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kernel: Switch main return type from void to int

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As both C and C++ standards require applications running under an OS to
return 'int', adapt that for Zephyr to align with those standard. This also
eliminates errors when building with clang when not using -ffreestanding,
and reduces the need for compiler flags to silence warnings for both clang
and gcc

Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Keith Packard 2023-02-08 21:20:55 -08:00 committed by Stephanos Ioannidis
parent 3a197934fc
commit fc076f5a1d
1 changed files with 0 additions and 6 deletions
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6
kernel/main_weak.c
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@ -21,16 +21,10 @@
#include <kernel_internal.h> #include <kernel_internal.h>
#ifdef CONFIG_CPP_MAIN
int __weak main(void) int __weak main(void)
#else
void __weak main(void)
#endif
{ {
/* NOP default main() if the application does not provide one. */ /* NOP default main() if the application does not provide one. */
arch_nop(); arch_nop();
#ifdef CONFIG_CPP_MAIN
return 0; return 0;
#endif
} }