[Building OpenRCT2 on Rpi4 with Raspberry Pi OS]

The full output on the console reads....

-- IPO supported and enabled in Release.
CMake Warning at cmake/LibFindMacros.cmake:263 (message):
  WARNING: MISSING PACKAGE

  We could not find development headers for DISCORDRPC.  Do you have the
  necessary dev package installed? This package is NOT REQUIRED and you may
  ignore this warning but by doing so you may miss some functionality of
  openrct2.

  Relevant CMake configuration variables:

    DISCORDRPC_INCLUDE_DIR=<not found>
    DISCORDRPC_LIBRARY=<not found>

  You may use CMake GUI, cmake -D or ccmake to modify the values.  Delete
  CMakeCache.txt to discard all values and force full re-detection if
  necessary.

Call Stack (most recent call first):
  cmake/FindDiscordRPC.cmake:25 (libfind_process)
  CMakeLists.txt:203 (find_package)


-- Unsupported CXXFLAG: -Wmissing-variable-declarations
-- Unsupported CXXFLAG: -Wunreachable-code-break
-- Unsupported CXXFLAG: -Wrange-loop-analysis
-- Unsupported CXXFLAG: -Wtautological-unsigned-zero-compare
Found Google benchmark, enabling support
-- Found the following ICU libraries:
--   uc (required)
-- Checking for module 'flac'
--   No package 'flac' found
CMake Error at /usr/share/cmake-3.18/Modules/FindPkgConfig.cmake:545 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake-3.18/Modules/FindPkgConfig.cmake:733 (_pkg_check_modules_internal)
  src/openrct2-ui/CMakeLists.txt:27 (PKG_CHECK_MODULES)
  CMakeLists.txt:368 (include)


-- Configuring incomplete, errors occurred!
See also "/home/raspberrypi/OpenRCT2/OpenRCT2/build/CMakeFiles/CMakeOutput.log".
See also "/home/raspberrypi/OpenRCT2/OpenRCT2/build/CMakeFiles/CMakeError.log".

Any help would be appreciated

[Building OpenRCT2 on Rpi4 with Raspberry Pi OS]

I've had to rebuild my pi and I'm yet again struggling to get ORCT2 to install.....even though I've already successfully install it. 

When carrying out the following instructions......

cp g2.dat [Path to/OpenRCT2/OpenRCT2/data/. ]

..... I get get the following errors. 

-- Checking for module 'flac'
--   No package 'flac' found
CMake Error at /usr/share/cmake-3.18/Modules/FindPkgConfig.cmake:545 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake-3.18/Modules/FindPkgConfig.cmake:733 (_pkg_check_modules_internal)
  src/openrct2-ui/CMakeLists.txt:27 (PKG_CHECK_MODULES)
  CMakeLists.txt:368 (include)

I believe I've installed all dependencies, but who knows maybe I've missed something. 

 I'm going to reboot and try again....but any help would be appreciated. 

[Building OpenRCT2 on Rpi4 with Raspberry Pi OS]

Just attempted the GitHub instructions. 

All was going well until the last hurdle "make install"

My error reads...

Downloading /usr/local/share/openrct2/sequence/
CMake Error at /home/pi/snap/OpenRCT2/OpenRCT2/cmake/download.cmake:33 (file):
  file DOWNLOAD error: cannot create directory
  '/usr/local/share/openrct2/sequence' - Specify file by full path name and
  verify that you have directory creation and file write privileges.

Any advice?

[Building OpenRCT2 on Rpi4 with Raspberry Pi OS]

I tried to follow this guide....but no luck. 

It tripped up on the 

make

make g2

cp g2.dat [Path to/OpenRCT2/OpenRCT2/data/. ]

error was

fatal error: nlohmann/json_fwd.hpp: No such file or directory
   12 | #include <nlohmann/json_fwd.hpp>

Any suggestions for a fix? I'm now heading to github to see if I can get it working there.