X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=cmake%2Fcmake.d%2F04-build_options.cmake;h=18a1b176aac1dabd6265ab0f6bdd88052389814f;hb=e554c093bc7792d9d3a335372e972d9bfab42499;hp=899505f61187460df2f4fec3fc3b95d4d00f8dd7;hpb=5989f68a47567569a957b81ba64cbd8fef0bccc5;p=staging%2Fxdg-launcher.git

diff --git a/cmake/cmake.d/04-build_options.cmake b/cmake/cmake.d/04-build_options.cmake
index 899505f..18a1b17 100644
--- a/cmake/cmake.d/04-build_options.cmake
+++ b/cmake/cmake.d/04-build_options.cmake
@@ -33,26 +33,23 @@ if (gcc_minimal_version)
 	endif()
 endif(gcc_minimal_version)
 
-# Check Kernel minimal version
+# Check Kernel mandatory version, will fail the configuration if required version not matched.
+if (kernel_mandatory_version)
+	message (STATUS "${Cyan}-- Check kernel_mandatory_version (found kernel version ${KERNEL_VERSION})${ColourReset}")
+	if (KERNEL_VERSION VERSION_LESS ${kernel_mandatory_version})
+		message(FATAL_ERROR "${Red}**** FATAL: Require at least ${kernel_mandatory_version} please use a recent kernel or source your SDK environment then clean and reconfigure your CMake project.")
+	endif (KERNEL_VERSION VERSION_LESS ${kernel_mandatory_version})
+endif(kernel_mandatory_version)
+
+# Check Kernel minimal version just print a Warning about missing features
+# and set a definition to be used as preprocessor condition in code to disable
+# incompatibles features.
 if (kernel_minimal_version)
-	if(DEFINED ENV{SDKTARGETSYSROOT})
-		file(STRINGS $ENV{SDKTARGETSYSROOT}/usr/include/linux/version.h LINUX_VERSION_CODE_LINE REGEX "LINUX_VERSION_CODE")
-	elseif(DEFINED ENV{PKG_CONFIG_SYSROOT_DIR})
-		file(STRINGS $ENV{PKG_CONFIG_SYSROOT_DIR}/usr/include/linux/version.h LINUX_VERSION_CODE_LINE REGEX "LINUX_VERSION_CODE")
-	else()
-		file(STRINGS /usr/include/linux/version.h LINUX_VERSION_CODE_LINE REGEX "LINUX_VERSION_CODE")
-	endif()
-
-	string(REGEX MATCH "[0-9]+" LINUX_VERSION_CODE ${LINUX_VERSION_CODE_LINE})
-	math(EXPR a "${LINUX_VERSION_CODE} >> 16")
-	math(EXPR b "(${LINUX_VERSION_CODE} >> 8) & 255")
-	math(EXPR c "(${LINUX_VERSION_CODE} & 255)")
-
-	set(KERNEL_VERSION "${a}.${b}.${c}")
 	message (STATUS "${Cyan}-- Check kernel_minimal_version (found kernel version ${KERNEL_VERSION})${ColourReset}")
-
 	if (KERNEL_VERSION VERSION_LESS ${kernel_minimal_version})
-		message(FATAL_ERROR "${Red}**** FATAL: Require at least ${kernel_minimal_version} please use a recent kernel or source your SDK environment then clean and reconfigure your CMake project.")
+		message(WARNING "${Yellow}**** Warning: Some feature(s) require at least ${kernel_minimal_version}. Please use a recent kernel or source your SDK environment then clean and reconfigure your CMake project.${ColourReset}")
+	else (KERNEL_VERSION VERSION_LESS ${kernel_minimal_version})
+		add_definitions(-DKERNEL_MINIMAL_VERSION_OK)
 	endif (KERNEL_VERSION VERSION_LESS ${kernel_minimal_version})
 endif(kernel_minimal_version)