Add a CMake option to link the C runtime statically.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ae0f8ea..157097e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,16 @@
cmake_minimum_required(VERSION 2.4.4...3.15.0)
set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)
+if(POLICY CMP0091)
+ cmake_policy(SET CMP0091 NEW)
+endif()
+
project(zlib C)
set(VERSION "1.3.0.1")
+option(ZLIB_STATIC_LINK_CRT "Link the MSVC runtime library statically" OFF)
+
set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
set(INSTALL_INC_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")
@@ -76,12 +82,24 @@
endif()
set(ZLIB_PC ${CMAKE_CURRENT_BINARY_DIR}/zlib.pc)
-configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zlib.pc.cmakein
- ${ZLIB_PC} @ONLY)
-configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.cmakein
- ${CMAKE_CURRENT_BINARY_DIR}/zconf.h @ONLY)
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/zlib.pc.cmakein
+ ${ZLIB_PC} @ONLY)
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.cmakein
+ ${CMAKE_CURRENT_BINARY_DIR}/zconf.h @ONLY)
include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR})
+if(POLICY CMP0091)
+ # CMake >= 3.15 has CMAKE_MSVC_RUNTIME_LIBRARY to set the MSVCC runtime library
+ if(WIN32 AND CMAKE_GENERATOR MATCHES "Visual Studio .*|NMake .*")
+ if(ZLIB_STATIC_LINK_CRT)
+ message(STATUS "Configuring to link the MSVC runtime library statically")
+ set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+ else()
+ message(STATUS "Configuring to link the MSVC runtime library dynamically")
+ set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+ endif()
+ endif()
+endif()
#============================================================================
# zlib
