Fatal build error

[JL2210]

Not sure if this is just me, but the header file <bits/c++config.h> is missing. Help?

./clang++.sh -o test_egl_skinning -std=c++11 -pipe -fno-exceptions -fno-rtti -fstrict-aliasing -Wreturn-type -Wunused-variable -Wunused-value -DPLATFORM_GLES -DPLATFORM_GL_OES_vertex_array_object -I./khronos -march=native -mtune=native -ffast-math -funroll-loops -O3 -DNDEBUG main_chromeos.cpp app_skinning.cpp rendSkeleton.cpp util_tex.cpp util_file.cpp util_misc.cpp gles_ext.cpp -fuse-ld=lld -lwayland-client -lrt -ldl -lEGL -lGLESv2 -lpng16
In file included from main_chromeos.cpp:7:
In file included from /usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/stdlib.h:36:
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/cstdlib:41:10: fatal error: 'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
In file included from app_skinning.cpp:15:
In file included from /usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/stdlib.h:36:
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/cstdlib:41:10: fatal error: 'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
In file included from rendSkeleton.cpp:3:
In file included from ./cmath_fix:13:
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/cmath:41:10: fatal error: 'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
In file included from util_tex.cpp:2:
In file included from /usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/stdlib.h:36:
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/cstdlib:41:10: fatal error: 'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.
In file included from util_file.cpp:5:
In file included from /usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/stdlib.h:36:
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/cstdlib:41:10: fatal error: 'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.

In file included from util_misc.cpp:8:
In file included from /usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/stdlib.h:36:
/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/cstdlib:41:10: fatal error: 'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^~~~~~~~~~~~~~~~~~
1 error generated.

[blu]

Ok, I'm on gcc-7.3.0, but other than the version and machine component of paths, everything else should be the same. On my machine the c++config header is found under:

$ find /usr/local/ -name "c++config.h"
/usr/local/include/c++/7.3.0/armv7l-cros-linux-gnueabihf/bits/c++config.h

In your case, step-by-step normalisation of the include paths yields:

/usr/local/bin/../lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/stdlib.h
/usr/local/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../include/c++/8.2.0/stdlib.h
/usr/local/include/c++/8.2.0/stdlib.h

That should be normally the g++-provided component of stdlib.h. The latter, on its turn, should try to load the cstdlib from

/usr/local/include/c++/8.2.0/cstdlib

To this step both our setups are in agreement. Let me think what might be happening next -- I'll get back to you later.

[blu]

@JL2210: Let's do the following test. Make a minimal c++ TU that includes stdlib.h, like this:

$ echo "#include <stdlib.h>" > test.cpp

Now, build that via your g++-8.2.0 with high verbosity, and take note of the include paths. Here's what it looks like for my g++-7.3.0:

$ g++ test.cpp -v -c
...
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/lib/gcc/armv7l-cros-linux-gnueabihf/7.3.0/../../../../include/c++/7.3.0
 /usr/local/lib/gcc/armv7l-cros-linux-gnueabihf/7.3.0/../../../../include/c++/7.3.0/armv7l-cros-linux-gnueabihf
 /usr/local/lib/gcc/armv7l-cros-linux-gnueabihf/7.3.0/../../../../include/c++/7.3.0/backward
 /usr/local/lib/gcc/armv7l-cros-linux-gnueabihf/7.3.0/include
 /usr/local/include
 /usr/local/lib/gcc/armv7l-cros-linux-gnueabihf/7.3.0/include-fixed
 /usr/include
End of search list.
...

Repeat the same but with the clang++.sh wrapper:

$ ./clang++.sh test.cpp -v -c
...
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include/c++/7.3.0/armv7l-cros-linux-gnueabihf
 /usr/local/include/c++/7.3.0
 /usr/local/include
 /usr/local/lib/clang/6.0.0/include
 /usr/include
End of search list.

How does that look like in your case?

[JL2210]

Sorry. GCC broke just a minute ago. I am recompiling now. I'll get back to you when I'm done.

