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Altera_Forum's avatar
Altera_Forum
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20 years ago

Semaphore support

Hi, I'm currently trying to initialize a semaphore by making a call to sem_init(), but instead of returning a non-zero value and printing a error condition, Nios II reboots. struct sem_...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Hi Ken,

I think that might be the problem. However, I only get an "undefined reference to 'sem_init'" error from the linker when DEBUG=1 and it attempts to generate the .gdb file. When DEBUG=0, the linker does not report any errors or warnings when it generates the application.

What path do I need to follow within the kernel configuration menu to check and see if IPC support is turned on? The only choice in the menu options that I found that was related to semaphores is "General Setup --> POSIX message queues". Is that right?

I'll also take a look at those linux examples to make sure I'm initializing the semaphores correctly.

Thanks for your help.

UPDATE: (8/24/05):

I enabled the "General Setup -> POSIX message queues" from the kernel configuration menu, performed a new build, and downloaded the new vmlinux.bin file. However, the application still causes a Nios2 reboot as soon as sem_init() is called. Is there something else I'm missing?