Extend "static" build option
Try to link as much as possible statically in an effort to produce
binaries that can be run everywhere.
diff --git a/BUILDING.txt b/BUILDING.txt
index 71d26b6..8f686cc 100644
--- a/BUILDING.txt
+++ b/BUILDING.txt
@@ -252,16 +252,21 @@
Add "-DCMAKE_BUILD_TYPE=Debug" to the CMake command line.
-Self-Contained GCC Build
-------------------------
+Portable (semi-static) Build
+----------------------------
-If TigerVNC is built using GCC (including MinGW), then it may depend on the
-libgcc or libstdc++ dynamic libraries. To eliminate this dependency, add
+TigerVNC can under favourble circumstances be built in a way that allows
+the resulting binaries to run on any system without having to also install
+all the dynamic libraries it depends on. Enable this mode by adding:
-DBUILD_STATIC=1
to the CMake command line.
+Note that the method used to achieve this is very fragile and it may be
+necessary to tweak cmake/StaticBuild.cmake to make things work on your
+specific system.
+
=====================
Building Java Support
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5e600a2..1dcfd9e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,49 +89,6 @@
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(CMAKE_SIZEOF_VOID_P MATCHES 8)
- 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)
- if(MINGW)
- execute_process(COMMAND ${CMAKE_COMMAND} -E copy
- ${LIBSTDCPLUSPLUS} ${CMAKE_BINARY_DIR}/staticlib/libstdc++.a)
- else()
- execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink
- ${LIBSTDCPLUSPLUS} ${CMAKE_BINARY_DIR}/staticlib/libstdc++.a)
- endif()
- set(CMAKE_EXE_LINKER_FLAGS
- "${CMAKE_EXE_LINKER_FLAGS} -L${CMAKE_BINARY_DIR}/staticlib")
- set(CMAKE_SHARED_LINKER_FLAGS
- "${CMAKE_SHARED_LINKER_FLAGS} -L${CMAKE_BINARY_DIR}/staticlib")
- else()
- message(WARNING Cannot find static libstdc++. TigerVNC will depend on dynamic libstdc++.)
- endif()
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -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)
@@ -373,6 +330,8 @@
add_definitions(-DHAVE_CONFIG_H)
include_directories(${CMAKE_BINARY_DIR})
+include(cmake/StaticBuild.cmake)
+
add_subdirectory(common)
if(WIN32)
diff --git a/cmake/StaticBuild.cmake b/cmake/StaticBuild.cmake
new file mode 100644
index 0000000..4ef2905
--- /dev/null
+++ b/cmake/StaticBuild.cmake
@@ -0,0 +1,96 @@
+#
+# Best-effort magic that tries to produce semi-static binaries
+# (i.e. only depends on "safe" libraries like libc and libX11)
+#
+# Note that this often fails as there is no way to automatically
+# determine the dependencies of the libraries we depend on, and
+# a lot of details change with each different build environment.
+#
+
+option(BUILD_STATIC
+ "Link statically against most libraries, if possible" ON)
+
+if(BUILD_STATIC)
+ message(STATUS "Attempting to link static binaries...")
