Cygwin: use relative paths where needed

src/drivers/px4io/CMakeLists.txt

@@ -43,8 +43,6 @@ px4_add_module(
 		platforms__common
 	)
 
-include(cygwin_cygpath)
-
 # include the px4io binary in ROMFS
 message(STATUS "Building and including ${config_io_board}")
 
@@ -63,14 +61,12 @@ add_custom_command(OUTPUT ${fw_io_exe}
 	USES_TERMINAL
 	)
 
-# only in the cygwin environment: convert paths for
-# binary in and output to mixed windows paths (C:/...)
-CYGPATH(fw_io_exe fw_io_exe_cyg)
-CYGPATH(fw_io_bin fw_io_bin_cyg)
+file(RELATIVE_PATH fw_io_exe_relative ${CMAKE_CURRENT_BINARY_DIR} ${fw_io_exe})
+file(RELATIVE_PATH fw_io_bin_relative ${CMAKE_CURRENT_BINARY_DIR} ${fw_io_bin})
 
 add_custom_command(OUTPUT ${fw_io_bin}
 	COMMAND mkdir -p ${PX4_BINARY_DIR}/ROMFS/${config_romfs_root}/extras/
-	COMMAND ${OBJCOPY} -O binary ${fw_io_exe_cyg} ${fw_io_bin_cyg}
+	COMMAND ${OBJCOPY} -O binary ${fw_io_exe_relative} ${fw_io_bin_relative}
 	DEPENDS ${fw_io_exe}
 	COMMENT "Copying ${config_io_board} to ROMFS extras"
 	)

src/modules/mavlink/mavlink_shell.cpp

@@ -54,7 +54,6 @@
 #include <asm/socket.h>
 #endif
 
-
 MavlinkShell::MavlinkShell()
 {
 }