$ scons
scons: Reading SConscript files ...
Building for python2.7
python2.7 generate.py
Writing mypaint-brush-settings-gen.h
Writing brushsettings-gen.h
application SConscript
swig -o mypaintlib_wrap.cpp -noproxydel -python -c++ mypaintlib.i
set umask to 0022 (was 0002)
scons: done reading SConscript files.
scons: Building targets ...
Creating 'brushlib/mypaint-config.h'
g++ -o lib/mypaintlib_wrap.os -c -Wall -Wno-sign-compare -Wno-write-strings -pthread -fno-strict-aliasing -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security -Xlinker -export-dynamic -fPIC -DNDEBUG -Ilib -I/usr/include/json -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/libpng12 -I/usr/local/include/cairo -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0 -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/pygtk-2.0 -I/usr/lib/python2.7/dist-packages/numpy/core/include -I/usr/include/python2.7 -Ibrushlib lib/mypaintlib_wrap.cpp
cc1plus: warning: command line option '-Wstrict-prototypes' is valid for Ada/C/ObjC but not for C++ [enabled by default]
In file included from lib/mypaintlib.hpp:19:0,
                 from lib/mypaintlib_wrap.cpp:3070:
lib/fastpng.hpp: In function 'PyObject* save_png_fast_progressive(char*, int, int, bool, PyObject*, bool)':
lib/fastpng.hpp:131:16: warning: unused variable 'obj' [-Wunused-variable]
gcc -o brushlib/brushmodes.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/brushmodes.c
gcc -o brushlib/helpers.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/helpers.c
gcc -o brushlib/mapping.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/mapping.c
gcc -o brushlib/mypaint-brush-settings.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/mypaint-brush-settings.c
gcc -o brushlib/mypaint-brush.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/mypaint-brush.c
gcc -o brushlib/mypaint-fixed-tiled-surface.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/mypaint-fixed-tiled-surface.c
brushlib/mypaint-fixed-tiled-surface.c: In function 'area_changed':
brushlib/mypaint-fixed-tiled-surface.c:98:31: warning: unused variable 'self' [-Wunused-variable]
gcc -o brushlib/mypaint-surface.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/mypaint-surface.c
gcc -o brushlib/mypaint-tiled-surface.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/mypaint-tiled-surface.c
gcc -o brushlib/mypaint.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/mypaint.c
gcc -o brushlib/rng-double.os -c -std=c99 -D_POSIX_C_SOURCE=200809L -Wall -g -fPIC -Ibrushlib -I/usr/include/json brushlib/rng-double.c
gcc -o libmypaint-brushlib.so -z origin -shared -Wl,-rpath=\$ORIGIN brushlib/brushmodes.os brushlib/helpers.os brushlib/mapping.os brushlib/mypaint-brush-settings.os brushlib/mypaint-brush.os brushlib/mypaint-fixed-tiled-surface.os brushlib/mypaint-surface.os brushlib/mypaint-tiled-surface.os brushlib/mypaint.os brushlib/rng-double.os -lm -ljson
Install file: "libmypaint-brushlib.so" as "/usr/local/lib/libmypaint-brushlib.so"
scons: *** [/usr/local/lib/libmypaint-brushlib.so] /usr/local/lib/libmypaint-brushlib.so: Permission denied
scons: building terminated because of errors.