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v1.47.2
acinclude.m4
178 строк
6 KB
Theodore Ts'o
configure: don't fail if /usr/include/sys/mount.h does not exist
13 ноя 2019, 21:55
13 ноя 2019, 21:55
b9bb6a5
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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 \ $_cv_gnu_make_command \$@ >> Makefile; # fi # # Then, if any (well almost any) other make is called, and GNU make also # exists, then the other make wraps the GNU make. # # LICENSE # # Copyright (c) 2008 John Darrington <j.darrington@elvis.murdoch.edu.au> # # Copying and distribution of this file, with or without modification, are # permitted in any medium without royalty provided the copyright notice # and this notice are preserved. # # Note: Modified by Ted Ts'o to add @ifNotGNUMake@ AC_DEFUN( [CHECK_GNU_MAKE], [ AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command, _cv_gnu_make_command='' ; dnl Search all the common names for GNU make if test -n "$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_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")] )] ) ])