Cloned the building method to the C++ CepGenProcessExample repo

Author: forthommel

.gitignore

@@ -1,2 +1,5 @@
 *.o
 *.so
+build/
+install/
+__pycache__/

CMakeLists.txt

@@ -1,23 +1,26 @@
 cmake_minimum_required(VERSION 3.20 FATAL_ERROR)
-project(CepGenGrapeProcess)
 enable_language(Fortran)
-
-set(CEPGEN_PATH ${CEPGEN_PATH} $ENV{CEPGEN_PATH})
-if(NOT CEPGEN_PATH)
-  set(CEPGEN_PATH /usr/local)
-endif()
 if(NOT PROCESS_NAME)
-  set(PROCESS_NAME FortranProcess)
+  set(PROCESS_NAME CepGenFortranProcessExample)  # replace this with the beautiful name of your process
 endif()
-set(CMAKE_MODULE_PATH ${CEPGEN_PATH}/cmake)
+
+project(${PROCESS_NAME})
+
+set(CEPGEN_PATH ${CEPGEN_PATH} $ENV{CEPGEN_PATH})
+set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake ${CEPGEN_PATH}/cmake)
+
 find_package(CepGen REQUIRED)
 
 file(GLOB SOURCES *.cpp)
 file(GLOB_RECURSE F77_SOURCES src/*.f)
 
-add_library(CepGen${PROCESS_NAME} SHARED ${SOURCES} ${F77_SOURCES})
-target_link_libraries(CepGen${PROCESS_NAME} PRIVATE ${CepGen_LIBRARIES})
-target_include_directories(CepGen${PROCESS_NAME} PRIVATE ${CepGen_INCLUDE_DIRS})
+add_library(${PROCESS_NAME} SHARED ${SOURCES} ${F77_SOURCES})
+target_link_libraries(${PROCESS_NAME} PRIVATE CepGen::CepGen)
+
+# in case you need to link your process definition with other external libraries, you can use
+# the standard CMake directives:
+#target_link_libraries(${PROCESS_NAME} PUBLIC ${other_LIBRARIES})
+#target_include_directories(${PROCESS_NAME} PRIVATE ${other_INCLUDE_DIRS})
 
 file(GLOB_RECURSE input_cards RELATIVE ${PROJECT_SOURCE_DIR} cards/*)
 foreach(_files ${input_cards})

cmake/FindCepGen.cmake

@@ -0,0 +1,42 @@
+find_package(PkgConfig)
+pkg_check_modules(PC_CepGen QUIET CepGen)
+
+set(CEPGEN_PATHS $ENV{CEPGEN_PATH} ${CEPGEN_PATH})
+
+find_path(CepGen_INCLUDE_DIR
+    NAMES CepGen/Generator.h
+    PATHS ${PC_CepGen_INCLUDE_DIRS} ${CEPGEN_PATHS}
+    PATH_SUFFIXES include)
+find_path(CepGen_DATA_DIR
+    NAMES mstw_sf_scan_nnlo.dat
+    PATHS ${PC_CepGen_INCLUDE_DIRS} ${CEPGEN_PATHS}
+    PATH_SUFFIXES share External)
+find_library(CepGen_LIBRARY
+    NAMES CepGen
+    PATHS ${PC_CepGEN_LIBRARY_DIRS} ${CEPGEN_PATHS}
+    PATH_SUFFIXES lib64 lib build)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(CepGen
+    FOUND_VAR CepGen_FOUND
+    REQUIRED_VARS CepGen_LIBRARY CepGen_INCLUDE_DIR
+    VERSION_VAR CepGen_VERSION)
+
+if(CepGen_FOUND)
+    set(CepGen_LIBRARIES ${CepGen_LIBRARY})
+    set(CepGen_INCLUDE_DIRS ${CepGen_INCLUDE_DIR})
+    set(CepGen_DATA_DIRS ${CepGen_DATA_DIR})
+    set(CepGen_DEFINITIONS ${PC_CepGen_CFLAGS_OTHER})
+else()
+    message(STATUS "CepGen path was not found. Did you set the $CEPGEN_PATH environment variable?")
+endif()
+
+if(CepGen_FOUND AND NOT TARGET CepGen::CepGen)
+  add_library(CepGen::CepGen UNKNOWN IMPORTED)
+  set_target_properties(CepGen::CepGen PROPERTIES
+    IMPORTED_LOCATION "${CepGen_LIBRARY}"
+    INTERFACE_COMPILE_OPTIONS "${PC_CepGen_CFLAGS_OTHER}"
+    INTERFACE_INCLUDE_DIRECTORIES "${CepGen_INCLUDE_DIR}")
+endif()
+
+mark_as_advanced(CepGen_INCLUDE_DIR CepGen_LIBRARY)