declare alloca in stdlib.h when _GNU_SOURCE is defined

[musl] / include / unistd.h

diff --git a/include/unistd.h b/include/unistd.h
index a64d99b..35cfda8 100644 (file)
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -147,6 +147,7 @@ int getdtablesize(void);
 #ifdef _GNU_SOURCE
 int brk(void *);
 void *sbrk(intptr_t);
+pid_t forkall(void);
 pid_t vfork(void);
 int vhangup(void);
 int chroot(const char *);