mirror of https://git.tukaani.org/xz.git
Fix bugs and otherwise improve ax_check_capsicum.m4.
AU_ALIAS was removed because the new version is incompatible
with the old version.
It no longer checks for <sys/capability.h> separately.
It's enough to test for it as part of AC_CHECK_DECL.
The defines HAVE_CAPSICUM_SYS_CAPSICUM_H and
HAVE_CAPSICUM_SYS_CAPABILITY_H were removed as unneeded.
HAVE_SYS_CAPSICUM_H from AC_CHECK_HEADERS is enough.
It no longer does a useless search for the Capsicum library
if the header wasn't found.
Fixed a bug in ACTION-IF-FOUND (the first argument). Specifying
the argument omitted the default action but the given action
wasn't used instead.
AC_DEFINE([HAVE_CAPSICUM]) is now always called when Capsicum
support is found. Previously it was part of the default
ACTION-IF-FOUND which a custom action would override. Now
the default action only prepends ${CAPSICUM_LIB} to LIBS.
The documentation was updated.
Since there as no serial number, "#serial 2" was added.
This commit is contained in:
Lasse Collin
parent
6e845c6a3e
commit
29a087fb5a
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@ -2,23 +2,26 @@
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# SYNOPSIS
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#
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# AX_CHECK_CAPSICUM([action-if-found[, action-if-not-found]])
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# AX_CHECK_CAPSICUM([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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#
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# DESCRIPTION
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#
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# This macro searches for an installed Capsicum library, and if found:
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# - calls one of AC_DEFINE([HAVE_CAPSICUM_SYS_CAPSICUM_H]) or
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# AC_DEFINE([HAVE_CAPSICUM_SYS_CAPABILITY_H])
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# - sets CAPSICUM_LIB to the -l option needed to link Capsicum support.
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# This macro searches for an installed Capsicum header and library,
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# and if found:
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# - AC_DEFINE([HAVE_CAPSICUM]) is called.
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# - AC_DEFINE([HAVE_SYS_CAPSICUM_H]) is called if <sys/capsicum.h>
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# is present (otherwise <sys/capability.h> must be used).
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# - CAPSICUM_LIB is set to the -l option needed to link Capsicum support,
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# and AC_SUBST([CAPSICUM_LIB]) is called.
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# - The shell commands in ACTION-IF-FOUND are run. The default
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# ACTION-IF-FOUND prepends ${CAPSICUM_LIB} into LIBS. If you don't
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# want to modify LIBS and don't need to run any other commands either,
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# use a colon as ACTION-IF-FOUND.
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#
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# If either the header file or the library is not found,
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# shell commands 'action-if-not-found' is run.
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#
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# If both header file and library are found, shell commands
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# 'action-if-found' is run. If 'action-if-found' is not specified, the
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# default action:
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# - calls AC_DEFINE(HAVE_CAPSICUM)
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# - prepends ${CAPSICUM_LIB} to LIBS.
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# If Capsicum support isn't found:
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# - The shell commands in ACTION-IF-NOT-FOUND are run. The default
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# ACTION-IF-NOT-FOUND calls AC_MSG_WARN to print a warning that
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# Capsicum support wasn't found.
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#
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# You should use autoheader to include a definition for the symbols above
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# in a config.h file.
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@ -26,61 +29,57 @@
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# Sample usage in a C/C++ source is as follows:
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#
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# #ifdef HAVE_CAPSICUM
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# # ifdef HAVE_CAPSICUM_SYS_CAPSICUM_H
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# # ifdef HAVE_SYS_CAPSICUM_H
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# # include <sys/capsicum.h>
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# # else
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# # ifdef HAVE_CAPSICUM_SYS_CAPABILITY_H
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# # include <sys/capability.h>
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# # endif
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# # include <sys/capability.h>
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# # endif
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# #endif /* HAVE_CAPSICUM */
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#
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# LICENSE
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#
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# Copyright (c) 2014 Google Inc.
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# Copyright (c) 2015 Lasse Collin <lasse.collin@tukaani.org>
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#
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# Copying and distribution of this file, with or without modification,
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# are permitted in any medium without royalty provided the copyright
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# notice and this notice are preserved. This file is offered as-is,
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# without any warranty.
