From 883f2d69ef603fa3b33cd93dde29d5b4d6ca9231 Mon Sep 17 00:00:00 2001
From: DRC <dcommander@users.sourceforge.net>
Date: Thu, 28 Jul 2011 09:58:24 +0000
Subject: Add a BUILD_STATIC option which links statically against libgcc and
 libstdc++ (if applicable.)  Remove the corresponding code from build-xorg.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4608 3789f03b-4d11-0410-bbf8-ca57d06f2519
---
 CMakeLists.txt | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ef347056..e67feb4f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -107,6 +107,44 @@ else()
   message(STATUS "32-bit build")
 endif()
 
+# This ensures that we don't depend on libstdc++ or libgcc
+if(CMAKE_COMPILER_IS_GNUCXX AND NOT APPLE AND NOT CYGWIN)
+  option(BUILD_STATIC
+    "Link statically against libgcc and libstdc++, if possible" OFF)
+  if(BUILD_STATIC)
+    # For some reason, simply passing ${CMAKE_CXX_FLAGS} to the compiler in
+    # execute_process() doesn't work.  Grrr...
+    if(64BIT)
+      execute_process(COMMAND ${CMAKE_CXX_COMPILER} -m64
+        --print-file-name=libstdc++.a OUTPUT_VARIABLE LIBSTDCPLUSPLUS
+        RESULT_VARIABLE RESULT)
+    else()
+      execute_process(COMMAND ${CMAKE_CXX_COMPILER} -m32
+        --print-file-name=libstdc++.a OUTPUT_VARIABLE LIBSTDCPLUSPLUS
+        RESULT_VARIABLE RESULT)
+    endif()
+    string(REGEX REPLACE "\n" "" LIBSTDCPLUSPLUS ${LIBSTDCPLUSPLUS})
+    if(RESULT MATCHES 0 AND LIBSTDCPLUSPLUS)
+      message(STATUS "Linking with static libstdc++:\n   ${LIBSTDCPLUSPLUS}")
+      file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/staticlib)
+      execute_process(COMMAND ${CMAKE_COMMAND} -E remove
+        ${CMAKE_BINARY_DIR}/staticlib/libstdc++.a)
+      execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink
+        ${LIBSTDCPLUSPLUS} ${CMAKE_BINARY_DIR}/staticlib/libstdc++.a)
+      set(CMAKE_EXE_LINKER_FLAGS
+        "${CMAKE_EXE_LINKER_FLAGS} -L${CMAKE_BINARY_DIR}/staticlib")
+      set(CMAKE_SHARED_LINKER_FLAGS
+        "${CMAKE_SHARED_LINKER_FLAGS} -L${CMAKE_BINARY_DIR}/staticlib")
+    else()
+      message(WARNING Cannot find static libstdc++.  VirtualGL will depend on dynamic libstdc++.)
+    endif()
+    add_definitions(-static-libgcc)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc")
+    set(CMAKE_SHARED_LINKER_FLAGS
+      "${CMAKE_SHARED_LINKER_FLAGS} -static-libgcc")
+  endif()
+endif()
+
 # CMake doesn't properly support resource compilation with MinGW.  Boo!
 if(MINGW)
   if(NOT DEFINED RC)
-- 
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