# Bug report ### Bug description: AIX build breaks because of the recent commit #109914 gcc -pthread -maix64 -c -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden -I./Include/internal -I./Include/internal/mimalloc -I. -I./Include -DPy_BUILD_CORE -o Objects/obmalloc.o Objects/obmalloc.c In file included from Objects/mimalloc/prim/prim.c:22, from Objects/mimalloc/static.c:37, from Objects/obmalloc.c:15: Objects/mimalloc/prim/unix/prim.c:55:12: fatal error: sys/syscall.h: No such file or directory 55 | #include <sys/syscall.h> | ^~~~~~~~~~~~~~~ compilation terminated. AIX don't have syscall.h. ### CPython versions tested on: CPython main branch ### Operating systems tested on: Other <!-- gh-linked-prs --> ### Linked PRs * gh-111593 <!-- /gh-linked-prs -->