|
|
fi])
|
|
|
|
|