I tried following the "Compiling for Linux" section of https://powdertoy.co.uk/Wiki/W/Building_TPT_with_Meson.html in order to get The Powder Toy running on my Raspberry Pi 400 using the old Debian Buster version of Raspberry Pi OS. I saw another post with the same error here, but the suggested fix uses Homebrew which isn't compatible with a Raspberry Pi. The command "meson compile" failed with this text:

pi@raspberrypi:~/Downloads/PowderToy/The-Powder-Toy/build-debug $ meson compile

INFO: autodetecting backend as ninja

INFO: calculating backend command to run: /usr/local/bin/ninja

[22/398] Compiling C++ object powder.p/src_lua_CommandInterface.cpp.o

In file included from ../src/lua/CommandInterface.cpp:8:

../src/gui/game/GameModel.h:155:24: warning: ignoring attributes on template argument ‘ui::Colour’ {aka ‘RGBA<unsigned char, void>’} [-Wignored-attributes]

  std::vector<ui::Colour> GetColourPresets();

                        ^

[25/398] Compiling C++ object powder.p/src_lua_TPTScriptInterface.cpp.o

In file included from ../src/lua/TPTScriptInterface.cpp:7:

../src/gui/game/GameModel.h:155:24: warning: ignoring attributes on template argument ‘ui::Colour’ {aka ‘RGBA<unsigned char, void>’} [-Wignored-attributes]

  std::vector<ui::Colour> GetColourPresets();

                        ^

[61/398] Compiling C++ object powder.p/src_client_http_requestmanager_Libcurl.cpp.o

FAILED: powder.p/src_client_http_requestmanager_Libcurl.cpp.o 

ccache c++ -Ipowder.p -I. -I.. -Isrc -I../src -Iresources -I../resources -I/usr/include -I/usr/include/libpng16 -I/usr/include/SDL2 -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vmcs_host/linux -I/usr/include/luajit-2.1 -I/usr/include/arm-linux-gnueabihf -I/usr/include/jsoncpp -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=c++17 -fno-rtti -O0 -g -D_REENTRANT -pthread -Wno-invalid-offsetof -Wno-unused-result -Wno-missing-field-initializers -Wno-unused-parameter -MD -MQ powder.p/src_client_http_requestmanager_Libcurl.cpp.o -MF powder.p/src_client_http_requestmanager_Libcurl.cpp.o.d -o powder.p/src_client_http_requestmanager_Libcurl.cpp.o -c ../src/client/http/requestmanager/Libcurl.cpp

../src/client/http/requestmanager/Libcurl.cpp: In member function ‘void http::RequestManagerImpl::WorkerPerform()’:

../src/client/http/requestmanager/Libcurl.cpp:179:19: error: ‘curl_multi_poll’ was not declared in this scope

   HandleCURLMcode(curl_multi_poll(manager->curlMulti, NULL, 0, 1000, &dontcare));

                   ^~~~~~~~~~~~~~~

../src/client/http/requestmanager/Libcurl.cpp:179:19: note: suggested alternative: ‘curl_multi_wait’

   HandleCURLMcode(curl_multi_poll(manager->curlMulti, NULL, 0, 1000, &dontcare));

                   ^~~~~~~~~~~~~~~

                   curl_multi_wait

../src/client/http/requestmanager/Libcurl.cpp: In member function ‘void http::RequestManager::RegisterRequestImpl(http::Request&)’:

../src/client/http/requestmanager/Libcurl.cpp:316:3: error: ‘curl_multi_wakeup’ was not declared in this scope

   curl_multi_wakeup(manager->curlMulti);

   ^~~~~~~~~~~~~~~~~

../src/client/http/requestmanager/Libcurl.cpp:316:3: note: suggested alternative: ‘curl_multi_wait’

   curl_multi_wakeup(manager->curlMulti);

   ^~~~~~~~~~~~~~~~~

   curl_multi_wait

../src/client/http/requestmanager/Libcurl.cpp: In member function ‘void http::RequestManager::UnregisterRequestImpl(http::Request&)’:

../src/client/http/requestmanager/Libcurl.cpp:326:3: error: ‘curl_multi_wakeup’ was not declared in this scope

   curl_multi_wakeup(manager->curlMulti);

   ^~~~~~~~~~~~~~~~~

../src/client/http/requestmanager/Libcurl.cpp:326:3: note: suggested alternative: ‘curl_multi_wait’

   curl_multi_wakeup(manager->curlMulti);

   ^~~~~~~~~~~~~~~~~

   curl_multi_wait

[66/398] Compiling C++ object powder.p/src_debug_ElementPopulation.cpp.o

ninja: build stopped: subcommand failed.

