From 74467db24e5254bddedb2ce95ac0c427b9ea588d Mon Sep 17 00:00:00 2001
From: Frank Richter <frank.richter@gmail.com>
Date: Wed, 17 Apr 2024 22:09:29 +0200
Subject: [PATCH] Always provide a target 'z' for zlib

---
 extern/CMakeLists.txt |  7 +++++++
 src/CMakeLists.txt    | 23 ++++-------------------
 2 files changed, 11 insertions(+), 19 deletions(-)

diff --git a/extern/CMakeLists.txt b/extern/CMakeLists.txt
index e8edea14a..cb003b530 100644
--- a/extern/CMakeLists.txt
+++ b/extern/CMakeLists.txt
@@ -5,6 +5,9 @@
 
 if(USE_SYSTEM_ZLIB)
     find_package(ZLIB REQUIRED)
+
+    add_library(z INTERFACE IMPORTED GLOBAL)
+    target_link_libraries(z INTERFACE ZLIB::ZLIB)
 else()
     add_subdirectory(zlib)
     target_include_directories(zlibstatic PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/zlib> $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/zlib>)
@@ -13,6 +16,10 @@ else()
     set_target_properties(zlibstatic PROPERTIES FOLDER extern POSITION_INDEPENDENT_CODE ON)
     set_target_properties(minigzip PROPERTIES FOLDER extern)
     set_target_properties(example PROPERTIES FOLDER extern)
+
+    add_library(z INTERFACE IMPORTED GLOBAL)
+    target_link_libraries(z INTERFACE zlibstatic)
+    target_include_directories(z INTERFACE "${ZLIB_INCLUDE_DIRS}")
 endif()
 
 #
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fa5e85eeb..feaa33d7a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -549,9 +549,6 @@ TARGET_INCLUDE_DIRECTORIES(game PRIVATE ../inc)
 
 IF(TARGET client)
     TARGET_INCLUDE_DIRECTORIES(client PRIVATE ../inc)
-    IF(NOT USE_SYSTEM_ZLIB)
-      TARGET_INCLUDE_DIRECTORIES(client PRIVATE "${ZLIB_INCLUDE_DIRS}")
-    ENDIF()
 ENDIF()
 
 TARGET_INCLUDE_DIRECTORIES(server PRIVATE ../inc)
@@ -564,22 +561,10 @@ if(TARGET client)
     endif()
 endif()
 
-if(NOT USE_SYSTEM_ZLIB)
-    TARGET_INCLUDE_DIRECTORIES(server PRIVATE "${ZLIB_INCLUDE_DIRS}")
-endif()
-
-if(USE_SYSTEM_ZLIB)
-    TARGET_LINK_LIBRARIES(server z)
-    TARGET_LINK_LIBRARIES(game z)
-    if(TARGET client)
-        TARGET_LINK_LIBRARIES(client z)
-    endif()
-else()
-    TARGET_LINK_LIBRARIES(server zlibstatic)
-    TARGET_LINK_LIBRARIES(game zlibstatic)
-    if(TARGET client)
-        TARGET_LINK_LIBRARIES(client zlibstatic)
-    endif()
+TARGET_LINK_LIBRARIES(server z)
+TARGET_LINK_LIBRARIES(game z)
+if(TARGET client)
+    TARGET_LINK_LIBRARIES(client z)
 endif()
 
 IF(UNIX)