https://git.ruby-lang.org/ruby.git/commit/?id=29e6782f5d

From 29e6782f5dbf127dc20156938af374eea9e2d74e Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 9 Oct 2019 23:39:58 +0900
Subject: Share ruby_sighandler_t definition


diff --git a/error.c b/error.c
index f8d2545..e29910a 100644
--- a/error.c
+++ b/error.c
@@ -599,7 +599,7 @@ rb_bug(const char *fmt, ...) https://github.com/ruby/ruby/blob/trunk/error.c#L599
 }
 
 void
-rb_bug_for_fatal_signal(RETSIGTYPE (*default_sighandler)(int), int sig, const void *ctx, const char *fmt, ...)
+rb_bug_for_fatal_signal(ruby_sighandler_t default_sighandler, int sig, const void *ctx, const char *fmt, ...)
 {
     const char *file = NULL;
     int line = 0;
diff --git a/signal.c b/signal.c
index 2876e87..8fb4306 100644
--- a/signal.c
+++ b/signal.c
@@ -507,13 +507,8 @@ static struct { https://github.com/ruby/ruby/blob/trunk/signal.c#L507
 volatile unsigned int ruby_nocldwait;
 #endif
 
-#ifdef __dietlibc__
-#define sighandler_t sh_t
-#else
 #define sighandler_t ruby_sighandler_t
-#endif
 
-typedef RETSIGTYPE (*sighandler_t)(int);
 #ifdef USE_SIGALTSTACK
 typedef void ruby_sigaction_t(int, siginfo_t*, void*);
 #define SIGINFO_ARG , siginfo_t *info, void *ctx
diff --git a/vm_core.h b/vm_core.h
index 30559b0..6850053 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1624,7 +1624,8 @@ extern void rb_vmdebug_debug_print_post(const rb_execution_context_t *ec, const https://github.com/ruby/ruby/blob/trunk/vm_core.h#L1624
 #define SDR() rb_vmdebug_stack_dump_raw(GET_EC(), GET_EC()->cfp)
 #define SDR2(cfp) rb_vmdebug_stack_dump_raw(GET_EC(), (cfp))
 void rb_vm_bugreport(const void *);
-NORETURN(void rb_bug_for_fatal_signal(RETSIGTYPE (*default_sighandler)(int), int sig, const void *, const char *fmt, ...));
+typedef RETSIGTYPE (*ruby_sighandler_t)(int);
+NORETURN(void rb_bug_for_fatal_signal(ruby_sighandler_t default_sighandler, int sig, const void *, const char *fmt, ...));
 
 /* functions about thread/vm execution */
 RUBY_SYMBOL_EXPORT_BEGIN
-- 
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