| # 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 \ $_cv_gnu_make_command \$@ >> Makefile; |
| # fi |
| # |
| # Then, if any (well almost any) other make is called, and GNU make also |
| # exists, then the other make wraps the GNU make. |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2008 John Darrington <j.darrington@elvis.murdoch.edu.au> |
| # |
| # Copying and distribution of this file, with or without modification, are |
| # permitted in any medium without royalty provided the copyright notice |
| # and this notice are preserved. |
| # |
| # Note: Modified by Ted Ts'o to add @ifNotGNUMake@ |
| |
| AC_DEFUN( |
| [CHECK_GNU_MAKE], [ AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command, |
| _cv_gnu_make_command='' ; |
| dnl Search all the common names for GNU make |
| if test -n "$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 <nicholas.clark@gmail.com> |
| # |
| # 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")] |
| )] |
| ) |
| ]) |
