cmake: integrate systemc build into cmake build (offer source/external integration, mainly for own cmake experiments)

2 files changed, 60 insertions, 0 deletions

diff --git a/cmake/CMakeLists-sysc-external.txt b/cmake/CMakeLists-sysc-external.txt
new file mode 100644
index 0000000..8346c34
--- /dev/null
+++ b/cmake/CMakeLists-sysc-external.txt
@@ -0,0 +1,40 @@
+# Integrate SYSTEMC as external project.
+# 
+# External projects are not available during cmake configuration step, but only
+# during the build step. Therefore we must maintain some targets manually,
+# representing the parts of the external project we want to use (eg library).
+
+include(ExternalProject)
+
+set(SYSTEMC_HOME ${CMAKE_BINARY_DIR}/deps/systemc)
+
+ExternalProject_Add(
+    systemc_external
+    GIT_REPOSITORY https://github.com/accellera-official/systemc
+    GIT_TAG        master
+    GIT_SHALLOW    ON
+    GIT_PROGRESS   ON
+    CMAKE_ARGS
+        # Fwd cmake outer cmake args.
+        -DCMAKE_INSTALL_PREFIX=${SYSTEMC_HOME}
+        -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+        -DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}
+        # SystemC specific args.
+        -DBUILD_SHARED_LIBS=OFF
+        -DENABLE_ASSERTIONS=ON
+    INSTALL_BYPRODUCTS
+        ${CMAKE_BINARY_DIR}/deps/systemc/lib/libsystemc.a
+)
+
+# Define pseudo target (import lib) for usage in cmake.
+add_library(SystemC::systemc STATIC IMPORTED GLOBAL)
+add_dependencies(SystemC::systemc systemc_external)
+
+# Create include dir such that we can set include dir property below.
+file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/deps/systemc/include)
+
+# Set library properties.
+set_target_properties(SystemC::systemc PROPERTIES
+    IMPORTED_LOCATION             ${SYSTEMC_HOME}/lib/libsystemc.a
+    INTERFACE_INCLUDE_DIRECTORIES ${SYSTEMC_HOME}/include
+)
diff --git a/cmake/CMakeLists-sysc-fetch.txt b/cmake/CMakeLists-sysc-fetch.txt
new file mode 100644
index 0000000..4afd154
--- /dev/null
+++ b/cmake/CMakeLists-sysc-fetch.txt
@@ -0,0 +1,20 @@
+# Integrate SYSTEMC as source project.
+# 
+# FetchContent makes the dependency available during cmake configuration step
+# and acts similar to *add_subdirectory*, that means all targets of the
+# sub-project are available in the main project.
+#
+# NOTE: Target name must be unique across the main project and all sub-project,
+# names may clash :^)
+
+include(FetchContent)
+
+FetchContent_Declare(
+    systemc
+    GIT_REPOSITORY https://github.com/accellera-official/systemc
+    GIT_TAG        master
+    EXCLUDE_FROM_ALL
+)
+
+# This makes all targets from the sub-project available.
+FetchContent_MakeAvailable(systemc)