Use generic macros for lgamma_r function aliases.

Continuing the use of generic macros for defining libm function
aliases, in preparation for adding more _FloatN / _FloatNx function
names, this patch makes the lgamma_r functions use such macros.

declare_mgen_alias_r becomes a standard macro in math-type-macros.h
instead of being locally defined in w_lgamma_r_templace.c.  This in
turn must be defined by each math-type-macros-<type>.h.  Rather than
providing an unused default in math-type-macros.h, that header is made
to give an error if math-type-macros-<type>.h failed to define
declare_mgen_alias or declare_mgen_alias_r.  The compat lgamma_r
wrappers are updated similarly.  The ldbl-opt versions are removed as
no longer needed.

Tested for x86_64, and with build-many-glibcs.py.  Installed stripped
shared libraries are unchanged except for powerpc64le (where the usual
issue applies that an ldbl-opt long double function previously used
long_double_symbol unconditionally and now the symbol versions on
powerpc64le mean weak_alias is used instead, resulting in the same
symbol versions in the final shared library but still enough
difference in the input objects for that library not to be
byte-identical).

	* sysdeps/generic/math-type-macros.h [!declare_mgen_alias]: Give
	error.  Remove default definition of declare_mgen_alias.
	[!declare_mgen_alias_r]: Likewise.
	* sysdeps/generic/math-type-macros-double.h
	[!declare_mgen_alias_r] (declare_mgen_alias_r): New macro.
	* sysdeps/generic/math-type-macros-float.h [!declare_mgen_alias_r]
	(declare_mgen_alias_r): Likewise.
	* sysdeps/generic/math-type-macros-float128.h
	[!declare_mgen_alias_r] (declare_mgen_alias_r): Likewise.
	* sysdeps/generic/math-type-macros-ldouble.h
	[!declare_mgen_alias_r] (declare_mgen_alias_r): Likewise.
	* math/w_lgamma_r_template.c (declare_mgen_alias_r_x): Remove
	macro.
	(declare_mgen_alias_r_s): Likewise.
	(declare_mgen_alias_r): Likewise.
	* math/w_lgamma_r_compat.c: Include <libm-alias-double.h>.
	(lgamma_r): Define using libm_alias_double_r.
	* math/w_lgammaf_r_compat.c: Include <libm-alias-float.h>.
	(lgammaf_r): Define using libm_alias_float_r.
	* math/w_lgammal_r_compat.c: Include <libm-alias-ldouble.h>.
	(lgammal_r): Define using libm_alias_ldouble_r.
	* sysdeps/ieee754/ldbl-opt/w_lgamma_r_compat.c: Remove file.
	* sysdeps/ieee754/ldbl-opt/w_lgammal_r_compat.c: Likewise.

4 files changed, 6 insertions, 13 deletions

diff --git a/math/w_lgamma_r_compat.c b/math/w_lgamma_r_compat.c
index f88a5df..5b3ceaa 100644
--- a/math/w_lgamma_r_compat.c
+++ b/math/w_lgamma_r_compat.c
@@ -17,6 +17,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <math-svid-compat.h>
+#include <libm-alias-double.h>
 
 
 #if LIBM_SVID_COMPAT
@@ -33,9 +34,5 @@ __lgamma_r(double x, int *signgamp)
 
 	return y;
 }
-weak_alias (__lgamma_r, lgamma_r)
-# ifdef NO_LONG_DOUBLE
-strong_alias (__lgamma_r, __lgammal_r)
-weak_alias (__lgamma_r, lgammal_r)
-# endif
+libm_alias_double_r (__lgamma, lgamma, _r)
 #endif
diff --git a/math/w_lgamma_r_template.c b/math/w_lgamma_r_template.c
index 5610db1..57c285b 100644
--- a/math/w_lgamma_r_template.c
+++ b/math/w_lgamma_r_template.c
@@ -34,12 +34,6 @@
 #define M_CALL_FUNC_R_S(x) M_CALL_FUNC_R_X (x)
 #define M_CALL_FUNC_R(x) M_CALL_FUNC_R_S (M_SUF (x))
 
-#define declare_mgen_alias_r_x(from, to) weak_alias (from ## _r, to ## _r)
-#define declare_mgen_alias_r_s(from, to) \
-	declare_mgen_alias_r_x (from, to)
-#define declare_mgen_alias_r(from, to) \
-	declare_mgen_alias_r_s (M_SUF (from), M_SUF (to))
-
 FLOAT
 M_DECL_FUNC_R (__lgamma) (FLOAT x, int *signgamp)
 {
diff --git a/math/w_lgammaf_r_compat.c b/math/w_lgammaf_r_compat.c
index 86003de..c7751f1 100644
--- a/math/w_lgammaf_r_compat.c
+++ b/math/w_lgammaf_r_compat.c
@@ -20,6 +20,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <math-svid-compat.h>
+#include <libm-alias-float.h>
 
 
 #if LIBM_SVID_COMPAT
@@ -36,5 +37,5 @@ __lgammaf_r(float x, int *signgamp)
 
 	return y;
 }
-weak_alias (__lgammaf_r, lgammaf_r)
+libm_alias_float_r (__lgamma, lgamma, _r)
 #endif
diff --git a/math/w_lgammal_r_compat.c b/math/w_lgammal_r_compat.c
index 781bfa4..09a8070 100644
--- a/math/w_lgammal_r_compat.c
+++ b/math/w_lgammal_r_compat.c
@@ -21,6 +21,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <math-svid-compat.h>
+#include <libm-alias-ldouble.h>
 
 
 #if LIBM_SVID_COMPAT
@@ -37,5 +38,5 @@ __lgammal_r(long double x, int *signgamp)
 
 	return y;
 }
-weak_alias (__lgammal_r, lgammal_r)
+libm_alias_ldouble_r (__lgamma, lgamma, _r)
 #endif