Unix port : make KO out of the box

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Bonjour,
make is KO with this error message :

CC mpthreadport.c mpthreadport.c:148:9: error: call to undeclared function 'pthread_cancel'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 148 | pthread_cancel(th->id); | ^ mpthreadport.c:148:9: note: did you mean 'pthread_once'?

Three times

comment IS workarround but why this error ?
NB : paste not keep indentation
Thank's for help

Termux on Android tablett arch64 with clang

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OK Android SDK issue.