From: Sebastian Ramacher <sramacher@debian.org>
Date: Tue, 17 Apr 2018 21:11:53 +0200
Subject: Do not abort if libtool, meson or ninja-build are missing

They are not used anywhere.
---
 make/configure.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/make/configure.py b/make/configure.py
index 86dd6c1..d59e8ab 100644
--- a/make/configure.py
+++ b/make/configure.py
@@ -1604,13 +1604,13 @@ try:
 
         autoconf   = ToolProbe( 'AUTOCONF.exe',   'autoconf',   'autoconf', abort=True, minversion=[2,69,0] )
         automake   = ToolProbe( 'AUTOMAKE.exe',   'automake',   'automake', abort=True, minversion=[1,15,0] )
-        libtool    = ToolProbe( 'LIBTOOL.exe',    'libtool',    'libtool', abort=True )
+        libtool    = ToolProbe( 'LIBTOOL.exe',    'libtool',    'libtool', abort=False )
         lipo       = ToolProbe( 'LIPO.exe',       'lipo',       'lipo', abort=False )
         pkgconfig  = ToolProbe( 'PKGCONFIG.exe',  'pkgconfig',  'pkg-config', abort=True, minversion=[0,29,0] )
 
-        meson      = ToolProbe( 'MESON.exe',      'meson',      'meson', abort=True, minversion=[0,47,0] )
+        meson      = ToolProbe( 'MESON.exe',      'meson',      'meson', abort=False, minversion=[0,47,0] )
         nasm       = ToolProbe( 'NASM.exe',       'asm',        'nasm', abort=True, minversion=[2,13,0] )
-        ninja      = ToolProbe( 'NINJA.exe',      'ninja',      'ninja-build', 'ninja', abort=True )
+        ninja      = ToolProbe( 'NINJA.exe',      'ninja',      'ninja-build', 'ninja', abort=False )
 
         xcodebuild = ToolProbe( 'XCODEBUILD.exe', 'xcodebuild', 'xcodebuild', abort=(True if (build_tuple.match('*-*-darwin*') and cross is None) else False), versionopt='-version', minversion=[10,3,0] )
 
