Fix regression

CMakeLists.txt

@@ -11,6 +11,7 @@ if(NOT CCACHE)
 endif()
 message(STATUS "Found ccache ${CCACHE}")
 set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE} CACHE STRING "ccache executable")
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 # Extends cmake module path - so that FindwaLBerla.cmake in the current directory is found
 set ( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${your_project_name_SOURCE_DIR} )

apps/example_app_codegen/CMakeLists.txt

@@ -10,4 +10,4 @@ waLBerla_add_executable ( NAME ExampleAppCodegen
                           FILES ExampleApp.cpp
                           DEPENDS blockforest core field lbm geometry timeloop gui
                                   LatticeModelGenerated)
-
+target_compile_options(ExampleAppCodegen PRIVATE -mavx2)

apps/example_app_codegen/Readme.md

@@ -16,7 +16,7 @@ VERSION=0.4.4 DEPS="/work/jgrad/walberla_deps" PYTHONPATH="${DEPS}/${VERSION}/lb
 
 Then compile the AVX binary separately with:
 ```sh
-(cd /work/jgrad/walberla_deps/devel/example_app/build/apps/example_app_codegen && /usr/bin/ccache /usr/bin/clang++  -DBOOST_ALL_NO_LIB -I/work/jgrad/walberla_deps/devel/example_app/build/walberla/src -I/work/jgrad/walberla_deps/devel/walberla/src -I/work/jgrad/walberla_deps/devel/example_app/build/apps/example_app_codegen/default_codegen -isystem /work/jgrad/walberla_deps/devel/example_app/src -isystem /work/jgrad/walberla_deps/devel/example_app/build/src -isystem /work/jgrad/walberla_deps/0.4.4/pystencils/pystencils/include -isystem /usr/lib/x86_64-linux-gnu/openmpi/include/openmpi -isystem /usr/lib/x86_64-linux-gnu/openmpi/include  -Wall -Wconversion -Wshadow -Wno-c++11-extensions -Qunused-arguments -pthread -pthread -g   -std=gnu++17 -DWALBERLA_BUILD_WITH_AVX -o CMakeFiles/ExampleAppCodegen.dir/ExampleAppAVX.cpp.o -c /work/jgrad/walberla_deps/devel/example_app/apps/example_app_codegen/ExampleApp.cpp)
+(cd /work/jgrad/walberla_deps/devel/example_app/build/apps/example_app_codegen && /usr/bin/ccache /usr/bin/clang++  -DBOOST_ALL_NO_LIB -I/work/jgrad/walberla_deps/devel/example_app/build/walberla/src -I/work/jgrad/walberla_deps/devel/walberla/src -I/work/jgrad/walberla_deps/devel/example_app/build/apps/example_app_codegen/default_codegen -isystem /work/jgrad/walberla_deps/devel/example_app/src -isystem /work/jgrad/walberla_deps/devel/example_app/build/src -isystem /work/jgrad/walberla_deps/0.4.4/pystencils/pystencils/include -isystem /usr/lib/x86_64-linux-gnu/openmpi/include/openmpi -isystem /usr/lib/x86_64-linux-gnu/openmpi/include  -Wall -Wconversion -Wshadow -Wno-c++11-extensions -Qunused-arguments -pthread -pthread -g   -std=gnu++17 -DWALBERLA_BUILD_WITH_AVX -mavx2 -o CMakeFiles/ExampleAppCodegen.dir/ExampleAppAVX.cpp.o -c /work/jgrad/walberla_deps/devel/example_app/apps/example_app_codegen/ExampleApp.cpp)
 (cd /work/jgrad/walberla_deps/devel/example_app/build/apps/example_app_codegen && /tikhome/jgrad/.local/lib/python3.8/site-packages/cmake/data/bin/cmake -E cmake_link_script CMakeFiles/ExampleAppCodegen.dir/link.txt --verbose=1
 /usr/bin/clang++   -Wall -Wconversion -Wshadow -Wno-c++11-extensions -Qunused-arguments -pthread -pthread -g    CMakeFiles/ExampleAppCodegen.dir/ExampleAppAVX.cpp.o  -o ExampleAppCodegenAVX  -Wl,-rpath,/usr/lib/x86_64-linux-gnu/openmpi/lib ../../walberla/src/blockforest/libblockforest.a ../../walberla/src/core/libcore.a ../../walberla/src/field/libfield.a ../../walberla/src/lbm/liblbm.a ../../walberla/src/geometry/libgeometry.a ../../walberla/src/timeloop/libtimeloop.a ../../walberla/src/gui/libgui.a libLatticeModelGenerated.a ../../walberla/src/domain_decomposition/libdomain_decomposition.a ../../walberla/src/vtk/libvtk.a ../../walberla/src/boundary/libboundary.a ../../walberla/src/blockforest/libblockforest.a ../../walberla/src/core/libcore.a ../../walberla/src/field/libfield.a ../../walberla/src/lbm/liblbm.a ../../walberla/src/geometry/libgeometry.a ../../walberla/src/timeloop/libtimeloop.a ../../walberla/src/gui/libgui.a libLatticeModelGenerated.a ../../walberla/src/domain_decomposition/libdomain_decomposition.a ../../walberla/src/vtk/libvtk.a ../../walberla/src/boundary/libboundary.a ../../walberla/src/blockforest/libblockforest.a ../../walberla/src/core/libcore.a ../../walberla/src/field/libfield.a ../../walberla/src/lbm/liblbm.a ../../walberla/src/geometry/libgeometry.a ../../walberla/src/timeloop/libtimeloop.a ../../walberla/src/gui/libgui.a libLatticeModelGenerated.a ../../walberla/src/domain_decomposition/libdomain_decomposition.a ../../walberla/src/vtk/libvtk.a ../../walberla/src/boundary/libboundary.a /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi.so /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi.so /usr/lib/libpfft.so /usr/lib/x86_64-linux-gnu/libfftw3.so /usr/lib/x86_64-linux-gnu/libfftw3_mpi.so ../../walberla/extern/lodepng/liblodepng.a /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_cxx.so /usr/lib/libpfft.so /usr/lib/x86_64-linux-gnu/libfftw3.so /usr/lib/x86_64-linux-gnu/libfftw3_mpi.so)
 ```