[libc][stdio] Use proxy headers of stdio.h in src and test folders.

libc/hdr/CMakeLists.txt

@@ -78,10 +78,14 @@ add_proxy_header_library(
     libc.include.signal
 )
 
+add_header_library(stdio_overlay HDRS stdio_overlay.h)
+
 add_proxy_header_library(
   stdio_macros
   HDRS
     stdio_macros.h
+  DEPENDS
+    .stdio_overlay
   FULL_BUILD_DEPENDS
     libc.include.stdio
     libc.include.llvm-libc-macros.stdio_macros

libc/hdr/stdio_macros.h

@@ -16,7 +16,7 @@
 
 #else // Overlay mode
 
-#include <stdio.h>
+#include "stdio_overlay.h"
 
 #endif // LLVM_LIBC_FULL_BUILD
 

libc/hdr/stdio_overlay.h

@@ -0,0 +1,47 @@
+//===-- Including stdio.h in overlay mode ---------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_HDR_STDIO_OVERLAY_H
+#define LLVM_LIBC_HDR_STDIO_OVERLAY_H
+
+#ifdef LIBC_FULL_BUILD
+#error "This header should only be included in overlay mode"
+#endif
+
+// Overlay mode
+
+// glibc <stdio.h> header might provide extern inline definitions for few
+// functions, causing external alias errors.  They are guarded by
+// `__USE_EXTERN_INLINES` macro.  We temporarily disable `__USE_EXTERN_INLINES`
+// macro by defining `__NO_INLINE__` before including <stdio.h>.
+// And the same with `__USE_FORTIFY_LEVEL`, which will be temporarily disabled
+// with `_FORTIFY_SOURCE`.
+
+#ifdef _FORTIFY_SOURCE
+#define LIBC_OLD_FORTIFY_SOURCE _FORTIFY_SOURCE
+#undef _FORTIFY_SOURCE
+#endif
+
+#ifndef __NO_INLINE__
+#define __NO_INLINE__ 1
+#define LIBC_SET_NO_INLINE
+#endif
+
+#include <stdio.h>
+
+#ifdef LIBC_OLD_FORTIFY_SOURCE
+#define _FORTIFY_SOURCE LIBC_OLD_FORTIFY_SOURCE
+#undef LIBC_OLD_FORTIFY_SOURCE
+#endif
+
+#ifdef LIBC_SET_NO_INLINE
+#undef __NO_INLINE__
+#undef LIBC_SET_NO_INLINE
+#endif
+
+#endif // LLVM_LIBC_HDR_STDIO_OVERLAY_H

libc/hdr/types/CMakeLists.txt

@@ -140,6 +140,8 @@ add_proxy_header_library(
   FILE
   HDRS
     FILE.h
+  DEPENDS
+    libc.hdr.stdio_overlay
   FULL_BUILD_DEPENDS
     libc.include.llvm-libc-types.FILE
     libc.include.stdio
@@ -149,6 +151,8 @@ add_proxy_header_library(
   off_t
   HDRS
     off_t.h
+  DEPENDS
+    libc.hdr.stdio_overlay
   FULL_BUILD_DEPENDS
     libc.include.llvm-libc-types.off_t
     libc.include.stdio
@@ -158,6 +162,8 @@ add_proxy_header_library(
   cookie_io_functions_t
   HDRS
     cookie_io_functions_t.h
+  DEPENDS
+    libc.hdr.stdio_overlay
   FULL_BUILD_DEPENDS
     libc.include.llvm-libc-types.cookie_io_functions_t
     libc.include.stdio

libc/hdr/types/FILE.h

@@ -15,7 +15,7 @@
 
 #else // Overlay mode
 
-#include <stdio.h>
+#include "hdr/stdio_overlay.h"
 
 #endif // LLVM_LIBC_FULL_BUILD
 

libc/hdr/types/cookie_io_functions_t.h

@@ -15,7 +15,7 @@
 
 #else // Overlay mode
 
-#include <stdio.h>
+#include "hdr/stdio_overlay.h"
 
