Add libm_alias_*_other_r macros.

Some libm functions are unable to use the generic alias macros such as
libm_alias_double because they have special symbol versioning
requirements for the main float, double or long double public names.

To facilitate adding _FloatN / _FloatNx function aliases in future,
it's still desirable to have generic macros those functions can use as
far as possible.  This patch adds macros such as
libm_alias_double_other, which only define names for _FloatN /
_FloatNx aliases, not for float / double / long double.  As present,
all these new macros do nothing, but they are called in the
appropriate places in macros such as libm_alias_double.  This patch
also arranges for lgamma implementations, and the recently added
optimized float function implementations, to use the new macros to
make them ready for addition of _FloatN / _FloatNx aliases.

Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by this patch.

	* sysdeps/generic/libm-alias-double.h (libm_alias_double_other_r):
	New macro.
	(libm_alias_double_other): Likewise.
	(libm_alias_double_r): Use libm_alias_double_other_r.
	* sysdeps/generic/libm-alias-float.h (libm_alias_float_other_r):
	New macro.
	(libm_alias_float_other): Likewise.
	(libm_alias_float_r): Use libm_alias_float_other_r.
	* sysdeps/generic/libm-alias-float128.h
	(libm_alias_float128_other_r): New macro.
	(libm_alias_float128_other): Likewise.
	(libm_alias_float128_r): Use libm_alias_float128_other_r.
	* sysdeps/generic/libm-alias-ldouble.h
	(libm_alias_ldouble_other_r): New macro.
	(libm_alias_ldouble_other): Likewise.
	(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
	* sysdeps/ieee754/ldbl-opt/libm-alias-double.h
	(libm_alias_double_other_r): New macro.
	(libm_alias_double_other): Likewise.
	(libm_alias_double_r): Use libm_alias_double_other_r.
	* sysdeps/ieee754/ldbl-opt/libm-alias-ldouble.h
	(libm_alias_ldouble_other_r): New macro.
	(libm_alias_ldouble_other): Likewise.
	(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
	* math/w_lgamma_main.c: Include <libm-alias-double.h>.
	[!USE_AS_COMPAT]: Use libm_alias_double_other.
	* math/w_lgammaf_main.c: Include <libm-alias-float.h>.
	[!USE_AS_COMPAT]: Use libm_alias_float_other.
	* math/w_lgammal_main.c: Include <libm-alias-ldouble.h>.
	[!USE_AS_COMPAT]: Use libm_alias_ldouble_other.
	* math/w_exp2f.c: Use libm_alias_float_other.
	* math/w_expf.c: Likewise.
	* math/w_log2f.c: Likewise.
	* math/w_logf.c: Likewise.
	* math/w_powf.c: Likewise.
	* sysdeps/ieee754/flt-32/e_exp2f.c: Include <libm-alias-float.h>.
	[!__exp2f]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_expf.c: Include <libm-alias-float.h>.
	[!__expf]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_log2f.c: Include <libm-alias-float.h>.
	[!__log2f]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_logf.c: Include <libm-alias-float.h>.
	[!__logf]: Use libm_alias_float_other.
	* sysdeps/ieee754/flt-32/e_powf.c: Include <libm-alias-float.h>.
	[!__powf]: Use libm_alias_float_other.

1 files changed, 48 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index f59f3466b6..a3c6b0ab19 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,51 @@
+2017-10-10  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/generic/libm-alias-double.h (libm_alias_double_other_r):
+	New macro.
+	(libm_alias_double_other): Likewise.
+	(libm_alias_double_r): Use libm_alias_double_other_r.
+	* sysdeps/generic/libm-alias-float.h (libm_alias_float_other_r):
+	New macro.
+	(libm_alias_float_other): Likewise.
+	(libm_alias_float_r): Use libm_alias_float_other_r.
+	* sysdeps/generic/libm-alias-float128.h
+	(libm_alias_float128_other_r): New macro.
+	(libm_alias_float128_other): Likewise.
+	(libm_alias_float128_r): Use libm_alias_float128_other_r.
+	* sysdeps/generic/libm-alias-ldouble.h
+	(libm_alias_ldouble_other_r): New macro.
+	(libm_alias_ldouble_other): Likewise.
+	(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
+	* sysdeps/ieee754/ldbl-opt/libm-alias-double.h
+	(libm_alias_double_other_r): New macro.
+	(libm_alias_double_other): Likewise.
+	(libm_alias_double_r): Use libm_alias_double_other_r.
+	* sysdeps/ieee754/ldbl-opt/libm-alias-ldouble.h
+	(libm_alias_ldouble_other_r): New macro.
+	(libm_alias_ldouble_other): Likewise.
+	(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
+	* math/w_lgamma_main.c: Include <libm-alias-double.h>.
+	[!USE_AS_COMPAT]: Use libm_alias_double_other.
+	* math/w_lgammaf_main.c: Include <libm-alias-float.h>.
+	[!USE_AS_COMPAT]: Use libm_alias_float_other.
+	* math/w_lgammal_main.c: Include <libm-alias-ldouble.h>.
+	[!USE_AS_COMPAT]: Use libm_alias_ldouble_other.
+	* math/w_exp2f.c: Use libm_alias_float_other.
+	* math/w_expf.c: Likewise.
+	* math/w_log2f.c: Likewise.
+	* math/w_logf.c: Likewise.
+	* math/w_powf.c: Likewise.
+	* sysdeps/ieee754/flt-32/e_exp2f.c: Include <libm-alias-float.h>.
+	[!__exp2f]: Use libm_alias_float_other.
+	* sysdeps/ieee754/flt-32/e_expf.c: Include <libm-alias-float.h>.
+	[!__expf]: Use libm_alias_float_other.
+	* sysdeps/ieee754/flt-32/e_log2f.c: Include <libm-alias-float.h>.
+	[!__log2f]: Use libm_alias_float_other.
+	* sysdeps/ieee754/flt-32/e_logf.c: Include <libm-alias-float.h>.
+	[!__logf]: Use libm_alias_float_other.
+	* sysdeps/ieee754/flt-32/e_powf.c: Include <libm-alias-float.h>.
+	[!__powf]: Use libm_alias_float_other.
+
 2017-10-10  Florian Weimer  <fweimer@redhat.com>
 
 	* nss/nss_files/files-hosts.c (gethostbyname3_multi): New