Start modernising

This commit starts to modernise the cmake, add a DevContainer and fix some warnings.

.devcontainer/Dockerfile

@@ -0,0 +1,26 @@
+FROM ubuntu:noble
+
+# Update system
+RUN apt-get update -y && apt-get upgrade -y
+
+# Install dependencies for Sparselizard
+RUN apt-get install -y \
+    clang clang-format cmake zsh git curl \
+    libopenblas-dev \
+    libopenmpi-dev \
+    libmumps-dev \
+    libmetis-dev \
+    petsc-dev \
+    slepc-dev \
+    libgmsh-dev \
+    libomp-dev
+
+# Fix git issues with the container running as root
+RUN git config --global --add safe.directory '*'
+
+# Install Oh My Zsh for convenience
+RUN chsh -s $(which zsh)
+RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" || true
+
+# Set the default shell to Zsh
+CMD ["zsh"]

.devcontainer/devcontainer.json

@@ -0,0 +1,14 @@
+{
+    "build": {
+        "dockerfile": "Dockerfile"
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-vscode.cpptools-extension-pack",
+                "DavidAnson.vscode-markdownlint",
+                "ms-azuretools.vscode-docker"
+            ]
+        }
+    }
+}

CMakeLists.txt

@@ -1,43 +1,111 @@
 # Thanks to S. Matsievskiy for bringing cmake to the project.
 
-cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.23 FATAL_ERROR)
 
 project(Sparselizard LANGUAGES CXX)
 
 set(DEFAULT_BUILD_TYPE "Release")
 set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}" CACHE STRING "Choose the type of build" FORCE)
 
-set(PETSC_PATH "~/SLlibs/petsc" CACHE STRING "Provide the path to the petsc folder")
-set(GMSH_PATH "~/SLlibs/gmsh" CACHE STRING "Provide the path to the gmsh folder")
-set(MPI_PATH "" CACHE STRING "Provide the path to the mpi folder")
-
 # Place library in build folder:
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+SET(CMAKE_CXX_STANDARD 17)
+SET(CMAKE_CXX_FLAGS_DEBUG "-g -Og -Wall -Wextra -Wpedantic")
+SET(CMAKE_CXX_FLAGS_RELEASE "-O3")
+
+# TODO: get this working
+#set(CMAKE_CXX_COMPILER "clang++")
+#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
+
+if(NOT BLA_VENDOR)
+    set(BLA_VENDOR CACHE STRING OpenBLAS)
+endif()
 
-# Default flags:
-set(BLAS_FOUND NO)
-set(GMSH_FOUND NO)
-set(METIS_FOUND NO)
-set(MPI_FOUND NO)
-set(MUMPS_FOUND NO)
-set(PETSC_FOUND NO)
-set(SLEPC_FOUND NO)
+if(NOT PETSC_DIR AND NOT(APPLE))
+    set(PETSC_DIR CACHE STRING /usr/lib/petscdir)
+endif()
+
+# Add cmake packages
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+list(APPEND CMAKE_PREFIX_PATH $<$<BOOL:${APPLE}>:/opt/homebrew/opt/openblas> ${PETSC_DIR})
 
 # Installation definitions
 include(GNUInstallDirs)
-# Aux functions
-include(cMake/functions.cmake)
-include(cMake/SetupBLAS.cmake)
-include(cMake/SetupGMSH.cmake)
-include(cMake/SetupMETIS.cmake)
-include(cMake/SetupMPI.cmake)
-include(cMake/SetupMUMPS.cmake)
-include(cMake/SetupPETSC.cmake)
-include(cMake/SetupSLEPC.cmake)
-
-# Add libsparselizard target
-add_subdirectory(src)
-
-# Add simulations targets
-add_subdirectory(simulations)
 
+# this is not the cmake-official way but it's a lot easier
+set(INCLUDE_DIRS
+    src
+    src/mesh
+    src/gausspoint
+    src/io
+    src/io/paraview
+    src/io/nastran
+    src/io/gmsh
+    src/field
+    src/resolution
+    src/geometry
+    src/expression
+    src/expression/operation
+    src/shapefunction
+    src/shapefunction/hierarchical
+    src/shapefunction/hierarchical/h1
+    src/shapefunction/hierarchical/hcurl
+    src/shapefunction/lagrange
+    src/formulation
+)
+file(GLOB_RECURSE SRC_FILES "src/*.cpp")
+file(GLOB_RECURSE SRC_HEADERS "src/*.h")
+add_library(sparselizard SHARED ${SRC_FILES})
+# Note: the following would allow hierarchical install, but sparselizard acts as if it's flattened
+# target_sources(sparselizard PUBLIC FILE_SET HEADERS FILES ${SRC_HEADERS} BASE_DIRS src)
+target_precompile_headers(sparselizard PUBLIC ${SRC_HEADERS})
+target_include_directories(sparselizard PUBLIC ${INCLUDE_DIRS})
+set_target_properties(sparselizard PROPERTIES PUBLIC_HEADER "${SRC_HEADERS}")
+
+target_compile_options(sparselizard PUBLIC -fPIC -O3)
+
+find_package(OpenMP REQUIRED)
+target_link_libraries(sparselizard PUBLIC OpenMP::OpenMP_CXX)
+
+find_package(MPI REQUIRED)
+target_link_libraries(sparselizard PUBLIC MPI::MPI_CXX)
+
+find_package(BLAS REQUIRED)
+target_link_libraries(sparselizard PUBLIC BLAS::BLAS)
+
+find_package(PETSC REQUIRED)
+target_link_libraries(sparselizard PUBLIC PETSC::PETSC)
+
+find_package(SLEPC)
+target_link_libraries(sparselizard PUBLIC SLEPC::SLEPC)
+
+find_package(GMSH)
+if(GMSH_FOUND)
+    target_link_libraries(sparselizard PUBLIC GMSH::GMSH)
+    target_compile_definitions(sparselizard PRIVATE -DHAVE_GMSH)
+endif()
+
+find_package(METIS)
+
+if(METIS_FOUND)
+    target_link_libraries(sparselizard PUBLIC METIS::METIS)
+    target_compile_definitions(sparselizard PRIVATE -DHAVE_METIS)
+endif()
+
+target_link_libraries(sparselizard PUBLIC cmumps)
+target_compile_definitions(sparselizard PRIVATE
+    -DHAVE_BLAS
+    -DHAVE_MPI
+    -DHAVE_MUMPS
+    -DHAVE_PETSC
+    -DHAVE_SLEPC
+)
+
+install(TARGETS sparselizard LIBRARY PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_PREFIX}/include/sparselizard)
+
+set(BUILD_SIMULATIONS YES)
+
+if(BUILD_SIMULATIONS)
+    add_subdirectory(simulations)
+    message(STATUS "Building simulations")
+endif()