1*bb722a7dSDimitry Andric //===-- Including stdlib.h in overlay mode --------------------------------===// 2*bb722a7dSDimitry Andric // 3*bb722a7dSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*bb722a7dSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*bb722a7dSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*bb722a7dSDimitry Andric // 7*bb722a7dSDimitry Andric //===----------------------------------------------------------------------===// 8*bb722a7dSDimitry Andric 9*bb722a7dSDimitry Andric #ifndef LLVM_LIBC_HDR_STDLIB_OVERLAY_H 10*bb722a7dSDimitry Andric #define LLVM_LIBC_HDR_STDLIB_OVERLAY_H 11*bb722a7dSDimitry Andric 12*bb722a7dSDimitry Andric #ifdef LIBC_FULL_BUILD 13*bb722a7dSDimitry Andric #error "This header should only be included in overlay mode" 14*bb722a7dSDimitry Andric #endif 15*bb722a7dSDimitry Andric 16*bb722a7dSDimitry Andric // Overlay mode 17*bb722a7dSDimitry Andric 18*bb722a7dSDimitry Andric // glibc <stdlib.h> header might provide extern inline definitions for few 19*bb722a7dSDimitry Andric // functions, causing external alias errors. They are guarded by 20*bb722a7dSDimitry Andric // `__USE_FORTIFY_LEVEL`, which will be temporarily disabled. 21*bb722a7dSDimitry Andric 22*bb722a7dSDimitry Andric #ifdef _FORTIFY_SOURCE 23*bb722a7dSDimitry Andric #define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE 24*bb722a7dSDimitry Andric #undef _FORTIFY_SOURCE 25*bb722a7dSDimitry Andric #endif 26*bb722a7dSDimitry Andric 27*bb722a7dSDimitry Andric #ifdef __USE_FORTIFY_LEVEL 28*bb722a7dSDimitry Andric #define LIBC_OLD_USE_FORTIFY_LEVEL __USE_FORTIFY_LEVEL 29*bb722a7dSDimitry Andric #undef __USE_FORTIFY_LEVEL 30*bb722a7dSDimitry Andric #define __USE_FORTIFY_LEVEL 0 31*bb722a7dSDimitry Andric #endif 32*bb722a7dSDimitry Andric 33*bb722a7dSDimitry Andric #include <stdlib.h> 34*bb722a7dSDimitry Andric 35*bb722a7dSDimitry Andric #ifdef LIBC_OLD_FORTIFY_SOURCE 36*bb722a7dSDimitry Andric #define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE 37*bb722a7dSDimitry Andric #undef LIBC_OLD_FORTIFY_SOURCE 38*bb722a7dSDimitry Andric #endif 39*bb722a7dSDimitry Andric 40*bb722a7dSDimitry Andric #ifdef LIBC_OLD_USE_FORTIFY_LEVEL 41*bb722a7dSDimitry Andric #undef __USE_FORTIFY_LEVEL 42*bb722a7dSDimitry Andric #define __USE_FORTIFY_LEVEL LIBC_OLD_USE_FORTIFY_LEVEL 43*bb722a7dSDimitry Andric #undef LIBC_OLD_USE_FORTIFY_LEVEL 44*bb722a7dSDimitry Andric #endif 45*bb722a7dSDimitry Andric 46*bb722a7dSDimitry Andric #endif 47