Build errors when trying to compile against sdl2-compat

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[31/61] /usr/bin/c++ -DHAVE_MALLOC_H -DHAVE_POSIX_MEMALIGN -DLIBDE265_EXPORTS -Dde265_EXPORTS -I/buildstream-build -I/buildstream-build/_builddir -I/buildstream-build/libde265 -I/buildstream-build/_builddir/libde265 -O2 -pipe -g -Wp,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -DNDEBUG -std=c++11 -fPIC   -Wall -MD -MT libde265/CMakeFiles/de265.dir/configparam.cc.o -MF libde265/CMakeFiles/de265.dir/configparam.cc.o.d -o libde265/CMakeFiles/de265.dir/configparam.cc.o -c /buildstream-build/libde265/configparam.cc
[32/61] /usr/bin/c++ -DHAVE_MALLOC_H -DHAVE_POSIX_MEMALIGN -DHAVE_SDL -I/buildstream-build -I/buildstream-build/_builddir -I/buildstream-build/libde265 -isystem /usr/include/SDL2 -O2 -pipe -g -Wp,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -DNDEBUG -std=c++11 -fPIE   -Wall -MD -MT dec265/CMakeFiles/dec265.dir/sdl.cc.o -MF dec265/CMakeFiles/dec265.dir/sdl.cc.o.d -o dec265/CMakeFiles/dec265.dir/sdl.cc.o -c /buildstream-build/dec265/sdl.cc
FAILED: dec265/CMakeFiles/dec265.dir/sdl.cc.o 
/usr/bin/c++ -DHAVE_MALLOC_H -DHAVE_POSIX_MEMALIGN -DHAVE_SDL -I/buildstream-build -I/buildstream-build/_builddir -I/buildstream-build/libde265 -isystem /usr/include/SDL2 -O2 -pipe -g -Wp,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -DNDEBUG -std=c++11 -fPIE   -Wall -MD -MT dec265/CMakeFiles/dec265.dir/sdl.cc.o -MF dec265/CMakeFiles/dec265.dir/sdl.cc.o.d -o dec265/CMakeFiles/dec265.dir/sdl.cc.o -c /buildstream-build/dec265/sdl.cc
/buildstream-build/dec265/sdl.cc: In member function ‘void SDL_YUV_Display::display420(const unsigned char*, const unsigned char*, const unsigned char*, int, int)’:
/buildstream-build/dec265/sdl.cc:136:5: error: ‘memcpy’ was not declared in this scope
  136 |     memcpy(mPixels, Y, rect.w * rect.h);
      |     ^~~~~~
/buildstream-build/dec265/sdl.cc:29:1: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
   28 | #include <assert.h>
  +++ |+#include <cstring>
   29 | 
/buildstream-build/dec265/sdl.cc:146:9: error: ‘memcpy’ was not declared in this scope
  146 |         memcpy(dest, Y+stride*y, rect.w);
      |         ^~~~~~
/buildstream-build/dec265/sdl.cc:146:9: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc:151:9: error: ‘memcpy’ was not declared in this scope
  151 |         memcpy(dest, V+chroma_stride*y, rect.w/2);
      |         ^~~~~~
/buildstream-build/dec265/sdl.cc:151:9: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc:156:9: error: ‘memcpy’ was not declared in this scope
  156 |         memcpy(dest, U+chroma_stride*y, rect.w/2);
      |         ^~~~~~
/buildstream-build/dec265/sdl.cc:156:9: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc: In member function ‘void SDL_YUV_Display::display400(const unsigned char*, int)’:
/buildstream-build/dec265/sdl.cc:169:5: error: ‘memcpy’ was not declared in this scope
  169 |     memcpy(mPixels, Y, rect.w * rect.h);
      |     ^~~~~~
/buildstream-build/dec265/sdl.cc:169:5: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc:177:9: error: ‘memcpy’ was not declared in this scope
  177 |         memcpy(dest, Y+stride*y, rect.w);
      |         ^~~~~~
/buildstream-build/dec265/sdl.cc:177:9: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc:183:3: error: ‘memset’ was not declared in this scope
  183 |   memset(dest, 0x80, mStride * rect.h / 2);
      |   ^~~~~~
/buildstream-build/dec265/sdl.cc:183:3: note: ‘memset’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc: In member function ‘void SDL_YUV_Display::display422(const unsigned char*, const unsigned char*, const unsigned char*, int, int)’:
/buildstream-build/dec265/sdl.cc:196:5: error: ‘memcpy’ was not declared in this scope
  196 |     memcpy(dstY, Yp, rect.w);
      |     ^~~~~~
/buildstream-build/dec265/sdl.cc:196:5: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc:206:5: error: ‘memcpy’ was not declared in this scope
  206 |     memcpy(dstU, Up, rect.w / 2);
      |     ^~~~~~
/buildstream-build/dec265/sdl.cc:206:5: note: ‘memcpy’ is defined in header ‘<cstring>’; this is probably fixable by adding ‘#include <cstring>’
/buildstream-build/dec265/sdl.cc: In member function ‘void SDL_YUV_Display::display444as420(const unsigned char*, const unsigned char*, const unsigned char*, int, int)’:
/buildstream-build/dec265/sdl.cc:246:7: error: ‘memcpy’ was not declared in this scope
  246 |       memcpy(p, Y+y*stride, rect.w);
      |       ^~~~~~