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>

1 files changed, 4 insertions, 1 deletions

diff --git a/sysdeps/powerpc/fpu/e_hypotf.c b/sysdeps/powerpc/fpu/e_hypotf.c
index 4fe9bbf9e0..acfe29b2ac 100644
--- a/sysdeps/powerpc/fpu/e_hypotf.c
+++ b/sysdeps/powerpc/fpu/e_hypotf.c
@@ -20,6 +20,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <stdint.h>
+#include <libm-alias-finite.h>
 
 /* __ieee754_hypotf(x,y)
 
@@ -73,4 +74,6 @@ __ieee754_hypotf (float x, float y)
 
   return sqrt ((double) x * x + (double) y * y);
 }
-strong_alias (__ieee754_hypotf, __hypotf_finite)
+#ifndef __ieee754_hypotf
+libm_alias_finite (__ieee754_hypotf, __hypotf)
+#endif