https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108224
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
diff --git a/gcc/c-family/known-headers.cc b/gcc/c-family/known-headers.cc
index 9c256173b82..dd4c23e5923 100644
--- a/gcc/c-family/known-headers.cc
+++ b/gcc/c-family/known-headers.cc
@@ -171,6 +171,8 @@ get_stdlib_header_for_name (const char *name, enum stdlib
lib)
{"getenv", {"<stdlib.h>", "<cstdlib>"} },
{"malloc", {"<stdlib.h>", "<cstdlib>"} },
{"realloc", {"<stdlib.h>", "<cstdlib>"} },
+ {"rand", {"<stdlib.h>", "<cstdlib>"} },
+ {"srand", {"<stdlib.h>", "<cstdlib>"} },
/* <string.h> and <cstring>. */
{"memchr", {"<string.h>", "<cstring>"} },
Should be enough for both C and C++.
