1 files changed, 82 insertions, 0 deletions
diff --git a/gl/m4/glob.m4 b/gl/m4/glob.m4
new file mode 100644
index 00000000..93567af0
--- /dev/null
+++ b/gl/m4/glob.m4
@@ -0,0 +1,82 @@
+# glob.m4 serial 21
+dnl Copyright (C) 2005-2007, 2009-2019 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# The glob module assumes you want GNU glob, with glob_pattern_p etc,
+# rather than vanilla POSIX glob.  This means your code should
+# always include <glob.h> for the glob prototypes.
+
+AC_DEFUN([gl_GLOB],
+[
+  AC_REQUIRE([gl_GLOB_H])
+
+  AC_CHECK_FUNCS_ONCE([glob glob_pattern_p])
+  if test $ac_cv_func_glob = no; then
+    HAVE_GLOB=0
+  else
+
+    AC_CACHE_CHECK([for GNU glob interface version 1 or 2],
+      [gl_cv_gnu_glob_interface_version_1_2],
+[     AC_COMPILE_IFELSE([AC_LANG_SOURCE(
+[[#include <gnu-versions.h>
+char a[_GNU_GLOB_INTERFACE_VERSION == 1 || _GNU_GLOB_INTERFACE_VERSION == 2 ? 1 : -1];]])],
+        [gl_cv_gnu_glob_interface_version_1_2=yes],
+        [gl_cv_gnu_glob_interface_version_1_2=no])])
+    if test "$gl_cv_gnu_glob_interface_version_1_2" = "no"; then
+      REPLACE_GLOB=1
+    fi
+
+    if test $REPLACE_GLOB = 0; then
+      AC_CACHE_CHECK([whether glob lists broken symlinks],
+                     [gl_cv_glob_lists_symlinks],
+        [if ln -s conf-doesntexist conf$$-globtest 2>/dev/null; then
+           gl_cv_glob_lists_symlinks=maybe
+         else
+           # If we can't make a symlink, then we cannot test this issue.  Be
+           # pessimistic about this.
+           gl_cv_glob_lists_symlinks=no
+         fi
+         if test $gl_cv_glob_lists_symlinks = maybe; then
+           AC_RUN_IFELSE(
+             [AC_LANG_PROGRAM(
+                [[#include <stddef.h>
+                  #include <glob.h>]],
+                [[glob_t found;
+                  if (glob ("conf*-globtest", 0, NULL, &found) == GLOB_NOMATCH)
+                    return 1;
+                ]])],
+             [gl_cv_glob_lists_symlinks=yes],
+             [gl_cv_glob_lists_symlinks=no],
+             [gl_cv_glob_lists_symlinks=no])
+         fi
+         rm -f conf$$-globtest
+        ])
+      if test $gl_cv_glob_lists_symlinks = no; then
+        REPLACE_GLOB=1
+      fi
+    fi
+
+  fi
+
+  if test $ac_cv_func_glob_pattern_p = no; then
+    HAVE_GLOB_PATTERN_P=0
+  else
+    if test $REPLACE_GLOB = 1; then
+      REPLACE_GLOB_PATTERN_P=1
+    fi
+  fi
+
+  if test $HAVE_GLOB = 0 || test $REPLACE_GLOB = 1; then
+    gl_REPLACE_GLOB_H
+  fi
+])
+
+# Prerequisites of lib/glob.c and lib/globfree.c.
+AC_DEFUN([gl_PREREQ_GLOB],
+[
+  AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_TYPE])
+  AC_CHECK_HEADERS_ONCE([unistd.h])
+  AC_CHECK_FUNCS_ONCE([getlogin_r getpwnam_r])
+])