+
+ set(JPEG_LIBRARIES "-Wl,-Bstatic -ljpeg -Wl,-Bdynamic")
+
+ if(WIN32 AND NOT USE_INCLUDED_ZLIB)
+ set(ZLIB_LIBRARIES "-Wl,-Bstatic -lz -Wl,-Bdynamic")
+ endif()
+
+ # gettext is included in libc on many unix systems
+ if(NOT LIBC_HAS_DGETTEXT)
+ set(GETTEXT_LIBRARIES "-Wl,-Bstatic -lintl -liconv -Wl,-Bdynamic")
+ endif()
+
+ if(GNUTLS_FOUND)
+ # GnuTLS has historically had different crypto backends
+ FIND_LIBRARY(GCRYPT_LIBRARY NAMES gcrypt libgcrypt
+ HINTS ${PC_GNUTLS_LIBDIR} ${PC_GNUTLS_LIBRARY_DIRS})
+ FIND_LIBRARY(NETTLE_LIBRARY NAMES nettle libnettle
+ HINTS ${PC_GNUTLS_LIBDIR} ${PC_GNUTLS_LIBRARY_DIRS})
+
+ set(GNUTLS_LIBRARIES "-Wl,-Bstatic -lgnutls -ltasn1")
+
+ if(NETTLE_LIBRARY)
+ set(GNUTLS_LIBRARIES "${GNUTLS_LIBRARIES} -lnettle -lhogweed -lgmp")
+ endif()
+ if(GCRYPT_LIBRARY)
+ set(GNUTLS_LIBRARIES "${GNUTLS_LIBRARIES} -lgcrypt -lgpg-error")
+ endif()
+
+ set(GNUTLS_LIBRARIES "${GNUTLS_LIBRARIES} -Wl,-Bdynamic")
+
+ # nanosleep() lives here on Solaris
+ if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+ set(GNUTLS_LIBRARIES ${GNUTLS_LIBRARIES} -lrt)
+ endif()
+ endif()
+
+ if(FLTK_FOUND)
+ set(FLTK_LIBRARIES "-Wl,-Bstatic -lfltk_images -lpng -ljpeg -lfltk -Wl,-Bdynamic")
+
+ if(WIN32)
+ set(FLTK_LIBRARIES ${FLTK_LIBRARIES} comctl32)
+ elseif(APPLE)
+ set(FLTK_LIBRARIES ${FLTK_LIBRARIES} "-framework Cocoa")
+ else()
+ set(FLTK_LIBRARIES ${FLTK_LIBRARIES} m)
+ endif()
+
+ if(X11_FOUND AND NOT APPLE)
+ if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+ set(FLTK_LIBRARIES ${FLTK_LIBRARIES} ${X11_Xcursor_LIB} ${X11_Xfixes_LIB} "-Wl,-Bstatic -lXft -Wl,-Bdynamic" fontconfig Xext -R/usr/sfw/lib)
+ else()
+ set(FLTK_LIBRARIES ${FLTK_LIBRARIES} "-Wl,-Bstatic -lXcursor -lXfixes -lXft -lfontconfig -lexpat -lfreetype -lbz2 -lXrender -lXext -lXinerama -Wl,-Bdynamic")
+ endif()
+
+ set(FLTK_LIBRARIES ${FLTK_LIBRARIES} X11)
+ endif()
+ endif()
+
+ # X11 libraries change constantly on Linux systems so we have to link
+ # them statically, even libXext. libX11 is somewhat stable, although
+ # even it has had an ABI change once or twice.
+ if(X11_FOUND AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+ set(X11_LIBRARIES "-Wl,-Bstatic -lXext -Wl,-Bdynamic" X11)
+ if(X11_XTest_LIB)
+ set(X11_XTest_LIB "-Wl,-Bstatic -lXtst -Wl,-Bdynamic")
+ endif()
+ if(X11_Xdamage_LIB)
+ set(X11_Xdamage_LIB "-Wl,-Bstatic -lXdamage -Wl,-Bdynamic")
+ endif()
+ endif()
+
+ # This ensures that we don't depend on libstdc++ or libgcc_s
+ set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -nodefaultlibs")
+ set(STATIC_BASE_LIBRARIES "-Wl,-Bstatic -lstdc++ -Wl,-Bdynamic")
+ if(WIN32)
+ set(STATIC_BASE_LIBRARIES "${STATIC_BASE_LIBRARIES} -lmingw32 -lmoldname -lmingwex -lgcc -lgcc_eh -lmsvcrt -lkernel32")
+ else()
+ set(STATIC_BASE_LIBRARIES "${STATIC_BASE_LIBRARIES} -lgcc -lgcc_eh -lc")
+ endif()
+ set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} ${STATIC_BASE_LIBRARIES}")
+
+endif()