Is there any hope of getting this to work?

pi@raspberrypi:~/Downloads/PowderToy/The-Powder-Toy/build-debug $ meson compileINFO: autodetecting backend as ninjaINFO: calculating backend command to run: /usr/local/bin/ninja[22/398] Compiling C++ object powder.p/src_lua_CommandInterface.cpp.oIn file included from ../src/lua/CommandInterface.cpp:8:../src/gui/game/GameModel.h:155:24: warning: ignoring attributes on template argument ‘ui::Colour’ {aka ‘RGBA<unsigned char, void>’} [-Wignored-attributes]  std::vector<ui::Colour> GetColourPresets();                        ^[25/398] Compiling C++ object powder.p/src_lua_TPTScriptInterface.cpp.oIn file included from ../src/lua/TPTScriptInterface.cpp:7:../src/gui/game/GameModel.h:155:24: warning: ignoring attributes on template argument ‘ui::Colour’ {aka ‘RGBA<unsigned char, void>’} [-Wignored-attributes]  std::vector<ui::Colour> GetColourPresets();                        ^[61/398] Compiling C++ object powder.p/src_client_http_requestmanager_Libcurl.cpp.oFAILED: powder.p/src_client_http_requestmanager_Libcurl.cpp.o ccache c++ -Ipowder.p -I. -I.. -Isrc -I../src -Iresources -I../resources -I/usr/include -I/usr/include/libpng16 -I/usr/include/SDL2 -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vmcs_host/linux -I/usr/include/luajit-2.1 -I/usr/include/arm-linux-gnueabihf -I/usr/include/jsoncpp -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=c++17 -fno-rtti -O0 -g -D_REENTRANT -pthread -Wno-invalid-offsetof -Wno-unused-result -Wno-missing-field-initializers -Wno-unused-parameter -MD -MQ powder.p/src_client_http_requestmanager_Libcurl.cpp.o -MF powder.p/src_client_http_requestmanager_Libcurl.cpp.o.d -o powder.p/src_client_http_requestmanager_Libcurl.cpp.o -c ../src/client/http/requestmanager/Libcurl.cpp../src/client/http/requestmanager/Libcurl.cpp: In member function ‘void http::RequestManagerImpl::WorkerPerform()’:../src/client/http/requestmanager/Libcurl.cpp:179:19: error: ‘curl_multi_poll’ was not declared in this scope   HandleCURLMcode(curl_multi_poll(manager->curlMulti, NULL, 0, 1000, &dontcare));                   ^~~~~~~~~~~~~~~../src/client/http/requestmanager/Libcurl.cpp:179:19: note: suggested alternative: ‘curl_multi_wait’   HandleCURLMcode(curl_multi_poll(manager->curlMulti, NULL, 0, 1000, &dontcare));                   ^~~~~~~~~~~~~~~                   curl_multi_wait../src/client/http/requestmanager/Libcurl.cpp: In member function ‘void http::RequestManager::RegisterRequestImpl(http::Request&)’:../src/client/http/requestmanager/Libcurl.cpp:316:3: error: ‘curl_multi_wakeup’ was not declared in this scope   curl_multi_wakeup(manager->curlMulti);   ^~~~~~~~~~~~~~~~~../src/client/http/requestmanager/Libcurl.cpp:316:3: note: suggested alternative: ‘curl_multi_wait’   curl_multi_wakeup(manager->curlMulti);   ^~~~~~~~~~~~~~~~~   curl_multi_wait../src/client/http/requestmanager/Libcurl.cpp: In member function ‘void http::RequestManager::UnregisterRequestImpl(http::Request&)’:../src/client/http/requestmanager/Libcurl.cpp:326:3: error: ‘curl_multi_wakeup’ was not declared in this scope   curl_multi_wakeup(manager->curlMulti);   ^~~~~~~~~~~~~~~~~../src/client/http/requestmanager/Libcurl.cpp:326:3: note: suggested alternative: ‘curl_multi_wait’   curl_multi_wakeup(manager->curlMulti);   ^~~~~~~~~~~~~~~~~   curl_multi_wait[66/398] Compiling C++ object powder.p/src_debug_ElementPopulation.cpp.oninja: build stopped: subcommand failed.

@LBPHacker (View Post)

 This worked and removed the error! Thank you so much!

I've never been able to compile someone else's program on my computer before, so it was such a relief to see the compile process reach step 398 / 398. However, the linking stage still failed. Seemingly with libcurl again, but for something related to a networking file this time? Can this be fixed too?

pi@raspberrypi:~/Downloads $ git clone https://github.com/The-Powder-Toy/The-Powder-Toy.git
Cloning into 'The-Powder-Toy'...
remote: Enumerating objects: 49673, done.
remote: Counting objects: 100% (4055/4055), done.
remote: Compressing objects: 100% (1172/1172), done.
remote: Total 49673 (delta 3126), reused 3543 (delta 2880), pack-reused 45618
Receiving objects: 100% (49673/49673), 33.64 MiB | 2.33 MiB/s, done.
Resolving deltas: 100% (38195/38195), done.

