native: build zephyr.exe for posix arch

To indicate the generated binary is executable on the host, add .exe
extension to the generated ELF file.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

CMakeLists.txt

@@ -760,6 +760,7 @@ list_append_ifdef(
   post_build_commands
   COMMAND ${CMAKE_OBJCOPY} -S -Obinary -R .comment -R COMMON -R .eh_frame  ${KERNEL_ELF_NAME}    ${KERNEL_BIN_NAME}
   )
+
 list_append_ifdef(
   CONFIG_BUILD_OUTPUT_S19
   post_build_commands
@@ -784,6 +785,12 @@ list_append_ifdef(
   COMMAND ${CMAKE_STRIP}   --strip-all ${KERNEL_ELF_NAME} -o ${KERNEL_STRIP_NAME}
   )
 
+list_append_ifdef(
+  CONFIG_BUILD_OUTPUT_EXE
+  post_build_commands
+  COMMAND ${CMAKE_COMMAND} -E rename ${KERNEL_ELF_NAME}    ${KERNEL_EXE_NAME}
+  )
+
 add_custom_command(
   TARGET ${logical_target_for_zephyr_elf}
   POST_BUILD

cmake/app/boilerplate.cmake

@@ -237,6 +237,7 @@ set(KERNEL_HEX_NAME   ${KERNEL_NAME}.hex)
 set(KERNEL_MAP_NAME   ${KERNEL_NAME}.map)
 set(KERNEL_LST_NAME   ${KERNEL_NAME}.lst)
 set(KERNEL_S19_NAME   ${KERNEL_NAME}.s19)
+set(KERNEL_EXE_NAME   ${KERNEL_NAME}.exe)
 set(KERNEL_STAT_NAME  ${KERNEL_NAME}.stat)
 set(KERNEL_STRIP_NAME ${KERNEL_NAME}.strip)
 

cmake/emu/native.cmake

@@ -1,6 +1,6 @@
 add_custom_target(run
   COMMAND
-  ${APPLICATION_BINARY_DIR}/zephyr/${KERNEL_ELF_NAME}
+  ${APPLICATION_BINARY_DIR}/zephyr/${KERNEL_EXE_NAME}
   WORKING_DIRECTORY ${APPLICATION_BINARY_DIR}
   USES_TERMINAL
   )

misc/Kconfig

@@ -197,6 +197,13 @@ config BUILD_OUTPUT_BIN
 	  Build a binary in BIN format. This will build a zephyr.bin file need
 	  by some platforms.
 
+config BUILD_OUTPUT_EXE
+	bool "Build a binary in ELF format with .exe extension"
+	default n
+	help
+	  Build a binary in ELF format that can run in the host system. This
+	  will build a zephyr.exe file.
+
 config BUILD_OUTPUT_S19
 	bool "Build a binary in S19 format"
 	default n