Add BUILD_CORE_ALONE mode to compile Core library

aidge/_Core/CMakeLists.txt

 
-# project(Aidge_Core)
+if (BUILD_CORE_ALONE)
+    project(Aidge_Core)
+    cmake_minimum_required(VERSION 3.11)
+    add_compile_options(-Wall -Wextra -fPIC)
+endif()
 
 if (PYBIND)
-    generate_python_binding(aidge_core core)
+    Include(FetchContent)
+
+    FetchContent_Declare(
+    PyBind11
+    GIT_REPOSITORY https://github.com/pybind/pybind11.git
+    GIT_TAG        v2.10.4 # or a later release
+    )
+
+    FetchContent_MakeAvailable(PyBind11)
+    file(GLOB_RECURSE pybind_src_files "python_binding/*.cpp")
+    pybind11_add_module(aidge_core MODULE ${pybind_src_files} "NO_EXTRAS")
+    target_include_directories(aidge_core PUBLIC ${pybind11_INCLUDE_DIRS} "python_binding")
+    target_link_libraries(aidge_core PUBLIC core)
+    # generate_python_binding(aidge_core core)
 endif()
 
 add_library(core STATIC)
@@ -21,8 +38,14 @@ if (PYBIND)
     target_link_libraries(core PRIVATE ${PYTHON_LIBRARIES})
 endif()
 
+if (NOT BUILD_CORE_ALONE)
+    # Activate compile time reducer for aidge_core
+    set_target_properties(core PROPERTIES COTIRE_ADD_UNITY_BUILD FALSE)
+    # set_target_properties(n2d2_cpu_lib PROPERTIES COTIRE_CXX_PREFIX_HEADER_INIT "include/utils/Precompiled.hpp")
+    cotire(core)
+endif()
+
 
-# Activate compile time reducer for aidge_core
-set_target_properties(core PROPERTIES COTIRE_ADD_UNITY_BUILD FALSE)
-# set_target_properties(n2d2_cpu_lib PROPERTIES COTIRE_CXX_PREFIX_HEADER_INIT "include/utils/Precompiled.hpp")
-cotire(core)
+if (TESTS)
+    add_subdirectory(tests)
+endif()
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aidge/_Core/Makefile

 # This makefile does nothing but delegating the actual building to cmake
 BUILDDIR := build
-MAKEFLAGS := --no-print-directory
+MAKEFLAGS := --no-print-directory
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+
+all: core_with_pybind
+
+core_only:
+	mkdir -p ${BUILDDIR}; \
+	cd ${BUILDDIR}; \
+	cmake -DBUILD_CORE_ALONE=ON -DCMAKE_BUILD_TYPE=Release -DPYBIND=OFF -DTESTS=OFF ..; \
+	${MAKE} ${MAKEFLAGS};
+
+core_tests:
+	mkdir -p ${BUILDDIR}; \
+	cd ${BUILDDIR}; \
+	cmake -DBUILD_CORE_ALONE=ON -DCMAKE_BUILD_TYPE=Debug -DPYBIND=OFF -DTESTS=ON ..; \
+	${MAKE} ${MAKEFLAGS}; \
+	cd tests; \
+	ctest --output-on-failure || true;
+
+core_with_pybind:
+	mkdir -p ${BUILDDIR}; \
+	cd ${BUILDDIR}; \
+	cmake -DBUILD_CORE_ALONE=ON -DCMAKE_BUILD_TYPE=Release -DPYBIND=ON -DTESTS=OFF ..; \
+	${MAKE} ${MAKEFLAGS};
+
+core_with_pybind_tests:
+	mkdir -p ${BUILDDIR}; \
+	cd ${BUILDDIR}; \
+	cmake -DBUILD_CORE_ALONE=ON -DCMAKE_BUILD_TYPE=Debug -DPYBIND=ON -DTESTS=ON ..; \
+	${MAKE} ${MAKEFLAGS}; \
+	cd tests; \
+	ctest --output-on-failure || true;
+
+clean:
+	if [ -d "${BUILDDIR}" ]; then rm -rf ${BUILDDIR}; fi
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aidge/_Core/README.md

+# Aidge Core library
+
+You can find here the C++ code of the Core library of Aidge.
+
+## Compilation
+
+To only compile the Core library, run
+```
+make core_only
+```
+
+To compile the Core library + the associated unitary tests, run
+```
+make core_tests
+```
+
+To compile the Core library with the python binding, run
+```
+make core_with_pybind
+```
+Important: this command can also be run with `make`.
+
+
+To compile the Core library with the python binding + the associated unitary tests, run
+```
+make core_with_pybind_tests
+```
+