Moxa UC-7101-LX Руководство по программной части онлайн [46/46] 170791

Moxa UC-7101-LX Руководство по программной части онлайн [46/46] 170791
C
C
Appendix C FAQ
FAQ 1 Why am I only able to use vfork ( ),and cannot use fork ( )?
Answer 1 μClinux only supports vfork ( ). It does not support fork ( ). Note that when using
vfork ( ), the parent process will hang until the child process calls an exec group API,
or exits.
FAQ 2 When using a pthread group API, why can I not use SIGUSR1 and SIGUSR2?
Answer 2 We cannot use the SIGUSR1 and SIGUSR2 signals since a pthread group API uses
SIGUSR1 and SIGUSR2 to do a pthread control suspend, restart exit function. You
will get the same result if you link the pthread. This means that you cannot use
-1pthread to add an option to the linker.
FAQ 3 What is the correct format for linking to an API?
Answer 3 arm-elf-gcc W1, -elf2flt
(In this example, the API converts elf format to flat format.)

Содержание

Похожие устройства