From 8737453498d7dc4b62458e53f5318c76bc40865d Mon Sep 17 00:00:00 2001
From: Gleb Mazovetskiy <glex.spb@gmail.com>
Date: Wed, 20 Jan 2021 19:19:36 +0000
Subject: [PATCH] cmake: Compiler-specific whole-archive macro

---
 CMakeLists.txt             |  1 +
 apps/opencs/CMakeLists.txt |  4 ++--
 apps/openmw/CMakeLists.txt |  4 ++--
 cmake/WholeArchive.cmake   | 10 ++++++++++
 4 files changed, 15 insertions(+), 4 deletions(-)
 create mode 100644 cmake/WholeArchive.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f883aecfc..658a961f3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,6 +89,7 @@ endif(EXISTS ${PROJECT_SOURCE_DIR}/.git)
 
 # Macros
 include(OpenMWMacros)
+include(WholeArchive)
 
 # doxygen main page
 
diff --git a/apps/opencs/CMakeLists.txt b/apps/opencs/CMakeLists.txt
index e6df90919..17b3375f5 100644
--- a/apps/opencs/CMakeLists.txt
+++ b/apps/opencs/CMakeLists.txt
@@ -237,8 +237,8 @@ if(OSG_STATIC)
         target_link_libraries(openmw_cs_osg_plugins INTERFACE ${${_plugin_uc}_LIBRARY})
     endforeach()
     # We use --whole-archive because OSG plugins use registration.
-    target_link_options(openmw_cs_osg_plugins INTERFACE
-        -Wl,--whole-archive ${_osg_plugins_static_files} -Wl,--no-whole-archive)
+    get_whole_archive_options(_opts ${_osg_plugins_static_files})
+    target_link_options(openmw_cs_osg_plugins INTERFACE ${_opts})
     target_link_libraries(openmw-cs openmw_cs_osg_plugins)
 endif(OSG_STATIC)
 
diff --git a/apps/openmw/CMakeLists.txt b/apps/openmw/CMakeLists.txt
index c87a96b3a..308b8bd5e 100644
--- a/apps/openmw/CMakeLists.txt
+++ b/apps/openmw/CMakeLists.txt
@@ -152,8 +152,8 @@ if(OSG_STATIC)
         target_link_libraries(openmw_osg_plugins INTERFACE ${${_plugin_uc}_LIBRARY})
     endforeach()
     # We use --whole-archive because OSG plugins use registration.
-    target_link_options(openmw_osg_plugins INTERFACE
-        -Wl,--whole-archive ${_osg_plugins_static_files} -Wl,--no-whole-archive)
+    get_whole_archive_options(_opts ${_osg_plugins_static_files})
+    target_link_options(openmw_osg_plugins INTERFACE ${_opts})
     target_link_libraries(openmw openmw_osg_plugins)
 endif(OSG_STATIC)
 
diff --git a/cmake/WholeArchive.cmake b/cmake/WholeArchive.cmake
new file mode 100644
index 000000000..a834e830e
--- /dev/null
+++ b/cmake/WholeArchive.cmake
@@ -0,0 +1,10 @@
+macro (get_whole_archive_options OUT_VAR)
+    # We use --whole-archive because OSG plugins use registration.
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+        set(${OUT_VAR} -Wl,--whole-archive ${ARGN} -Wl,--no-whole-archive)
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
+        set(${OUT_VAR} -Wl,-all_load ${ARGN} -Wl,-noall_load)
+    else ()
+        message(FATAL_ERROR "get_whole_archive_options not implemented for CMAKE_CXX_COMPILER_ID ${CMAKE_CXX_COMPILER_ID}")
+    endif()
+endmacro (whole_archive_options)