Added option to build the static library with PIC

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 83defae..bf3a97b 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 2.8.9)
 
 if(NOT DEFINED CMAKE_BUILD_TYPE)
        set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type")
@@ -87,6 +87,7 @@ option(LWS_IPV6 "Compile with support for ipv6" OFF)
 option(LWS_WITH_HTTP2 "Compile with support for http2" OFF)
 option(LWS_MBED3 "Platform is MBED3" OFF)
 option(LWS_SSL_SERVER_WITH_ECDH_CERT "Include SSL server use ECDH certificate" OFF)
+option(LWS_STATIC_PIC "Build the static version of the library with position-independent code" OFF)
 
 if (DEFINED YOTTA_WEBSOCKETS_VERSION_STRING)
 
@@ -543,6 +544,9 @@ source_group("Sources"          FILES ${SOURCES})
 set(LWS_LIBRARIES)
 
 if (LWS_WITH_STATIC)
+    if (LWS_STATIC_PIC)
+        set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+    endif()
        add_library(websockets STATIC
                                ${HDR_PRIVATE}
                                ${HDR_PUBLIC}
@@ -1224,6 +1228,7 @@ message(" LWS_MBED3 = ${LWS_MBED3}")
 message(" LWS_SSL_SERVER_WITH_ECDH_CERT = ${LWS_SSL_SERVER_WITH_ECDH_CERT}")
 message(" LWS_MAX_SMP = ${LWS_MAX_SMP}")
 message(" LWS_HAVE_OPENSSL_ECDH_H = ${LWS_HAVE_OPENSSL_ECDH_H}")
+message(" LWS_STATIC_PIC = ${LWS_STATIC_PIC}")
 message("---------------------------------------------------------------------")
 
 # These will be available to parent projects including libwebsockets using add_subdirectory()