Index: head/devel/libzim/files/patch-meson.build
===================================================================
--- head/devel/libzim/files/patch-meson.build	(revision 477239)
+++ head/devel/libzim/files/patch-meson.build	(revision 477240)
@@ -1,17 +1,26 @@
---- meson.build.orig	2018-07-11 01:42:53.056789000 +0000
-+++ meson.build	2018-07-11 01:42:55.616640000 +0000
+--- meson.build.orig	2018-06-14 22:03:52 UTC
++++ meson.build
+@@ -1,7 +1,7 @@
+ project('libzim', ['c', 'cpp'],
+   version : '4.0.0',
+   license : 'GPL2',
+-  default_options : ['c_std=c11', 'cpp_std=c++11', 'werror=true'])
++  default_options : ['c_std=c11', 'cpp_std=c++11'])
+ 
+ conf = configuration_data()
+ conf.set('VERSION', '"@0@"'.format(meson.project_version()))
 @@ -9,6 +9,9 @@ conf.set('DIRENT_CACHE_SIZE', get_option('DIRENT_CACHE
  conf.set('CLUSTER_CACHE_SIZE', get_option('CLUSTER_CACHE_SIZE'))
  conf.set('LZMA_MEMORY_SIZE', get_option('LZMA_MEMORY_SIZE'))
  
 +cc = meson.get_compiler('c')
 +execinfo_dep = cc.find_library('execinfo', required : false)
 +
  zlib_dep = dependency('zlib', required:false)
  conf.set('ENABLE_ZLIB', zlib_dep.found())
  
 @@ -49,3 +52,4 @@ pkg_mod.generate(libraries : libzim,
                   filebase : 'libzim',
                   description : 'A Library to zim.',
                   requires : pkg_requires)
 +