1 # from http://autoconf-archive.cryp.to/ax_tls.html 2 # 3 # This was licensed under the GPL with the following exception: 4 # 5 # As a special exception, the respective Autoconf Macro's copyright 6 # owner gives unlimited permission to copy, distribute and modify the 7 # configure scripts that are the output of Autoconf when processing 8 # the Macro. You need not follow the terms of the GNU General Public 9 # License when using or distributing such scripts, even though 10 # portions of the text of the Macro appear in them. The GNU General 11 # Public License (GPL) does govern all other use of the material that 12 # constitutes the Autoconf Macro. 13 # 14 # This special exception to the GPL applies to versions of the 15 # Autoconf Macro released by the Autoconf Macro Archive. When you make 16 # and distribute a modified version of the Autoconf Macro, you may 17 # extend this special exception to the GPL to apply to your modified 18 # version as well. 19 # 20 AC_DEFUN([AX_TLS], [ 21 AC_MSG_CHECKING(for thread local storage (TLS) class) 22 AC_CACHE_VAL(ac_cv_tls, [ 23 ax_tls_keywords="__thread __declspec(thread) none" 24 for ax_tls_keyword in $ax_tls_keywords; do 25 case $ax_tls_keyword in 26 none) ac_cv_tls=none ; break ;; 27 *) 28 AC_TRY_COMPILE( 29 [#include <stdlib.h> 30 static void 31 foo(void) { 32 static ] $ax_tls_keyword [ int bar; 33 exit(1); 34 }], 35 [], 36 [ac_cv_tls=$ax_tls_keyword ; break], 37 ac_cv_tls=none 38 ) 39 esac 40 done 41 ]) 42 43 if test "$ac_cv_tls" != "none"; then 44 dnl AC_DEFINE([TLS], [], [If the compiler supports a TLS storage class define it to that here]) 45 AC_DEFINE_UNQUOTED([TLS], $ac_cv_tls, [If the compiler supports a TLS storage class define it to that here]) 46 fi 47 AC_MSG_RESULT($ac_cv_tls) 48 ]) 49 50 # =========================================================================== 51 # http://www.nongnu.org/autoconf-archive/check_gnu_make.html 52 # =========================================================================== 53 # 54 # SYNOPSIS 55 # 56 # CHECK_GNU_MAKE() 57 # 58 # DESCRIPTION 59 # 60 # This macro searches for a GNU version of make. If a match is found, the 61 # makefile variable `ifGNUmake' is set to the empty string, otherwise it 62 # is set to "#". This is useful for including a special features in a 63 # Makefile, which cannot be handled by other versions of make. The 64 # variable _cv_gnu_make_command is set to the command to invoke GNU make 65 # if it exists, the empty string otherwise. 66 # 67 # Here is an example of its use: 68 # 69 # Makefile.in might contain: 70 # 71 # # A failsafe way of putting a dependency rule into a makefile 72 # $(DEPEND): 73 # $(CC) -MM $(srcdir)/*.c > $(DEPEND) 74 # 75 # @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND))) 76 # @ifGNUmake@ include $(DEPEND) 77 # @ifGNUmake@ endif 78 # 79 # Then configure.in would normally contain: 80 # 81 # CHECK_GNU_MAKE() 82 # AC_OUTPUT(Makefile) 83 # 84 # Then perhaps to cause gnu make to override any other make, we could do 85 # something like this (note that GNU make always looks for GNUmakefile 86 # first): 87 # 88 # if ! test x$_cv_gnu_make_command = x ; then 89 # mv Makefile GNUmakefile 90 # echo .DEFAULT: > Makefile ; 91 # echo \ $_cv_gnu_make_command \$@ >> Makefile; 92 # fi 93 # 94 # Then, if any (well almost any) other make is called, and GNU make also 95 # exists, then the other make wraps the GNU make. 96 # 97 # LICENSE 98 # 99 # Copyright (c) 2008 John Darrington <j.darrington (a] elvis.murdoch.edu.au> 100 # 101 # Copying and distribution of this file, with or without modification, are 102 # permitted in any medium without royalty provided the copyright notice 103 # and this notice are preserved. 104 # 105 # Note: Modified by Ted Ts'o to add @ifNotGNUMake@ 106 107 AC_DEFUN( 108 [CHECK_GNU_MAKE], [ AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command, 109 _cv_gnu_make_command='' ; 110 dnl Search all the common names for GNU make 111 if test -z "$FORCE_NATIVE_MAKE" ; then 112 MAKES="make" 113 else 114 MAKES="make gmake gnumake" 115 fi 116 for a in "$MAKE" $MAKES ; do 117 if test -z "$a" ; then continue ; fi ; 118 if ( sh -c "$a --version" 2> /dev/null | grep GNU 2>&1 > /dev/null ) ; then 119 _cv_gnu_make_command=$a ; 120 break; 121 fi 122 done ; 123 ) ; 124 dnl If there was a GNU version, then set @ifGNUmake@ to the empty string, '#' otherwise 125 if test "x$_cv_gnu_make_command" != "x" ; then 126 ifGNUmake='' ; 127 ifNotGNUmake='#' ; 128 else 129 ifGNUmake='#' ; 130 ifNotGNUmake='' ; 131 AC_MSG_RESULT("Not found"); 132 fi 133 AC_SUBST(ifGNUmake) 134 AC_SUBST(ifNotGNUmake) 135 ] ) 136 # was originally from nls.m4 serial 1 (gettext-0.12) 137 AC_DEFUN([AM_MKINSTALLDIRS], 138 [ 139 dnl If the AC_CONFIG_AUX_DIR macro for autoconf is used we possibly 140 dnl find the mkinstalldirs script in another subdir but $(top_srcdir). 141 dnl Try to locate it. 142 MKINSTALLDIRS= 143 if test -n "$ac_aux_dir"; then 144 case "$ac_aux_dir" in 145 /*) MKINSTALLDIRS="$ac_aux_dir/mkinstalldirs" ;; 146 *) MKINSTALLDIRS="\$(top_builddir)/$ac_aux_dir/mkinstalldirs" ;; 147 esac 148 fi 149 if test -z "$MKINSTALLDIRS"; then 150 MKINSTALLDIRS="\$(top_srcdir)/mkinstalldirs" 151 fi 152 AC_SUBST(MKINSTALLDIRS) 153 ]) 154
