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acinclude.m4
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# from http://autoconf-archive.cryp.to/ax_tls.html
#
# This was licensed under the GPL with the following exception:
#
# As a special exception, the respective Autoconf Macro's copyright
# owner gives unlimited permission to copy, distribute and modify the
# configure scripts that are the output of Autoconf when processing
# the Macro. You need not follow the terms of the GNU General Public
# License when using or distributing such scripts, even though
# portions of the text of the Macro appear in them. The GNU General
# Public License (GPL) does govern all other use of the material that
# constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the
# Autoconf Macro released by the Autoconf Macro Archive. When you make
# and distribute a modified version of the Autoconf Macro, you may
# extend this special exception to the GPL to apply to your modified
# version as well.
#
AC_DEFUN([AX_TLS], [
AC_MSG_CHECKING(for thread local storage (TLS) class)
AC_CACHE_VAL(ac_cv_tls, [
ax_tls_keywords="__thread __declspec(thread) none"
for ax_tls_keyword in $ax_tls_keywords; do
case $ax_tls_keyword in
none) ac_cv_tls=none ; break ;;
*)
AC_TRY_COMPILE(
[#include <stdlib.h>
static void
foo(void) {
static ] $ax_tls_keyword [ int bar;
exit(1);
}],
[],
[ac_cv_tls=$ax_tls_keyword ; break],
ac_cv_tls=none
)
esac
done
])
if test "$ac_cv_tls" != "none"; then
dnl AC_DEFINE([TLS], [], [If the compiler supports a TLS storage class define it to that here])
AC_DEFINE_UNQUOTED([TLS], $ac_cv_tls, [If the compiler supports a TLS storage class define it to that here])
fi
AC_MSG_RESULT($ac_cv_tls)
])
# ===========================================================================
# http://www.nongnu.org/autoconf-archive/check_gnu_make.html
# ===========================================================================
#
# SYNOPSIS
#
# CHECK_GNU_MAKE()
#
# DESCRIPTION
#
# This macro searches for a GNU version of make. If a match is found, the
# makefile variable `ifGNUmake' is set to the empty string, otherwise it
# is set to "#". This is useful for including a special features in a
# Makefile, which cannot be handled by other versions of make. The
# variable _cv_gnu_make_command is set to the command to invoke GNU make
# if it exists, the empty string otherwise.
#
# Here is an example of its use:
#
# Makefile.in might contain:
#
# # A failsafe way of putting a dependency rule into a makefile
# $(DEPEND):
# $(CC) -MM $(srcdir)/*.c > $(DEPEND)
#
# @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
# @ifGNUmake@ include $(DEPEND)
# @ifGNUmake@ endif
#
# Then configure.in would normally contain:
#
# CHECK_GNU_MAKE()
# AC_OUTPUT(Makefile)
#
# Then perhaps to cause gnu make to override any other make, we could do
# something like this (note that GNU make always looks for GNUmakefile
# first):
#
# if ! test x$_cv_gnu_make_command = x ; then
# mv Makefile GNUmakefile
# echo .DEFAULT: > Makefile ;
# echo \ $_cv_gnu_make_command \$@ >> Makefile;
# fi
#
# Then, if any (well almost any) other make is called, and GNU make also
# exists, then the other make wraps the GNU make.
#
# LICENSE
#
# Copyright (c) 2008 John Darrington <[email protected]>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved.
#
# Note: Modified by Ted Ts'o to add @ifNotGNUMake@
AC_DEFUN(
[CHECK_GNU_MAKE], [ AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
_cv_gnu_make_command='' ;
dnl Search all the common names for GNU make
if test -n "$FORCE_NATIVE_MAKE" ; then
MAKES="make"
else
MAKES="make gmake gnumake"
fi
for a in "$MAKE" $MAKES ; do
if test -z "$a" ; then continue ; fi ;
if ( sh -c "$a --version" 2> /dev/null | grep GNU 2>&1 > /dev/null ) ; then
_cv_gnu_make_command=$a ;
break;
fi
done ;
) ;
dnl If there was a GNU version, then set @ifGNUmake@ to the empty string, '#' otherwise
if test "x$_cv_gnu_make_command" != "x" ; then
ifGNUmake='' ;
ifNotGNUmake='#' ;
else
ifGNUmake='#' ;
ifNotGNUmake='' ;
AC_MSG_RESULT("Not found");
fi
AC_SUBST(ifGNUmake)
AC_SUBST(ifNotGNUmake)
] )
# AX_CHECK_MOUNT_OPT: an autoconf macro to check for generic filesystem-
# agnostic 'mount' options. Written by Nicholas Clark. Looks for constants in
# sys/mount.h to predict whether the 'mount' utility will support a specific
# mounting option.
#
# This macro can be used to check for the presence of 'nodev' (or other mount
# options), which isn't uniformly implemented in the BSD family at the time of
# this writing. Tested on FreeBSD, NetBSD, OpenBSD, and Linux.
#
# Usage:
#
# AX_CHECK_MOUNT_OPT(option)
#
# Defines HAVE_MOUNT_$OPTION (in uppercase) if the option exists, and sets
# ac_cv_mount_$option (in original case) otherwise.
#
# Copyright (c) 2018 Nicholas Clark <[email protected]>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty or attribution requirement.
AC_DEFUN([AX_CHECK_MOUNT_OPT], [__AX_CHECK_MOUNT_OPT(m4_tolower([$1]),m4_toupper([$1]))])
AC_DEFUN([__AX_CHECK_MOUNT_OPT],
[
AS_IF([test "x$ac_cv_header_sys_mount_h" = x],
[AC_CHECK_HEADERS([sys/mount.h])])
AS_IF([test "x$ac_cv_header_sys_mount_h" = xno],
[AC_MSG_FAILURE([error: sys/mount.h not present on your system!])])
AS_ECHO_N("checking for mount '$1' option... ")
AC_TRY_COMPILE(
[#include <sys/mount.h>],
[void *temp = (void *)(MS_$2); (void) temp;],
[AC_DEFINE(HAVE_MOUNT_$2, 1, [Define to 1 if mount supports $1.])
AS_VAR_SET(ac_cv_mount_$1, yes)
AS_ECHO("yes")],
[AC_TRY_COMPILE(
[#include <sys/mount.h>],
[void *temp = (void *)(MNT_$2); (void) temp;],
[AC_DEFINE(HAVE_MOUNT_$2, 1, [Define to 1 if mount supports $1.])
AS_VAR_SET(ac_cv_mount_$1, yes)
AS_ECHO("yes")],
[AS_VAR_SET(ac_cv_mount_$1, no)
AS_ECHO("no")]
)]
)
])