+ # Adjust warnings
+ add_definitions (-Wall)
+ # XXX: it's safer to use ssize_t everywhere instead of disabling warning
+ add_definitions (-Wno-sign-compare) # comparison between signed and unsigned integer expressions
+
+ # Use GDB extensions if available
+ if (CMAKE_COMPILER_IS_GNUC)
+ set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -ggdb -O0")
+ set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -ggdb")
+ endif ()
+ if (CMAKE_COMPILER_IS_GNUCXX)
+ set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -ggdb -O0")
+ set (CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -ggdb")
+ endif ()
+
+ # Be nice to Eclipse
+ add_definitions (-fmessage-length=0)
+endif ()
+
+if (MINGW)
+ # Avoid depending on MinGW runtime DLLs
+ check_cxx_compiler_flag (-static-libgcc HAVE_STATIC_LIBGCC_FLAG)
+ if (HAVE_STATIC_LIBGCC_FLAG)
+ set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc")
+ set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -static-libgcc")
+ set (CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -static-libgcc")
+ endif ()
+ check_cxx_compiler_flag (-static-libstdc++ HAVE_STATIC_LIBSTDCXX_FLAG)
+ if (HAVE_STATIC_LIBSTDCXX_FLAG)
+ set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libstdc++")
+ set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -static-libstdc++")
+ set (CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -static-libstdc++")
+ endif ()
+endif ()
+
+
+# Put all executables into the same top level build directory, regardless of
+# which subdirectory they are declared
+set (CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+
+
+##############################################################################
+# Bundled dependencies
+#
+# We always use the bundled zlib, libpng, and snappy sources:
+# - on Windows to make it easy to deploy the wrappers DLLs
+# - on unices to prevent symbol collisions when tracing applications that link
+# against other versions of these libraries
+
+set (ZLIB_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/zlib)
+set (ZLIB_LIBRARIES z_bundled)
+add_subdirectory (thirdparty/zlib EXCLUDE_FROM_ALL)
+
+include_directories (${ZLIB_INCLUDE_DIRS})
+
+set (SNAPPY_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/snappy)
+set (SNAPPY_LIBRARIES snappy_bundled)
+add_subdirectory (thirdparty/snappy EXCLUDE_FROM_ALL)
+
+include_directories (${SNAPPY_INCLUDE_DIRS})
+
+set (PNG_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/libpng)
+set (PNG_DEFINITIONS "")
+set (PNG_LIBRARIES png_bundled)
+
+add_subdirectory (thirdparty/libpng EXCLUDE_FROM_ALL)
+
+if (MSVC)
+ add_subdirectory (thirdparty/getopt EXCLUDE_FROM_ALL)
+ include_directories (${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/getopt)
+ set (GETOPT_LIBRARIES getopt_bundled)
+endif ()