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AU_ALIAS([CHECK_CAPSICUM], [AX_CHECK_CAPSICUM])
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AC_DEFUN([AX_CHECK_CAPSICUM],
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[AC_CHECK_HEADERS([sys/capability.h sys/capsicum.h])
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capsicum_hdrfound=false
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# If <sys/capsicum.h> exists (Linux, FreeBSD>=11.x), assume it is the correct header.
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if test "x$ac_cv_header_sys_capsicum_h" = "xyes" ; then
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AC_DEFINE([HAVE_CAPSICUM_SYS_CAPSICUM_H],[],[Capsicum functions declared in <sys/capsicum.h>])
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capsicum_hdrfound=true
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elif test "x$ac_cv_header_sys_capability_h" = "xyes" ; then
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# Just <sys/capability.h>; on FreeBSD 10.x this covers Capsicum, but on Linux it
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# describes POSIX.1e capabilities. So check it declares cap_rights_limit.
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AC_CHECK_DECL([cap_rights_limit],
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[AC_DEFINE([HAVE_CAPSICUM_SYS_CAPABILITY_H],[],[Capsicum functions declared in <sys/capability.h>])
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capsicum_hdrfound=true],[],
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[#include <sys/capability.h>])
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#serial 2
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AC_DEFUN([AX_CHECK_CAPSICUM], [
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# On FreeBSD >= 11.x and Linux, Capsicum is uses <sys/capsicum.h>.
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# If this header is found, it is assumed to be the right one.
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capsicum_header_found=no
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AC_CHECK_HEADERS([sys/capsicum.h], [capsicum_header_found=yes])
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if test "$capsicum_header_found" = no ; then
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# On FreeBSD 10.x Capsicum uses <sys/capability.h>. Such a header exists
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# on Linux too but it describes POSIX.1e capabilities. Look for the
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# declaration of cap_rights_limit to check if <sys/capability.h> is
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# a Capsicum header.
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AC_CHECK_DECL([cap_rights_limit], [capsicum_header_found=yes], [],
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[#include <sys/capability.h>])
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fi
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AC_LANG_PUSH([C])
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# FreeBSD >= 10.x has Capsicum functions in libc
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capsicum_libfound=false
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AC_LINK_IFELSE([AC_LANG_CALL([], [cap_rights_limit])],
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[capsicum_libfound=true],[])
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# Linux has Capsicum functions in libcaprights
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AC_CHECK_LIB([caprights],[cap_rights_limit],
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[AC_SUBST([CAPSICUM_LIB],[-lcaprights])
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capsicum_libfound=true],[])
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AC_LANG_POP([C])
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capsicum_lib_found=no
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CAPSICUM_LIB=
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if test "$capsicum_header_found" = yes ; then
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AC_LANG_PUSH([C])
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# FreeBSD >= 10.x has Capsicum functions in libc.
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AC_LINK_IFELSE([AC_LANG_CALL([], [cap_rights_limit])],
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[capsicum_lib_found=yes], [])
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# Linux has Capsicum functions in libcaprights.
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AC_CHECK_LIB([caprights], [cap_rights_limit],
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[CAPSICUM_LIB=-lcaprights
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capsicum_lib_found=yes], [])
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AC_LANG_POP([C])
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fi
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AC_SUBST([CAPSICUM_LIB])
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if test "$capsicum_hdrfound" = "true" && test "$capsicum_libfound" = "true"
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then
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# If both library and header were found, action-if-found
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m4_ifblank([$1],[
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LIBS="${CAPSICUM_LIB} $LIBS"
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AC_DEFINE([HAVE_CAPSICUM],[],[Capsicum library available])])
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if test "$capsicum_lib_found" = yes ; then
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AC_DEFINE([HAVE_CAPSICUM], [1], [Define to 1 if Capsicum is available.])
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m4_default([$1], [LIBS="${CAPSICUM_LIB} $LIBS"])
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else
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# If either header or library was not found, action-if-not-found
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m4_default([$2],[AC_MSG_WARN([Capsicum support not found])])
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m4_default([$2], [AC_MSG_WARN([Capsicum support not found])])
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fi])
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