diff --git a/CMakeLists.txt b/CMakeLists.txt index b52255f..bfd9c3d 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -110,6 +110,14 @@ if (MSVC) list(APPEND CMAKE_REQUIRED_FLAGS /wd4996) endif() +if (NOT DISABLE_STATIC_FPIC) + # Use '-fPIC'/'-fPIE' option. + # This will allow other libraries to statically link in libjson-c.a + # which in turn prevents crashes in downstream apps that may use + # a different JSON library with identical symbol names. + set(CMAKE_POSITION_INDEPENDENT_CODE ON) +endif() + check_include_file("fcntl.h" HAVE_FCNTL_H) check_include_file("inttypes.h" HAVE_INTTYPES_H) check_include_file(stdarg.h HAVE_STDARG_H) diff --git a/README.md b/README.md index 5cabd9d..3757a40 100644 --- a/README.md +++ b/README.md @@ -99,6 +99,7 @@ CMAKE_INSTALL_PREFIX | String | The install location. CMAKE_BUILD_TYPE | String | Defaults to "debug". BUILD_SHARED_LIBS | Bool | The default build generates a dynamic (dll/so) library. Set this to OFF to create a static library only. BUILD_STATIC_LIBS | Bool | The default build generates a static (lib/a) library. Set this to OFF to create a shared library only. +DISABLE_STATIC_FPIC | Bool | The default builds position independent code. Set this to OFF to create a shared library only. DISABLE_BSYMBOLIC | Bool | Disable use of -Bsymbolic-functions. DISABLE_THREAD_LOCAL_STORAGE | Bool | Disable use of Thread-Local Storage (HAVE___THREAD). DISABLE_WERROR | Bool | Disable use of -Werror.