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Compilation

Compilation#

Warning

You will need upward of 130 Go of space to compile UE4 with debug symbols

 48   M     ./Build
228   M     ./Documentation
 22   G     ./Source                <= Because Source/ThirdParty include 21G of binaries
  4.1 G     ./Extras
692   K     ./Config
 38   M     ./Programs
 21   G     ./Binaries              <= Compiled Binaries will vary
  7.1 M     ./Shaders
  1.7 G     ./Content
483   M     ./DerivedDataCache
 31   G     ./Plugins               <= Include the compiled binaries of each plugin
 41   G     ./Intermediate          <= Intermediate/Build for incremental builds
  5.4 M     ./Saved
120   G     .

Windows#

  • Install build tool

    • windows SDK (which one?)

    • .NET dev+runtime

    • C++ x64 Native

Note

From 2022 build tools the compiler and the build tools can be installed without visual studio.

Git#

# Windows file permissions are wrong when using WSL
git config --global core.filemode false

# Do not use windows newline
git config --global core.autocrlf true

Linux#

Compile libaries with UE4 clang#

EngineDir="$SCRIPT_DIR/../../../"
InstallClangDir="$EngineDir/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/v19_clang-11.0.1-centos7/x86_64-unknown-linux-gnu/"
PATH="${InstallClangDir}/bin:$PATH"
LibCxx="$EngineDir/Source/ThirdParty/Linux/LibCxx/lib/Linux/x86_64-unknown-linux-gnu/libc++.a"
LibCxxAbi="$EngineDir/Source/ThirdParty/Linux/LibCxx/lib/Linux/x86_64-unknown-linux-gnu/libc++abi.a"
LibCxxInclude="$EngineDir/Source/ThirdParty/Linux/LibCxx/include/c++/v1"

cmake $ModuleDir/Source/ $Options \
   -DCMAKE_SYSROOT=${InstallClangDir}\
   -DCMAKE_BUILD_TYPE=Release \
   -DCMAKE_C_COMPILER=${InstallClangDir}/bin/clang \
   -DCMAKE_CXX_COMPILER=${InstallClangDir}/bin/clang++ \
   -DCMAKE_AR=${InstallClangDir}/bin/llvm-ar \
   -DCMAKE_NM=${InstallClangDir}/bin/llvm-nm \
   -DCMAKE_RANLIB=${InstallClangDir}/bin/x86_64-unknown-linux-gnu-ranlib \
   -DCMAKE_EXE_LINKER_FLAGS="-nostdinc++ -nostdlib++ -L$LibCxx --sysroot=${InstallClangDir} -fuse-ld=lld" \
   -DCMAKE_C_FLAGS="--sysroot=${InstallClangDir}" \
   -DCMAKE_CXX_FLAGS="-nostdlib++ --sysroot=${InstallClangDir} -isystem $LibCxxInclude"
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