From 4b8fe52c3c9d8bbedb7c26e410b83a2ed4d9035f Mon Sep 17 00:00:00 2001
From: Peter Franz <Peter.Franz@FlowStateSolutions.co.nz>
Date: Mon, 10 Oct 2022 07:58:07 +1300
Subject: [PATCH] CMake building of doc and dwg2dxf optional

---
 CMakeLists.txt | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 231fcbe..ef70ae9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,11 @@ CMAKE_MINIMUM_REQUIRED(VERSION 3.0)
 cmake_policy(SET CMP0048 NEW)
 project(DXFRW VERSION 1.0.1)
 
+# set preferred cache variables
+set(LIBDXFRW_BUILD_DOC TRUE CACHE BOOL "Build the documentation")
+set(LIBDXFRW_BUILD_DWG2DXF TRUE CACHE BOOL "Build the dwg2dxf application")
+
+
 # set compiler warnings
 if (MSVC)
     add_compile_options(/W4 /WX)
@@ -90,15 +95,19 @@ target_include_directories(dxfrw
 			$<INSTALL_INTERFACE:${LIBDXFRW_INSTALL_INCLUDEDIR}>
 )
 
-add_custom_command(OUTPUT doc/html/index.html
-	COMMAND doxygen ARGS ${CMAKE_CURRENT_SOURCE_DIR}/libdxfrw.dox
-	MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/libdxfrw.dox
-	VERBATIM)
+if(LIBDXFRW_BUILD_DOC)
+    add_custom_command(OUTPUT doc/html/index.html
+	    COMMAND doxygen ARGS ${CMAKE_CURRENT_SOURCE_DIR}/libdxfrw.dox
+	    MAIN_DEPENDENCY ${CMAKE_CURRENT_SOURCE_DIR}/libdxfrw.dox
+	    VERBATIM)
 
-add_custom_target(doc
-	DEPENDS doc/html/index.html)
+    add_custom_target(doc
+	    DEPENDS doc/html/index.html)
+endif()
 
-add_subdirectory(dwg2dxf)
+if(LIBDXFRW_BUILD_DWG2DXF)
+    add_subdirectory(dwg2dxf)
+endif()
 
 # INSTALLATION
 set(INSTALL_CONFIGDIR ${CMAKE_INSTALL_LIBDIR}/cmake/libdxfrw)