GNU C Library master sources branch master updated. glibc-2.26.9000-1157-gd4c7e1d

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=d4c7e1d0fdd1b1ff97606f2368b6cdeb7c915734

commit d4c7e1d0fdd1b1ff97606f2368b6cdeb7c915734
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Jan 24 23:33:03 2018 +0000

    Add no-FPU ColdFire math_private.h.
    
    As with some other soft-float configurations, no-FPU ColdFire needs
    various fenv.h functions and glibc-internal macros overridden in
    math_private.h to avoid references to undefined FE_* macros when
    building glibc.  This patch adds a suitable math_private.h, based on
    the MicroBlaze one (Nios II and Tile also have similar files).
    
    There's a case for having such a file in sysdeps/ieee754/soft-fp so
    this logic is applied more generally to configurations without
    exceptions and rounding modes, even when the relevant macros are
    defined in fenv.h - the only case where that might be inappropriate is
    ARM soft-float (where the fenv.h functions might or might not work at
    runtime, depending on whether the processor used at runtime supports
    VFP).  There's also a case that soft-float configurations (on
    processors with both hard-float and soft-float) should more
    consistently avoid defining FE_* macros in bits/fenv.h when not
    actually supported.  But both of those are separate potential
    cleanups.
    
    This allows the no-FPU ColdFire build to get further (another fix is
    needed to allow the build to complete).
    
    	* sysdeps/m68k/coldfire/nofpu/math_private.h: New file.  Based on
    	MicroBlaze file.

diff --git a/ChangeLog b/ChangeLog
index cc7a92c..fc74d71 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2018-01-24  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/m68k/coldfire/nofpu/math_private.h: New file.  Based on
+	MicroBlaze file.
+
 	* sysdeps/unix/sysv/linux/m68k/coldfire/jmp_buf-macros.h: Move to
 	....
 	* sysdeps/unix/sysv/linux/m68k/coldfire/fpu/jmp_buf-macros.h:
diff --git a/sysdeps/m68k/coldfire/nofpu/math_private.h b/sysdeps/m68k/coldfire/nofpu/math_private.h
new file mode 100644
index 0000000..879577b
--- /dev/null
+++ b/sysdeps/m68k/coldfire/nofpu/math_private.h
@@ -0,0 +1,52 @@
+/* Disable use of exceptions and rounding modes for no-FPU ColdFire.
+   Copyright (C) 2012-2018 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/>.  */
+
+#ifndef COLDFIRE_NOFPU_MATH_PRIVATE_H
+#define COLDFIRE_NOFPU_MATH_PRIVATE_H 1
+
+/* Suppress use of exceptions and rounding modes here to avoid build
+   errors if the FE_* macros aren't defined.
+
+   We intentionally ignore the "exception" arguments of functions that
+   take an exception, since we can't even evaluate the argument
+   without causing a build failure.  The extra level of statement
+   expression wrapping avoids "statement with no effect" warnings.
+   Since the callers don't check for errors anyway, we just claim
+   success in every case.
+
+   The overrides for libc_ functions must happen before we include
+   the generic math_private.h, and the overrides for regular
+   <fenv.h> functions must happen afterwards, to avoid clashing with
+   the declarations of those functions.  */
+
+#define libc_fesetround(rnd)                   ({ 0; })
+#define libc_fetestexcept(exc)                 ({ 0; })
+#define libc_feholdexcept_setround(env, exc)   ({ (void) (env); 0; })
+#define libc_feupdateenv_test(env, exc)        ({ (void) (env); 0; })
+
+/* Enable __finitel, __isinfl, and __isnanl for binary compatibility
+   when built without long double support. */
+#define LDBL_CLASSIFY_COMPAT 1
+
+#include_next <math_private.h>
+
+#define feraiseexcept(excepts)                 ({ 0; })
+#define __feraiseexcept(excepts)               ({ 0; })
+#define feclearexcept(exc)                     ({ 0; })
+
+#endif

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                          |    3 ++
 .../coldfire/nofpu}/math_private.h                 |   29 ++++++++++++++-----
 2 files changed, 24 insertions(+), 8 deletions(-)
 copy sysdeps/{microblaze => m68k/coldfire/nofpu}/math_private.h (53%)


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