 #endif // LLVM_LIBC_FULL_BUILD
 

libc/hdr/types/off_t.h

@@ -15,7 +15,7 @@
 
 #else // Overlay mode
 
-#include <stdio.h>
+#include "hdr/stdio_overlay.h"
 
 #endif // LLVM_LIBC_FULL_BUILD
 

libc/include/llvm-libc-macros/stdio-macros.h

@@ -9,6 +9,30 @@
 #ifndef LLVM_LIBC_MACROS_STDIO_MACROS_H
 #define LLVM_LIBC_MACROS_STDIO_MACROS_H
 
+#include "../llvm-libc-types/FILE.h"
+
+#ifdef __cplusplus
+extern "C" FILE *stdin;
+extern "C" FILE *stdout;
+extern "C" FILE *stderr;
+#else
+extern FILE *stdin;
+extern FILE *stdout;
+extern FILE *stderr;
+#endif
+
+#ifndef stdin
+#define stdin stdin
+#endif
+
+#ifndef stdout
+#define stdout stdout
+#endif
+
+#ifndef stderr
+#define stderr stderr
+#endif
+
 #ifndef EOF
 #define EOF (-1)
 #endif
@@ -19,4 +43,16 @@
 #define _IOLBF 1
 #define _IOFBF 0
 
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+#ifndef SEEK_CUR
+#define SEEK_CUR 1
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
 #endif // LLVM_LIBC_MACROS_STDIO_MACROS_H

libc/src/__support/File/linux/CMakeLists.txt

@@ -8,7 +8,6 @@ add_object_library(
     lseekImpl.h
   DEPENDS
     libc.include.fcntl
-    libc.include.stdio
     libc.include.sys_syscall
     libc.include.sys_stat
     libc.src.__support.CPP.new

libc/src/stdio/asprintf.h

@@ -10,8 +10,6 @@
 #define LLVM_LIBC_SRC_STDIO_ASPRINTF_H
 
 #include "src/__support/macros/config.h"
-#include <stdarg.h>
-#include <stdio.h>
 
 namespace LIBC_NAMESPACE {
 

libc/src/stdio/gpu/CMakeLists.txt

@@ -1,9 +1,40 @@
+add_entrypoint_object(
+  stdin
+  SRCS
+    stdin.cpp
+  HDRS
+    ../stdin.h
+  DEPENDS
+    libc.hdr.types.FILE
+)
+
+add_entrypoint_object(
+  stdout
+  SRCS
+    stdout.cpp
+  HDRS
+    ../stdout.h
+  DEPENDS
+    libc.hdr.types.FILE
+)
+
+add_entrypoint_object(
+  stderr
+  SRCS
+    stderr.cpp
+  HDRS
+    ../stderr.h
+  DEPENDS
+    libc.hdr.types.FILE
+)
+
 add_header_library(
   gpu_file
   HDRS
     file.h
   DEPENDS
     libc.hdr.types.FILE
+    libc.hdr.stdio_macros
     libc.src.__support.RPC.rpc_client
     libc.src.__support.common
     .stdin
@@ -123,7 +154,6 @@ add_entrypoint_object(
     ../puts.h
   DEPENDS
     libc.hdr.types.FILE
-    libc.include.stdio # needed for stdin
     .gpu_file
 )
 
@@ -168,7 +198,6 @@ add_entrypoint_object(
     ../putc.h
   DEPENDS
     libc.hdr.types.FILE
-    libc.include.stdio # needed for stdin
     .gpu_file
 )
 
@@ -180,7 +209,6 @@ add_entrypoint_object(
     ../putchar.h
   DEPENDS
     libc.hdr.types.FILE
-    libc.include.stdio # needed for stdin
     .gpu_file
 )
 
@@ -203,7 +231,6 @@ add_entrypoint_object(
     ../getc.h
   DEPENDS
     libc.hdr.types.FILE
-    libc.include.stdio # needed for stdin
     .gpu_file
 )
 
@@ -215,7 +242,6 @@ add_entrypoint_object(
     ../getchar.h
   DEPENDS
     libc.hdr.types.FILE
-    libc.include.stdio # needed for stdin
     .gpu_file
 )
 
