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Merge 9265eb181b into a6c57dc6f1

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This commit is contained in:
Corey Richardson 2014-10-07 17:56:47 +00:00
commit f55e7bdd77
2 changed files with 44 additions and 0 deletions
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37
CMakeLists.txt
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@ -11,6 +11,7 @@ set(GLFW_VERSION_FULL "${GLFW_VERSION}.${GLFW_VERSION_PATCH}${GLFW_VERSION_EXTRA
set(LIB_SUFFIX "" CACHE STRING "Takes an empty string or 64. Directory where lib will be installed: lib or lib64")
option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
option(GLFW_FORCE_INSECURE "Don't build with -fPIC on UNIX, or ASLR/DEP support on Windows. On Windows, a single insecure DLL will disable security for the entire executable. Use this lightly." OFF)
option(GLFW_BUILD_EXAMPLES "Build the GLFW example programs" ON)
option(GLFW_BUILD_TESTS "Build the GLFW test programs" ON)
option(GLFW_BUILD_DOCS "Build the GLFW documentation" ON)
@ -22,6 +23,42 @@ if (WIN32)
option(GLFW_USE_OPTIMUS_HPG "Force use of high-performance GPU on Optimus systems" OFF)
endif()
if (UNIX AND NOT GLFW_FORCE_INSECURE)
set(CMAKE_C_FLAGS "-fPIC ${CMAKE_C_FLAGS}")
elseif(MINGW AND NOT GLFW_FORCE_INSECURE)
include(CheckCCompilerFlag)
# These default to on in MSVC, when available, but not with MinGW.
# Only needed for DLLs.
# Vista+
set(CMAKE_REQUIRED_FLAGS "-Wl,--nxcompat")
check_c_compiler_flag("" _DEP_AVAIL)
# XP SP2+
set(CMAKE_REQUIRED_FLAGS "-Wl,--dynamicbase")
check_c_compiler_flag("" _ASLR_AVAIL)
# 64-bit ASLR
set(CMAKE_REQUIRED_FLAGS "-Wl,--high-entropy-va")
check_c_compiler_flag("" _64ASLR_AVAIL)
if(_DEP_AVAIL)
set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--nxcompat ${CMAKE_SHARED_LINKER_FLAGS}")
endif()
if(_ASLR_AVAIL)
set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--dynamicbase ${CMAKE_SHARED_LINKER_FLAGS}")
endif()
if(_64ASLR_AVAIL)
set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--high-entropy-va ${CMAKE_SHARED_LINKER_FLAGS}")
endif()
elseif(MSVC AND GLFW_FORCE_INSECURE)
# HIGHENTROPYVA will be NO if DYNAMICBASE is.
set(CMAKE_SHARED_LINKER_FLAGS "/DYNAMICBASE:NO /NXCOMPAT:NO ${CMAKE_SHARED_LINKER_FLAGS}")
endif()
if (APPLE)
option(GLFW_BUILD_UNIVERSAL "Build GLFW as a Universal Binary" OFF)
option(GLFW_USE_CHDIR "Make glfwInit chdir to Contents/Resources" ON)

7
docs/compile.dox
View File

@ -190,6 +190,13 @@ library is used, or if set to `glesv2` the OpenGL ES 2.0 library is used. The
selected library and its header files must be present on the system for this to
work.
`GLFW_FORCE_INSECURE` will disable ASLR and, on Windows, DEP. On non-Windows
systems, this just means not compiling with `-fPIC`. On 32-bit systems,
position independant code has a performance penalty, and might be reasonably
disabled. On 64-bit systems, there is no penalty. On Windows, disabling
ASLR/DEP for any DLL linked in an executable to be unable to use ASLR/DEP,
which can cause security issues. Use this lightly.
`GLFW_BUILD_EXAMPLES` determines whether the GLFW examples are built
along with the library.