https://git.ruby-lang.org/ruby.git/commit/?id=4fae3c3fb0

From 4fae3c3fb0847ba8eccb61b3c0cc0ae874c17cf0 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sat, 25 May 2019 16:56:26 +0900
Subject: Show doc list to install

Show document format list to install, not only enabled or disable.

diff --git a/configure.ac b/configure.ac
index d068efd..d7b575b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3992,6 +3992,9 @@ AS_REQUIRE_SHELL_FN([config_summary], https://github.com/ruby/ruby/blob/trunk/configure.ac#L3992
     ])]
 )
 
+AS_IF([test $install_doc = yes],
+    [DOCTARGETS=`echo " $RDOCTARGET $CAPITARGET " | sed 's/ nodoc //g;s/^ *//;s/ *$//'`],
+    [DOCTARGETS=no])
 echo "---"
 echo "Configuration summary for $RUBY_BASE_NAME version $MAJOR.$MINOR.$TEENY"
 echo ""
@@ -4017,7 +4020,7 @@ config_summary "optflags"            "$optflags" https://github.com/ruby/ruby/blob/trunk/configure.ac#L4020
 config_summary "debugflags"          "$debugflags"
 config_summary "warnflags"           "$warnflags"
 config_summary "strip command"       "$STRIP"
-config_summary "install doc"         "$install_doc"
+config_summary "install doc"         "$DOCTARGETS"
 config_summary "JIT support"         "$MJIT_SUPPORT"
 config_summary "man page type"       "$MANTYPE"
 config_summary "search path"         "$search_path"
-- 
cgit v0.10.2


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