From dcea35a1bfc12d5ff35929971cba5a48638deb85 Mon Sep 17 00:00:00 2001
From: Johannes Stoelp <johannes.stoelp@gmail.com>
Date: Sat, 4 Nov 2023 01:58:40 +0100
Subject: cmake: integrate systemc build into cmake build (offer
 source/external integration, mainly for own cmake experiments)

---
 cmake/CMakeLists-sysc-external.txt | 40 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 cmake/CMakeLists-sysc-external.txt

(limited to 'cmake/CMakeLists-sysc-external.txt')

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
+)
-- 
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