Add libm_alias_finite for _finite symbols

This patch adds a new macro, libm_alias_finite, to define all _finite
symbol.  It sets all _finite symbol as compat symbol based on its first
version (obtained from the definition at built generated first-versions.h).

The <fn>f128_finite symbols were introduced in GLIBC 2.26 and so need
special treatment in code that is shared between long double and float128.
It is done by adding a list, similar to internal symbol redifinition,
on sysdeps/ieee754/float128/float128_private.h.

Alpha also needs some tricky changes to ensure we still emit 2 compat
symbols for sqrt(f).

Passes buildmanyglibc.

Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

6 files changed, 12 insertions, 10 deletions

diff --git a/math/e_exp10.c b/math/e_exp10.c
index 1432879..73c3cf0 100644
--- a/math/e_exp10.c
+++ b/math/e_exp10.c
@@ -19,6 +19,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <float.h>
+#include <libm-alias-finite.h>
 
 double
 __ieee754_exp10 (double arg)
@@ -30,4 +31,4 @@ __ieee754_exp10 (double arg)
        replaced sometime (soon?).  */
     return __ieee754_exp (M_LN10 * arg);
 }
-strong_alias (__ieee754_exp10, __exp10_finite)
+libm_alias_finite (__ieee754_exp10, __exp10)
diff --git a/math/e_exp10f.c b/math/e_exp10f.c
index 5a06a1e..93c41d0 100644
--- a/math/e_exp10f.c
+++ b/math/e_exp10f.c
@@ -18,7 +18,7 @@
 
 #include <math.h>
 #include <math_private.h>
-
+#include <libm-alias-finite.h>
 
 float
 __ieee754_exp10f (float arg)
@@ -29,4 +29,4 @@ __ieee754_exp10f (float arg)
      this.  */
   return __ieee754_exp (M_LN10 * arg);
 }
-strong_alias (__ieee754_exp10f, __exp10f_finite)
+libm_alias_finite (__ieee754_exp10f, __exp10f)
diff --git a/math/e_exp10l.c b/math/e_exp10l.c
index ac56f98..b33d6fe 100644
--- a/math/e_exp10l.c
+++ b/math/e_exp10l.c
@@ -19,6 +19,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <float.h>
+#include <libm-alias-finite.h>
 
 long double
 __ieee754_exp10l (long double arg)
@@ -30,4 +31,4 @@ __ieee754_exp10l (long double arg)
        replaced sometime (soon?).  */
     return __ieee754_expl (M_LN10l * arg);
 }
-strong_alias (__ieee754_exp10l, __exp10l_finite)
+libm_alias_finite (__ieee754_exp10, __exp10)
diff --git a/math/e_scalb.c b/math/e_scalb.c
index e5e8e29..dbe3b51 100644
--- a/math/e_scalb.c
+++ b/math/e_scalb.c
@@ -18,7 +18,7 @@
 
 #include <math.h>
 #include <math_private.h>
-
+#include <libm-alias-finite.h>
 
 static double
 __attribute__ ((noinline))
@@ -51,4 +51,4 @@ __ieee754_scalb (double x, double fn)
 
   return __scalbn (x, (int) fn);
 }
-strong_alias (__ieee754_scalb, __scalb_finite)
+libm_alias_finite (__ieee754_scalb, __scalb)
diff --git a/math/e_scalbf.c b/math/e_scalbf.c
index 3c68787..944cfbe 100644
--- a/math/e_scalbf.c
+++ b/math/e_scalbf.c
@@ -18,7 +18,7 @@
 
 #include <math.h>
 #include <math_private.h>
-
+#include <libm-alias-finite.h>
 
 static float
 __attribute__ ((noinline))
@@ -51,4 +51,4 @@ __ieee754_scalbf (float x, float fn)
 
   return __scalbnf (x, (int) fn);
 }
-strong_alias (__ieee754_scalbf, __scalbf_finite)
+libm_alias_finite (__ieee754_scalbf, __scalbf)
diff --git a/math/e_scalbl.c b/math/e_scalbl.c
index 9e9bc6c..6595ec6 100644
--- a/math/e_scalbl.c
+++ b/math/e_scalbl.c
@@ -18,7 +18,7 @@
 
 #include <math.h>
 #include <math_private.h>
-
+#include <libm-alias-finite.h>
 
 static long double
 __attribute__ ((noinline))
@@ -51,4 +51,4 @@ __ieee754_scalbl (long double x, long double fn)
 
   return __scalbnl (x, (int) fn);
 }
-strong_alias (__ieee754_scalbl, __scalbl_finite)
+libm_alias_finite (__ieee754_scalbl, __scalbl)