pi@raspberrypi:~/Downloads $ cd The-Powder-Toy/
pi@raspberrypi:~/Downloads/The-Powder-Toy $ meson setup build-debug
The Meson build system
Version: 1.2.3
Source dir: /home/pi/Downloads/The-Powder-Toy
Build dir: /home/pi/Downloads/The-Powder-Toy/build-debug
Build type: native build
Project name: the-powder-toy
Project version: the.cake.is.a.lie
C compiler for the host machine: ccache cc (gcc 8.3.0 "cc (Raspbian 8.3.0-6+rpi1) 8.3.0")
C linker for the host machine: cc ld.bfd 2.31.1
C++ compiler for the host machine: ccache c++ (gcc 8.3.0 "c++ (Raspbian 8.3.0-6+rpi1) 8.3.0")
C++ linker for the host machine: c++ ld.bfd 2.31.1
Host machine cpu family: arm
Host machine cpu: armv7l
Program inkscape skipped: feature render_icons_with_inkscape disabled
Has header "bzlib.h" : YES
Library bz2 found: YES
Found pkg-config: /usr/bin/pkg-config (0.29)
Run-time dependency luajit found: YES 2.1.0-beta3
Run-time dependency libcurl found: YES 7.64.0
Run-time dependency fftw3f found: YES 3.3.8
Run-time dependency threads found: YES
Run-time dependency zlib found: YES 1.2.11
Run-time dependency libpng16 found: YES 1.6.36
Run-time dependency sdl2 found: YES 2.0.9
Dependency bzip2 found: YES the.cake.is.a.lie (overridden)
Run-time dependency jsoncpp found: YES 1.7.4
Configuring VcsTag.h using configuration
Configuring ElementNumbers.h using configuration
Configuring ToolNumbers.h using configuration
Configuring Config.h using configuration
Configuring powder.desktop using configuration
Configuring appdata.xml using configuration
Build targets in project: 2

Found ninja-1.11.1.git.kitware.jobserver-1 at /usr/local/bin/ninja
pi@raspberrypi:~/Downloads/The-Powder-Toy $ cd build-debug/
pi@raspberrypi:~/Downloads/The-Powder-Toy/build-debug $ meson compile
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /usr/local/bin/ninja

[I cut the warnings so the message is small enough to post]

[398/398] Linking target powder
FAILED: powder
c++ -o powder powder.p/meson-generated_eventcompat.lua.cpp.o powder.p/meson-generated_icon_exe.png.cpp.o powder.p/meson-generated_icon_cps.png.cpp.o powder.p/meson-generated_save.xml.cpp.o powder.p/meson-generated_powder.desktop.cpp.o 

[Also trimmed]

powder.p/src_Probability.cpp.o powder.p/src_bson_BSON.cpp.o powder.p/src_bzip2_bz2wrap.cpp.o powder.p/src_common_String.cpp.o powder.p/src_common_tpt-rand.cpp.o powder.p/src_common_tpt-thread-local.cpp.o powder.p/src_common_platform_Common.cpp.o powder.p/src_common_platform_Linux.cpp.o powder.p/src_common_platform_Posix.cpp.o powder.p/src_common_platform_PosixProc.cpp.o powder.p/src_common_platform_ExitCommon.cpp.o -Wl,--as-needed -Wl,--no-undefined -pthread -Wl,--start-group /usr/lib/arm-linux-gnueabihf/libz.so /usr/lib/arm-linux-gnueabihf/libpng16.so /usr/lib/arm-linux-gnueabihf/libSDL2.so /usr/lib/arm-linux-gnueabihf/libluajit-5.1.so /usr/lib/arm-linux-gnueabihf/libcurl.so /usr/lib/arm-linux-gnueabihf/libfftw3f.so /usr/lib/gcc/arm-linux-gnueabihf/8/../../../arm-linux-gnueabihf/libbz2.so /usr/lib/arm-linux-gnueabihf/libjsoncpp.so -Wl,--end-group
/usr/bin/ld: powder.p/src_client_http_Request.cpp.o: in function `std::__atomic_base<long long>::operator long long() const':
/usr/include/c++/8/bits/atomic_base.h:396: undefined reference to `__atomic_load_8'
/usr/bin/ld: powder.p/src_client_http_requestmanager_Libcurl.cpp.o: in function `std::__atomic_base<long long>::operator=(long long)':
/usr/include/c++/8/bits/atomic_base.h:374: undefined reference to `__atomic_store_8'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

@jacob1 (View Post)

 Unfortunately, linking -latmoic with that command did not fix the issue :/

Error is the exact same as before.

IT WORKS!!!!

Thank you all so much! :D

The performance is slightly worse than my phone, I am using a Raspberry Pi after all, but I like using a mouse much more than a small touchscreen so I think it's great! I'm used to the slow speeds anyway (coughs with being stuck on Blender 2.79) so it doesn't really affect me.

Have an amazing day! Now, excuse me while I go explore an awesome new program I got recently. It has a unique looking electricity system which is just begging me to try making a custom CPU of some sort