diff options
Diffstat (limited to 'infrastructure/m4/ax_check_dirent_d_type.m4')
| -rw-r--r-- | infrastructure/m4/ax_check_dirent_d_type.m4 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/infrastructure/m4/ax_check_dirent_d_type.m4 b/infrastructure/m4/ax_check_dirent_d_type.m4 new file mode 100644 index 00000000..87b93185 --- /dev/null +++ b/infrastructure/m4/ax_check_dirent_d_type.m4 @@ -0,0 +1,41 @@ +dnl @synopsis AX_CHECK_DIRENT_D_TYPE([ACTION-IF-TRUE], [ACTION-IF-FALSE]) +dnl +dnl This macro will find out if struct dirent.d_type is present and supported. +dnl +dnl The following defines will be set as appropriate: +dnl HAVE_STRUCT_DIRENT_D_TYPE +dnl HAVE_VALID_DIRENT_D_TYPE +dnl Also ACTION-IF-TRUE and ACTION-IF-FALSE are run as appropriate +dnl +dnl @category C +dnl @author Martin Ebourne +dnl @version 2005/07/03 +dnl @license AllPermissive + +AC_DEFUN([AX_CHECK_DIRENT_D_TYPE], [ + AC_CHECK_MEMBERS([struct dirent.d_type],,, [[#include <dirent.h>]]) + if test "x$ac_cv_member_struct_dirent_d_type" = "xyes"; then + AC_CACHE_CHECK([[whether struct dirent.d_type is valid]], [have_valid_dirent_d_type], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM([[ + $ac_includes_default + #include <dirent.h> + ]], [[ + DIR* dir = opendir("."); + struct dirent* res = NULL; + if(dir) res = readdir(dir); + return res ? (res->d_type==DT_UNKNOWN) : 1; + ]])], + [have_valid_dirent_d_type=yes], [have_valid_dirent_d_type=no] + )]) + if test "x$have_valid_dirent_d_type" = "xyes"; then + AC_DEFINE([HAVE_VALID_DIRENT_D_TYPE], 1, [Define to 1 if struct dirent.d_type is valid]) + fi + fi + if test "x$ac_cv_member_struct_dirent_d_type" = "xyes" || \ + test "x$have_valid_dirent_d_type" = "xyes" + then + m4_ifvaln([$1],[$1],[:])dnl + m4_ifvaln([$2],[else $2])dnl + fi + ])dnl |