ARM: Disable compat mcount code when unneeded.

1 files changed, 42 insertions, 0 deletions

diff --git a/sysdeps/generic/gcc-compat.h b/sysdeps/generic/gcc-compat.h
new file mode 100644
index 0000000000..ac4fa1e95b
--- /dev/null
+++ b/sysdeps/generic/gcc-compat.h
@@ -0,0 +1,42 @@
+/* Macros for checking required GCC compatibility.  Generic version.
+   Copyright (C) 2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* This is the base file.  More-specific sysdeps/.../gcc-compat.h files
+   can define GCC_COMPAT_VERSION and then #include_next this file.  */
+
+#ifndef _GENERIC_GCC_COMPAT_H
+#define _GENERIC_GCC_COMPAT_H 1
+
+/* This is the macro that gets used in #if tests in code: true iff
+   the library we build must be compatible with user code built by
+   GCC version MAJOR.MINOR.  */
+#define GCC_COMPAT(major, minor)        \
+  (GCC_COMPAT_VERSION <= GCC_VERSION (major, minor))
+
+/* This is how we compose an integer from major and minor version
+   numbers, for comparison.  */
+#define GCC_VERSION(major, minor)       \
+  (((major) << 16) + (minor))
+
+#ifndef GCC_COMPAT_VERSION
+/* GCC 2.7.2 was current at the time of the glibc-2.0 release.
+   We assume nothing before that ever mattered.  */
+# define GCC_COMPAT_VERSION     GCC_VERSION (2, 7)
+#endif
+
+#endif