[JL2210]

It works now; but this error shows up:

unspecified framebuffer bitness; bailing out

[JL2210]

Here's the full log:

chronos@localhost ~/Downloads/misc/hello-chromeos-gles2 $ ./build_chromeos_skinning.sh && ./build_chromeos_sphere.sh && ./build_chromeos_sphere_multi.sh 
./clang++.sh -o test_egl_skinning -std=c++11 -pipe -fno-exceptions -fno-rtti -fstrict-aliasing -Wreturn-type -Wunused-variable -Wunused-value -DPLATFORM_GLES -DPLATFORM_GL_OES_vertex_array_object -I./khronos -march=native -mtune=native -ffast-math -funroll-loops -O3 -DNDEBUG main_chromeos.cpp app_skinning.cpp rendSkeleton.cpp util_tex.cpp util_file.cpp util_misc.cpp gles_ext.cpp -fuse-ld=lld -lwayland-client -lrt -ldl -lEGL -lGLESv2 -lpng16
main_chromeos.cpp:1406:14: warning: unused variable 'grab_filename' [-Wunused-variable]
        const char* grab_filename      = param.grab_filename;
                    ^
main_chromeos.cpp:1405:17: warning: unused variable 'grab_frame' [-Wunused-variable]
        const unsigned grab_frame      = param.grab_frame;
                       ^
2 warnings generated.
./clang++.sh -o test_egl_sphere -std=c++11 -pipe -fno-exceptions -fno-rtti -fstrict-aliasing -Wreturn-type -Wunused-variable -Wunused-value -DPLATFORM_GLES -DPLATFORM_GL_OES_vertex_array_object -I./khronos -march=native -mtune=native -ffast-math -funroll-loops -O3 -DNDEBUG main_chromeos.cpp app_sphere.cpp util_tex.cpp util_file.cpp util_misc.cpp gles_ext.cpp -fuse-ld=lld -lwayland-client -lrt -ldl -lEGL -lGLESv2 -lpng16
main_chromeos.cpp:1406:14: warning: unused variable 'grab_filename' [-Wunused-variable]
        const char* grab_filename      = param.grab_filename;
                    ^
main_chromeos.cpp:1405:17: warning: unused variable 'grab_frame' [-Wunused-variable]
        const unsigned grab_frame      = param.grab_frame;
                       ^
2 warnings generated.
./clang++.sh -o test_egl_sphere_multi -std=c++11 -pipe -fno-exceptions -fno-rtti -fstrict-aliasing -Wreturn-type -Wunused-variable -Wunused-value -DPLATFORM_GLES -DPLATFORM_GL_OES_vertex_array_object -I./khronos -march=native -mtune=native -ffast-math -funroll-loops -O3 -DNDEBUG main_chromeos.cpp app_sphere_multi.cpp util_tex.cpp util_file.cpp util_misc.cpp gles_ext.cpp -fuse-ld=lld -lwayland-client -lrt -ldl -lEGL -lGLESv2 -lpng16
main_chromeos.cpp:1406:14: warning: unused variable 'grab_filename' [-Wunused-variable]
        const char* grab_filename      = param.grab_filename;
                    ^
main_chromeos.cpp:1405:17: warning: unused variable 'grab_frame' [-Wunused-variable]
        const unsigned grab_frame      = param.grab_frame;
                       ^
2 warnings generated.
chronos@localhost ~/Downloads/misc/hello-chromeos-gles2 $ ./test_egl_skinning ; ./test_egl_sphere ; ./test_egl_sphere_multi 
unspecified framebuffer bitness; bailing out
unspecified framebuffer bitness; bailing out
unspecified framebuffer bitness; bailing out
chronos@localhost ~/Downloads/misc/hello-chromeos-gles2 $ 

[JL2210]

This is with sommelierd running.

[blu]

You need to specify a pixel format via the -bitness CLI -- it's mandatory for now, and it effectively needs to be "8 8 8 8" -- i.e. RGBA8888, as otherwise you'd get a serious performance hit (due to a shortcut in the presentation pipeline; I'm working on a proper EGL->wayland transfer ATM). RE sommelierd -- I don't think it matters as the code uses wayland and EGL throughout.

[JL2210]

So, I run, for example, ./test_egl_skinning -bitness 8 8 8 8?

[JL2210]

Wow!

[blu]

@JL2210: it's just a unittest of a skeletal system. Once I'm done with the frameloop (not the current hack) there will be a tad more complex things to show ; )