https://git.ruby-lang.org/ruby.git/commit/?id=c594370c6e

From c594370c6e78de1aa001c16ec0327b4575ccd559 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 19 Jun 2022 10:26:21 +0900
Subject: [ruby/etc] [DOC] Update

System-dependent feature macros are automatically detected by
extconf.rb, and are not used by users.

https://github.com/ruby/etc/commit/e7343b4e69
---
 ext/etc/etc.c | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/ext/etc/etc.c b/ext/etc/etc.c
index 9a691d6e34..965c7cbaa2 100644
--- a/ext/etc/etc.c
+++ b/ext/etc/etc.c
@@ -1096,9 +1096,9 @@ Init_etc(void) https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.c#L1096
 {
     VALUE mEtc;
 
-    #ifdef HAVE_RB_EXT_RACTOR_SAFE
-	RB_EXT_RACTOR_SAFE(true);
-    #endif
+#ifdef HAVE_RB_EXT_RACTOR_SAFE
+    RB_EXT_RACTOR_SAFE(true);
+#endif
     mEtc = rb_define_module("Etc");
     rb_define_const(mEtc, "VERSION", rb_str_new_cstr(RUBY_ETC_VERSION));
     init_constants(mEtc);
@@ -1159,7 +1159,9 @@ Init_etc(void) https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.c#L1159
 				      NULL);
 #if 0
     /*
-     * Passwd is a Struct that contains the following members:
+     * Passwd is a placeholder Struct for user database on Unix systems.
+     *
+     * === The struct contains the following members
      *
      * name::
      *	    contains the short login name of the user as a String.
@@ -1176,25 +1178,24 @@ Init_etc(void) https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.c#L1178
      * shell::
      *	    contains the path to the login shell of the user as a String.
      *
-     * === The following members below are optional, and must be compiled with special flags:
+     * === The following members below are system-dependent
      *
      * gecos::
      *     contains a longer String description of the user, such as
      *	   a full name. Some Unix systems provide structured information in the
      *     gecos field, but this is system-dependent.
-     *     must be compiled with +HAVE_STRUCT_PASSWD_PW_GECOS+
      * change::
-     *     password change time(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_CHANGE+
+     *     password change time(integer).
      * quota::
-     *     quota value(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_QUOTA+
+     *     quota value(integer).
      * age::
-     *     password age(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_AGE+
+     *     password age(integer).
      * class::
-     *     user access class(string) must be compiled with +HAVE_STRUCT_PASSWD_PW_CLASS+
+     *     user access class(string).
      * comment::
-     *     comment(string) must be compiled with +HAVE_STRUCT_PASSWD_PW_COMMENT+
+     *     comment(string).
      * expire::
-     *	    account expiration time(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_EXPIRE+
+     *	    account expiration time(integer).
      */
     sPasswd = rb_define_class_under(mEtc, "Passwd", rb_cStruct);
 #endif
@@ -1210,9 +1211,9 @@ Init_etc(void) https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.c#L1211
 
 #if 0
     /*
-     * Group is a Struct that is only available when compiled with +HAVE_GETGRENT+.
+     * Group is a placeholder Struct for user group database on Unix systems.
      *
-     * The struct contains the following members:
+     * === The struct contains the following members
      *
      * name::
      *	    contains the name of the group as a String.
@@ -1221,7 +1222,7 @@ Init_etc(void) https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.c#L1222
      *	    returned if password access to the group is not available; an empty
      *	    string is returned if no password is needed to obtain membership of
      *	    the group.
-     *	    Must be compiled with +HAVE_STRUCT_GROUP_GR_PASSWD+.
+     *	    This is system-dependent.
      * gid::
      *	    contains the group's numeric ID as an integer.
      * mem::
-- 
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