1dnl ###################################################################### 2dnl check if a filesystem exists (if any of its header files exist). 3dnl Usage: AC_CHECK_FS_HEADERS(<headers>..., <fs>, [<fssymbol>]) 4dnl Check if any of the headers <headers> exist. If any exist, then 5dnl define HAVE_FS_<fs>. If <fssymbol> exits, then define 6dnl HAVE_FS_<fssymbol> instead... 7AC_DEFUN([AMU_CHECK_FS_HEADERS], 8[ 9# find what name to give to the fs 10if test -n "$3" 11then 12 ac_fs_name=$3 13else 14 ac_fs_name=$2 15fi 16# store variable name of fs 17ac_upcase_fs_name=`echo $2 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'` 18ac_fs_headers_safe=HAVE_FS_$ac_upcase_fs_name 19# check for cache and set it if needed 20AMU_CACHE_CHECK_DYNAMIC(for $ac_fs_name filesystem in <$1>, 21ac_cv_fs_header_$ac_fs_name, 22[ 23# define to "no" by default 24eval "ac_cv_fs_header_$ac_fs_name=no" 25# and look to see if it was found 26AC_CHECK_HEADERS($1, 27[ eval "ac_cv_fs_header_$ac_fs_name=yes" 28 break 29])]) 30# check if need to define variable 31if test "`eval echo '$''{ac_cv_fs_header_'$ac_fs_name'}'`" = yes 32then 33 AC_DEFINE_UNQUOTED($ac_fs_headers_safe) 34# append ops_<fs>.o object to AMD_FS_OBJS for automatic compilation 35# if first time we add something to this list, then also tell autoconf 36# to replace instances of it in Makefiles. 37 if test -z "$AMD_FS_OBJS" 38 then 39 AMD_FS_OBJS="ops_${ac_fs_name}.o" 40 AC_SUBST(AMD_FS_OBJS) 41 else 42 # since this object file could have already been added before 43 # we need to ensure we do not add it twice. 44 case "${AMD_FS_OBJS}" in 45 *ops_${ac_fs_name}.o* ) ;; 46 * ) 47 AMD_FS_OBJS="$AMD_FS_OBJS ops_${ac_fs_name}.o" 48 ;; 49 esac 50 fi 51fi 52]) 53dnl ====================================================================== 54