compiler-rt: move all __GLIBC_PREREQ into own header file

Reviewers: eugenis

Subscribers: dberris, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D68177

llvm-svn: 373283

compiler-rt/lib/sanitizer_common/sanitizer_getauxval.h

@@ -17,15 +17,10 @@
 #define SANITIZER_GETAUXVAL_H
 
 #include "sanitizer_platform.h"
+#include "sanitizer_glibc_version.h"
 
 #if SANITIZER_LINUX || SANITIZER_FUCHSIA
 
-# include <features.h>
-
-# ifndef __GLIBC_PREREQ
-#  define __GLIBC_PREREQ(x, y) 0
-# endif
-
 # if __GLIBC_PREREQ(2, 16) || (SANITIZER_ANDROID && __ANDROID_API__ >= 21) || \
      SANITIZER_FUCHSIA
 #  define SANITIZER_USE_GETAUXVAL 1

compiler-rt/lib/sanitizer_common/sanitizer_glibc_version.h

@@ -0,0 +1,26 @@
+//===-- sanitizer_glibc_version.h -----------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of Sanitizer common code.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SANITIZER_GLIBC_VERSION_H
+#define SANITIZER_GLIBC_VERSION_H
+
+#include "sanitizer_platform.h"
+
+#if (SANITIZER_POSIX && !SANITIZER_MAC) || SANITIZER_FUCHSIA
+#include <features.h>
+#endif
+
+#ifndef __GLIBC_PREREQ
+#define __GLIBC_PREREQ(x, y) 0
+#endif
+
+#endif

compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp

@@ -23,6 +23,7 @@
 #include "sanitizer_flags.h"
 #include "sanitizer_freebsd.h"
 #include "sanitizer_getauxval.h"
+#include "sanitizer_glibc_version.h"
 #include "sanitizer_linux.h"
 #include "sanitizer_placement_new.h"
 #include "sanitizer_procmaps.h"
@@ -188,11 +189,7 @@ __attribute__((unused)) static bool GetLibcVersion(int *major, int *minor,
 static uptr g_tls_size;
 
 #ifdef __i386__
-# ifndef __GLIBC_PREREQ
-#  define CHECK_GET_TLS_STATIC_INFO_VERSION 1
-# else
-#  define CHECK_GET_TLS_STATIC_INFO_VERSION (!__GLIBC_PREREQ(2, 27))
-# endif
+# define CHECK_GET_TLS_STATIC_INFO_VERSION (!__GLIBC_PREREQ(2, 27))
 #else
 # define CHECK_GET_TLS_STATIC_INFO_VERSION 0
 #endif

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp

@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "sanitizer_platform.h"
+#include "sanitizer_glibc_version.h"
 
 #if SANITIZER_LINUX || SANITIZER_MAC
 // Tests in this file assume that off_t-dependent data structures match the
@@ -1005,10 +1006,6 @@ CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_len);
 CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_level);
 CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_type);
 
-#ifndef __GLIBC_PREREQ
-#define __GLIBC_PREREQ(x, y) 0
-#endif
-
 #if SANITIZER_LINUX && (__ANDROID_API__ >= 21 || __GLIBC_PREREQ (2, 14))
 CHECK_TYPE_SIZE(mmsghdr);
 CHECK_SIZE_AND_OFFSET(mmsghdr, msg_hdr);

compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h

@@ -19,12 +19,13 @@
 #include "sanitizer_internal_defs.h"
 #include "sanitizer_platform.h"
 
-# define GET_LINK_MAP_BY_DLOPEN_HANDLE(handle) ((link_map*)(handle))
-
-#ifndef __GLIBC_PREREQ
-#define __GLIBC_PREREQ(x, y) 0
+#if defined(__sparc__)
+// FIXME: This can't be included from tsan which does not support sparc yet.
+#include "sanitizer_glibc_version.h"
 #endif
 
+# define GET_LINK_MAP_BY_DLOPEN_HANDLE(handle) ((link_map*)(handle))
+
 namespace __sanitizer {
 extern unsigned struct_utsname_sz;
 extern unsigned struct_stat_sz;