lib/replace/repdir.m4

   1 AC_CACHE_CHECK([for broken readdir],libreplace_cv_READDIR_NEEDED,[
   2         AC_TRY_RUN([
   3 #define test_readdir_os2_delete main
   4 #include "$libreplacedir/test/os2_delete.c"],
   5         [libreplace_cv_READDIR_NEEDED=no],
   6         [libreplace_cv_READDIR_NEEDED=yes],
   7         [libreplace_cv_READDIR_NEEDED="assuming not"])
   8 ])
   9
  10 #
  11 # try to replace with getdirentries() if needed
  12 #
  13 if test x"$libreplace_cv_READDIR_NEEDED" = x"yes"; then
  14 AC_CHECK_FUNCS(getdirentries)
  15 AC_VERIFY_C_PROTOTYPE([long telldir(const DIR *dir)],
  16         [
  17         return 0;
  18         ],[
  19         AC_DEFINE(TELLDIR_TAKES_CONST_DIR, 1, [Whether telldir takes a const pointer])
  20         ],[],[
  21         #include <dirent.h>
  22         ])
  23
  24 AC_VERIFY_C_PROTOTYPE([int seekdir(DIR *dir, long ofs)],
  25         [
  26         return 0;
  27         ],[
  28         AC_DEFINE(SEEKDIR_RETURNS_INT, 1, [Whether seekdir returns an int])
  29         ],[],[
  30         #include <dirent.h>
  31         ])
  32 AC_CACHE_CHECK([for replacing readdir using getdirentries()],libreplace_cv_READDIR_GETDIRENTRIES,[
  33         AC_TRY_RUN([
  34 #define _LIBREPLACE_REPLACE_H
  35 #include "$libreplacedir/repdir_getdirentries.c"
  36 #define test_readdir_os2_delete main
  37 #include "$libreplacedir/test/os2_delete.c"],
  38         [libreplace_cv_READDIR_GETDIRENTRIES=yes],
  39         [libreplace_cv_READDIR_GETDIRENTRIES=no])
  40 ])
  41 fi
  42 if test x"$libreplace_cv_READDIR_GETDIRENTRIES" = x"yes"; then
  43         AC_DEFINE(REPLACE_READDIR,1,[replace readdir])
  44         AC_DEFINE(REPLACE_READDIR_GETDIRENTRIES,1,[replace readdir using getdirentries()])
  45         LIBREPLACEOBJ="${LIBREPLACEOBJ} repdir_getdirentries.o"
  46         libreplace_cv_READDIR_NEEDED=no
  47 fi
  48
  49 #
  50 # try to replace with getdents() if needed
  51 #
  52 if test x"$libreplace_cv_READDIR_NEEDED" = x"yes"; then
  53 AC_CHECK_FUNCS(getdents)
  54 AC_CACHE_CHECK([for replacing readdir using getdents()],libreplace_cv_READDIR_GETDENTS,[
  55         AC_TRY_RUN([
  56 #define _LIBREPLACE_REPLACE_H
  57 #error _donot_use_getdents_replacement_anymore
  58 #include "$libreplacedir/repdir_getdents.c"
  59 #define test_readdir_os2_delete main
  60 #include "$libreplacedir/test/os2_delete.c"],
  61         [libreplace_cv_READDIR_GETDENTS=yes],
  62         [libreplace_cv_READDIR_GETDENTS=no])
  63 ])
  64 fi
  65 if test x"$libreplace_cv_READDIR_GETDENTS" = x"yes"; then
  66         AC_DEFINE(REPLACE_READDIR,1,[replace readdir])
  67         AC_DEFINE(REPLACE_READDIR_GETDENTS,1,[replace readdir using getdents()])
  68         LIBREPLACEOBJ="${LIBREPLACEOBJ} repdir_getdents.o"
  69         libreplace_cv_READDIR_NEEDED=no
  70 fi
  71
  72 AC_MSG_CHECKING([a usable readdir()])
  73 if test x"$libreplace_cv_READDIR_NEEDED" = x"yes"; then
  74         AC_MSG_RESULT(no)
  75         AC_MSG_WARN([the provided readdir() is broken])
  76 else
  77         AC_MSG_RESULT(yes)
  78 fi