https://git.ruby-lang.org/ruby.git/commit/?id=90dd482061

From 90dd482061ab014a6137c2df2239cc6106974dbb Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 27 Dec 2020 16:32:08 +0900
Subject: win32: Declared wait and fixed the return type


diff --git a/include/ruby/win32.h b/include/ruby/win32.h
index 0025948..4978655 100644
--- a/include/ruby/win32.h
+++ b/include/ruby/win32.h
@@ -304,7 +304,8 @@ extern int rb_w32_usymlink(const char *src, const char *link); https://github.com/ruby/ruby/blob/trunk/include/ruby/win32.h#L304
 extern int gettimeofday(struct timeval *, struct timezone *);
 extern int clock_gettime(clockid_t, struct timespec *);
 extern int clock_getres(clockid_t, struct timespec *);
-extern rb_pid_t waitpid (rb_pid_t, int *, int);
+extern rb_pid_t waitpid(rb_pid_t, int *, int);
+extern rb_pid_t wait(int *);
 extern rb_pid_t rb_w32_uspawn(int, const char *, const char*);
 extern rb_pid_t rb_w32_uaspawn(int, const char *, char *const *);
 extern rb_pid_t rb_w32_uaspawn_flags(int, const char *, char *const *, DWORD);
diff --git a/win32/win32.c b/win32/win32.c
index 5985875..d04985e 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -5211,7 +5211,7 @@ symlink(const char *src, const char *link) https://github.com/ruby/ruby/blob/trunk/win32/win32.c#L5211
 }
 
 /* License: Ruby's */
-int
+rb_pid_t
 wait(int *status)
 {
     return waitpid(-1, status, 0);
-- 
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