From 22c3219ff01a6a5618f69edb383827609a1eacee Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Fri, 16 Jul 2021 23:11:59 +0200
Subject: [PATCH] Set correct flags for static builds

this is only really relevant on Windows
---
 source/Irrlicht/CMakeLists.txt | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/source/Irrlicht/CMakeLists.txt b/source/Irrlicht/CMakeLists.txt
index 38dbbacf..5d803f0d 100644
--- a/source/Irrlicht/CMakeLists.txt
+++ b/source/Irrlicht/CMakeLists.txt
@@ -1,11 +1,16 @@
-add_definitions(-DIRRLICHT_EXPORTS=1)
+option(BUILD_SHARED_LIBS "Build shared library" TRUE)
+
+# Compiler flags
+
+add_definitions(-DIRRLICHT_EXPORTS)
+if(NOT BUILD_SHARED_LIBS)
+	add_definitions(-D_IRR_STATIC_LIB_)
+endif()
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
 	add_definitions(-D_DEBUG)
 endif()
 set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
 
-# Compiler flags
-
 if(CMAKE_CXX_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
 	set(CMAKE_CXX_FLAGS_RELEASE "-O3")
 	set(CMAKE_CXX_FLAGS_DEBUG "-g")
@@ -388,8 +393,6 @@ add_library(IRRGUIOBJ OBJECT
 
 # Library
 
-option(BUILD_SHARED_LIBS "Build shared library" TRUE)
-
 add_library(IrrlichtMt)
 foreach(object_lib
 	IRRMESHOBJ IRROBJ IRRPARTICLEOBJ IRRANIMOBJ IRRVIDEOOBJ IRRSWRENDEROBJ
@@ -414,6 +417,11 @@ target_include_directories(IrrlichtMt
 
 target_link_libraries(IrrlichtMt PRIVATE ${link_libs})
 
+# Propagate static library flag to lib users, only needed for Windows
+if(NOT BUILD_SHARED_LIBS)
+	target_compile_definitions(IrrlichtMt INTERFACE _IRR_STATIC_LIB_)
+endif()
+
 set_target_properties(IrrlichtMt PROPERTIES
 	VERSION ${PROJECT_VERSION}
 	SOVERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}