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py/mpconfig.h: Add note that using computed gotos in VM is not C99.

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Damien George 2017-09-18 23:53:33 +10:00
parent fdb2aa81b7
commit 44f0a4d1e7
1 changed files with 2 additions and 0 deletions
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py/mpconfig.h
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@ -383,6 +383,8 @@
// Whether to use computed gotos in the VM, or a switch // Whether to use computed gotos in the VM, or a switch
// Computed gotos are roughly 10% faster, and increase VM code size by a little // Computed gotos are roughly 10% faster, and increase VM code size by a little
// Note: enabling this will use the gcc-specific extensions of ranged designated
// initialisers and addresses of labels, which are not part of the C99 standard.
#ifndef MICROPY_OPT_COMPUTED_GOTO #ifndef MICROPY_OPT_COMPUTED_GOTO
#define MICROPY_OPT_COMPUTED_GOTO (0) #define MICROPY_OPT_COMPUTED_GOTO (0)
#endif #endif