https://git.ruby-lang.org/ruby.git/commit/?id=733aa2f8b5

From 733aa2f8b578d03bbcb91d2f496b01e3b990c7e8 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Fri, 6 Sep 2019 18:43:10 +0900
Subject: Stop setting same flags as cflags to cxxflags


diff --git a/configure.ac b/configure.ac
index 2a71a91..90b5a40 100644
--- a/configure.ac
+++ b/configure.ac
@@ -162,11 +162,11 @@ AS_IF([test -z "${CFLAGS+set}"], [ https://github.com/ruby/ruby/blob/trunk/configure.ac#L162
     orig_cflags="$cflags"
     cflags="$cflags "'${optflags} ${debugflags} ${warnflags}'
 ])
-AS_IF([test -z "${CXXFLAGS+set}"], [
-    cxxflags=`echo " $cxxflags " | sed "$cflagspat;s/^ *//;s/ *$//"`
-    orig_cxxflags="$cxxflags"
-    cxxflags="$cxxflags "'${optflags} ${debugflags} ${warnflags}'
-])
+dnl AS_IF([test -z "${CXXFLAGS+set}"], [
+dnl     cxxflags=`echo " $cxxflags " | sed "$cflagspat;s/^ *//;s/ *$//"`
+dnl     orig_cxxflags="$cxxflags"
+dnl     cxxflags="$cxxflags "'${optflags} ${debugflags} ${warnflags}'
+dnl ])
 
 AS_CASE(["$host_os:$build_os"],
 [darwin*:darwin*], [
@@ -3594,7 +3594,7 @@ rb_cv_warnflags=`echo "$rb_cv_warnflags" | sed 's/^ *//;s/ *$//'` https://github.com/ruby/ruby/blob/trunk/configure.ac#L3594
 warnflags="$rb_cv_warnflags"
 AC_SUBST(cppflags)dnl
 AC_SUBST(cflags, ["${orig_cflags:+$orig_cflags }"'${optflags} ${debugflags} ${warnflags}'])dnl
-AC_SUBST(cxxflags, ["${orig_cxxflags:+$orig_cxxflags }"'${optflags} ${debugflags} ${warnflags}'])dnl
+AC_SUBST(cxxflags)dnl
 AC_SUBST(optflags)dnl
 AC_SUBST(debugflags)dnl
 AC_SUBST(warnflags)dnl
-- 
cgit v0.10.2


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