--- vapoursynth-git-1b93fd964.old/src/core/simplefilters.cpp
+++ vapoursynth-git-1b93fd964/src/core/simplefilters.cpp
@@ -37,6 +37,7 @@
 #include "VapourSynth3.h" // only used for old colorfamily constant conversion in ShufflePlanes
 
 using namespace vsh;
+using namespace std;
 
 static inline uint32_t doubleToUInt32S(double v) {
     if (v < 0)
--- vapoursynth-git-1b93fd964.old/meson.build
+++ vapoursynth-git-1b93fd964/meson.build
@@ -1,5 +1,5 @@
 project('VapourSynth', ['c', 'cpp', 'cython'],
-    default_options: ['buildtype=release', 'b_lto=true', 'b_ndebug=if-release', 'c_std=c99', 'cpp_std=c++17'],
+    default_options: ['buildtype=release', 'b_lto=false', 'b_ndebug=if-release', 'c_std=c99', 'cpp_std=c++17'],
     license: 'LGPL-2.1-or-later',
     meson_version: '>=0.63.0',
     version: run_command('cat', 'VAPOURSYNTH_VERSION', check: true).stdout().strip().split()[2].split('-')[0],