While compiling cygwin with gcc version 7.4.0 (GCC) this error is shown: Making all in reent /d/newlib-cygwin/newlib/libc/reent/execr.c: In function ‘_wait_r’: /d/newlib-cygwin/newlib/libc/reent/execr.c:120:14: warning: implicit declaration of function ‘_wait’; did you mean ‘wait’? [-Wimplicit-function-declaration] if ((ret = _wait (status)) == -1 && errno != 0) ^~~~~ wait
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