Make ldexpF generic.

This one is a little more tricky since it is built both for
libm and libc, and exports multiple aliases.

To simplify aliasing, a new macro is introduced which handles
aliasing to two symbols.  By default, it just applies
declare_mgen_alias to both target symbols.

Likewise, the makefile is tweaked a little to generate
templates for shared files too, and a new rule is added
to build m_*.c objects from the objpfx directory.

Verified there are no symbol or code changes using a script
to diff the *_ldexp* object files on s390x, aarch64, arm,
x86_64, and ppc64.

1 files changed, 23 insertions, 2 deletions

diff --git a/sysdeps/ieee754/ldbl-opt/s_ldexp.c b/sysdeps/ieee754/ldbl-opt/s_ldexp.c
index 20e107be7e..65f96e0a4c 100644
--- a/sysdeps/ieee754/ldbl-opt/s_ldexp.c
+++ b/sysdeps/ieee754/ldbl-opt/s_ldexp.c
@@ -1,5 +1,26 @@
-#include <math_ldbl_opt.h>
-#include <math/s_ldexp.c>
+/* ldexp alias overrides for platforms where long double
+   was previously not unique.
+   Copyright (C) 2016 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/>.  */
+
+#define M_LIBM_NEED_COMPAT(f) 0
+#include <math-type-macros-double.h>
+#include <s_ldexp_template.c>
+
 #if IS_IN (libm)
 # if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
 compat_symbol (libm, __ldexp, ldexpl, GLIBC_2_0);