https://git.ruby-lang.org/ruby.git/commit/?id=f379748e80

From f379748e80dacc208dbe23a2db508aead8b79978 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 30 Nov 2021 11:12:21 +0900
Subject: Cache wheather madvise declaration is needed on Solaris

---
 configure.ac | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 7ec11478f5c..a3e97d54dbc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1108,15 +1108,18 @@ main() https://github.com/ruby/ruby/blob/trunk/configure.ac#L1108
 		  ])
 		])
 		AC_CHECK_TYPES([caddr_t],[],[],[@%:@include <sys/types.h>])
-		RUBY_WERROR_FLAG([AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+		AC_CACHE_CHECK([whether madvise declaration is needed], rb_cv_madvice_prototype_using_caddr_t,
+		  [RUBY_WERROR_FLAG([AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 		    @%:@if defined(HAVE_CADDR_T) && (defined(MADV_FREE) || defined(MADV_DONTNEED))
 		    @%:@include <sys/unistd.h>
 		    @%:@include <sys/mman.h>
 		    @%:@include <sys/types.h>
 		    extern int madvise(caddr_t, size_t, int);
 		    ]], [[]])],
-		    [AC_DEFINE(NEED_MADVICE_PROTOTYPE_USING_CADDR_T, 1)], [])
+		    [rb_cv_madvice_prototype_using_caddr_t=yes], [rb_cv_madvice_prototype_using_caddr_t=no])
+		  ])
 		])
+		AS_IF([test $rb_cv_madvice_prototype_using_caddr_t = yes], [AC_DEFINE(NEED_MADVICE_PROTOTYPE_USING_CADDR_T, 1)])
 		],
 [haiku*], [
 		LIBS="$LIBS" # m lib is include in root
-- 
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