#405 Problem with GLIBC > 2.34

[Adrian Moran]

In file src/vos/posix/vos_thread.c the following initialization is performed:

const size_t    cDefaultStackSize   = 4u * PTHREAD_STACK_MIN;

In glibc versions over 2.34, PTHREAD_STACK_MIN macro can not be considered as constant, since it is defined as follows:

#   define PTHREAD_STACK_MIN __sysconf (__SC_THREAD_STACK_MIN_VALUE)

In theory, sysconf can return -1, so the compiler claims that initialization is not constant:

src/vos/posix/vos_thread.c:81:39: error: initializer element is not constant
   81 | const size_t    cDefaultStackSize   = 4u * PTHREAD_STACK_MIN;

A temporal fix is to change cDefaultStackSize initialization with a define like the following:

#define cDefaultStackSize (4u * PTHREAD_STACK_MIN)

No patch is provided since it would be needed to analize implications of this workaround.

Regards,
Adrian

[Chris Wetzler]

... yes, already saw same here with Ubuntu 22.04 and gcc-11

[Armin-Hagen Weiss]

Patched like proposed. Additional check of cDefaultStackSize added.

[Armin-Hagen Weiss]

Definition of the default stack size changed fom constand to #define and additional check added.