diff options
Diffstat (limited to 'm4/d-ino.m4')
| -rw-r--r-- | m4/d-ino.m4 | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/m4/d-ino.m4 b/m4/d-ino.m4 new file mode 100644 index 0000000..daefce9 --- /dev/null +++ b/m4/d-ino.m4 @@ -0,0 +1,60 @@ +# serial 20 + +dnl From Jim Meyering. +dnl +dnl Check whether struct dirent has a member named d_ino. +dnl + +# Copyright (C) 1997, 1999-2001, 2003-2004, 2006-2007, 2009-2022 Free Software +# Foundation, Inc. + +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO], + [AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([for d_ino member in directory struct], + [gl_cv_struct_dirent_d_ino], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <sys/types.h> + #include <sys/stat.h> + #include <dirent.h> + ]], + [[DIR *dp = opendir ("."); + struct dirent *e; + struct stat st; + if (! dp) + return 1; + e = readdir (dp); + if (! e) + { closedir (dp); return 2; } + if (lstat (e->d_name, &st) != 0) + { closedir (dp); return 3; } + if (e->d_ino != st.st_ino) + { closedir (dp); return 4; } + closedir (dp); + return 0; + ]])], + [gl_cv_struct_dirent_d_ino=yes], + [gl_cv_struct_dirent_d_ino=no], + [case "$host_os" in + # Guess yes on glibc systems with Linux kernel. + linux*-gnu*) gl_cv_struct_dirent_d_ino="guessing yes" ;; + # Guess yes on musl systems with Linux kernel. + linux*-musl*) gl_cv_struct_dirent_d_ino="guessing yes" ;; + # Guess no on native Windows. + mingw*) gl_cv_struct_dirent_d_ino="guessing no" ;; + # If we don't know, obey --enable-cross-guesses. + *) gl_cv_struct_dirent_d_ino="$gl_cross_guess_normal" ;; + esac + ])]) + case "$gl_cv_struct_dirent_d_ino" in + *yes) + AC_DEFINE([D_INO_IN_DIRENT], [1], + [Define if struct dirent has a member d_ino that actually works.]) + ;; + esac + ] +) |