@@ -304,33 +330,3 @@ add_entrypoint_object(
     libc.hdr.types.FILE
     .gpu_file
 )
-
-add_entrypoint_object(
-  stdin
-  SRCS
-    stdin.cpp
-  HDRS
-    ../stdin.h
-  DEPENDS
-    libc.hdr.types.FILE
-)
-
-add_entrypoint_object(
-  stdout
-  SRCS
-    stdout.cpp
-  HDRS
-    ../stdout.h
-  DEPENDS
-    libc.hdr.types.FILE
-)
-
-add_entrypoint_object(
-  stderr
-  SRCS
-    stderr.cpp
-  HDRS
-    ../stderr.h
-  DEPENDS
-    libc.hdr.types.FILE
-)

libc/src/stdio/gpu/file.h

@@ -10,10 +10,9 @@
 #include "src/__support/macros/config.h"
 #include "src/string/string_utils.h"
 
+#include "hdr/stdio_macros.h" // For stdin/out/err
 #include "hdr/types/FILE.h"
 
-#include <stdio.h> //needed for stdin/out/err
-
 namespace LIBC_NAMESPACE_DECL {
 namespace file {
 

libc/src/stdio/gpu/fprintf.cpp

@@ -8,12 +8,13 @@
 
 #include "src/stdio/fprintf.h"
 
+#include "hdr/types/FILE.h"
 #include "src/__support/CPP/string_view.h"
 #include "src/__support/arg_list.h"
 #include "src/errno/libc_errno.h"
 #include "src/stdio/gpu/vfprintf_utils.h"
 
-#include <stdio.h>
+#include <stdarg.h>
 
 namespace LIBC_NAMESPACE {
 

libc/src/stdio/gpu/getchar.cpp

@@ -10,10 +10,7 @@
 #include "file.h"
 #include "src/__support/macros/config.h"
 
-#include "hdr/stdio_macros.h" // for EOF.
-#include "hdr/types/FILE.h"
-
-#include <stdio.h> //needed for stdin
+#include "hdr/stdio_macros.h" // for EOF and stdin.
 
 namespace LIBC_NAMESPACE_DECL {
 

libc/src/stdio/gpu/printf.cpp

@@ -13,7 +13,7 @@
 #include "src/errno/libc_errno.h"
 #include "src/stdio/gpu/vfprintf_utils.h"
 
-#include <stdio.h>
+#include <stdarg.h>
 
 namespace LIBC_NAMESPACE {
 

libc/src/stdio/gpu/putchar.cpp

@@ -10,10 +10,7 @@
 #include "file.h"
 #include "src/__support/macros/config.h"
 
-#include "hdr/stdio_macros.h" // for EOF.
-#include "hdr/types/FILE.h"
-
-#include <stdio.h> //needed for stdout
+#include "hdr/stdio_macros.h" // for EOF and stdout.
 
 namespace LIBC_NAMESPACE_DECL {
 

libc/src/stdio/gpu/puts.cpp

@@ -12,10 +12,7 @@
 #include "src/errno/libc_errno.h"
 #include "src/stdio/gpu/file.h"
 
-#include "hdr/stdio_macros.h" // for EOF.
-#include "hdr/types/FILE.h"
-
-#include <stdio.h> //needed for stdout
+#include "hdr/stdio_macros.h" // for EOF and stdout.
 
 namespace LIBC_NAMESPACE_DECL {
 

libc/src/stdio/gpu/vfprintf.cpp

@@ -8,13 +8,12 @@
 
 #include "src/stdio/vfprintf.h"
 
+#include "hdr/types/FILE.h"
 #include "src/__support/CPP/string_view.h"
 #include "src/__support/arg_list.h"
 #include "src/errno/libc_errno.h"
 #include "src/stdio/gpu/vfprintf_utils.h"
 
-#include <stdio.h>
-
 namespace LIBC_NAMESPACE {
 
 LLVM_LIBC_FUNCTION(int, vfprintf,