From 4ec27506cb530c15dbfff30690612aa0b6404d8c Mon Sep 17 00:00:00 2001
From: Marko Lindqvist <cazfi74@gmail.com>
Date: Thu, 21 Jul 2022 01:42:25 +0300
Subject: [PATCH 47/47] Meson: Make readline support optional

See osdn #45135

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
---
 doc/INSTALL.meson |  4 ++++
 meson.build       | 17 ++++++++++++-----
 meson_options.txt |  5 +++++
 3 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/doc/INSTALL.meson b/doc/INSTALL.meson
index 99af3deb3c..21ef3bbd12 100644
--- a/doc/INSTALL.meson
+++ b/doc/INSTALL.meson
@@ -133,6 +133,10 @@ mwand ('try'/'true'/'false')
   Whether to build against MagickWand to have support for additional
   mapimg formats. The default is 'try' to enable the support if possible.
 
+readline ('try'/'true'/'false')
+  Whether to enable readline functionality on server.
+  The default is 'try' to enable it if suitable readline found.
+
 audio (boolean):
   Build sound support to the clients. Defaults to true.
 
diff --git a/meson.build b/meson.build
index 14fb531026..9735c1f35a 100644
--- a/meson.build
+++ b/meson.build
@@ -366,11 +366,18 @@ else
   charset_dep = []
 endif
 
-readline_dep = c_compiler.find_library('readline', dirs: cross_lib_path,
-                                       required:false)
-
-if readline_dep.found()
-  pub_conf_data.set('FREECIV_HAVE_LIBREADLINE', 1)
+rl_req = get_option('readline')
+if rl_req != 'false'
+  readline_dep = c_compiler.find_library('readline', dirs: cross_lib_path,
+                                         required:false)
+
+  if readline_dep.found()
+    pub_conf_data.set('FREECIV_HAVE_LIBREADLINE', 1)
+  elif rl_req == 'true'
+    error('Readline support requested but not found.')
+  endif
+else
+  readline_dep = []
 endif
 
 lzma_dep = c_compiler.find_library('lzma', dirs: cross_lib_path,
diff --git a/meson_options.txt b/meson_options.txt
index 7c5c925e24..cd3813d0d9 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -35,6 +35,11 @@ option('mwand',
        choices: ['try', 'true', 'false'],
        description: 'Build MagickWand support to mapimg')
 
+option('readline',
+       type: 'combo',
+       choices: ['try', 'true', 'false'],
+       description: 'Enable readline functionality')
+
 option('audio',
        type: 'boolean',
        value: true,
-- 
2.35.1