From 97a11c107e31fa0c4ce2003e49cf51b3c8d987b1 Mon Sep 17 00:00:00 2001
From: hasufell <hasufell@hasufell.de>
Date: Thu, 6 Mar 2014 15:49:08 +0100
Subject: [PATCH] CMake: allow to build both shared and static at once

This allows for more fine-grained control. Possible combinations:
  * static off, shared on
  * static on, shared off
  * static on, shared on

The static library is always called "libpolarssl.a" and is only used
for linking of tests and internal programs if the shared lib is
not being built.

Default is: only build static lib.
---
 library/CMakeLists.txt | 47 ++++++++++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 11 deletions(-)

diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 17b403fb4..dac62a8d0 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -1,4 +1,5 @@
-option(USE_SHARED_POLARSSL_LIBRARY "Build PolarSSL as a shared library." OFF)
+option(USE_STATIC_POLARSSL_LIBRARY "Build PolarSSL static library." ON)
+option(USE_SHARED_POLARSSL_LIBRARY "Build PolarSSL shared library." OFF)
 
 set(src
      aes.c
@@ -52,19 +53,43 @@ if(WIN32)
 set(libs ws2_32)
 endif(WIN32)
 
-if(NOT USE_SHARED_POLARSSL_LIBRARY)
+if(CMAKE_COMPILER_IS_GNUCC)
+  set(CMAKE_C_FLAGS_CHECK "${CMAKE_C_FLAGS_CHECK} -Wmissing-declarations -Wmissing-prototypes")
+  set(CMAKE_C_FLAGS_CHECKFULL "${CMAKE_C_FLAGS_CHECK} -Wcast-qual")
+endif(CMAKE_COMPILER_IS_GNUCC)
 
-add_library(polarssl STATIC ${src})
+if (NOT USE_STATIC_POLARSSL_LIBRARY AND NOT USE_SHARED_POLARSSL_LIBRARY)
+	message(FATAL_ERROR "Need to choose static or shared polarssl build!")
+endif(NOT USE_STATIC_POLARSSL_LIBRARY AND NOT USE_SHARED_POLARSSL_LIBRARY)
 
-else(NOT USE_SHARED_POLARSSL_LIBRARY)
+if(USE_STATIC_POLARSSL_LIBRARY AND USE_SHARED_POLARSSL_LIBRARY)
+	# if we build both static an shared, then let
+	# tests and programs link to the shared lib target
+	set(polarssl_static_target "polarssl_static")
+elseif(USE_STATIC_POLARSSL_LIBRARY)
+	set(polarssl_static_target "polarssl")
+endif()
 
-add_library(polarssl SHARED ${src})
-set_target_properties(polarssl PROPERTIES VERSION 1.2.10 SOVERSION 3)
+if(USE_STATIC_POLARSSL_LIBRARY)
+	add_library(${polarssl_static_target} STATIC ${src})
+	set_target_properties(${polarssl_static_target} PROPERTIES OUTPUT_NAME polarssl)
 
-endif(NOT USE_SHARED_POLARSSL_LIBRARY)
+	install(TARGETS ${polarssl_static_target}
+			DESTINATION ${LIB_INSTALL_DIR}
+			PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+endif()
 
-target_link_libraries(polarssl ${libs})
+if(USE_SHARED_POLARSSL_LIBRARY)
+	add_library(polarssl SHARED ${src})
+	set_target_properties(polarssl PROPERTIES VERSION 1.2.10 SOVERSION 3)
 
-install(TARGETS polarssl
-        DESTINATION ${LIB_INSTALL_DIR}
-        PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+	target_link_libraries(polarssl ${libs})
+
+	if(ZLIB_FOUND)
+		target_link_libraries(polarssl ${ZLIB_LIBRARIES})
+	endif(ZLIB_FOUND)
+
+	install(TARGETS polarssl
+			DESTINATION ${LIB_INSTALL_DIR}
+			PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
+endif(USE_SHARED_POLARSSL_LIBRARY)