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>

12 files changed, 21 insertions, 22 deletions

diff --git a/sysdeps/powerpc/fpu/e_hypot.c b/sysdeps/powerpc/fpu/e_hypot.c
index 0466b22..df59441 100644
--- a/sysdeps/powerpc/fpu/e_hypot.c
+++ b/sysdeps/powerpc/fpu/e_hypot.c
@@ -21,6 +21,7 @@
 #include <math_private.h>
 #include <math-underflow.h>
 #include <stdint.h>
+#include <libm-alias-finite.h>
 
 /* __ieee754_hypot(x,y)
  *
@@ -82,4 +83,6 @@ __ieee754_hypot (double x, double y)
     }
   return sqrt (x * x + y * y);
 }
-strong_alias (__ieee754_hypot, __hypot_finite)
+#ifndef __ieee754_hypot
+libm_alias_finite (__ieee754_hypot, __hypot)
+#endif
diff --git a/sysdeps/powerpc/fpu/e_hypotf.c b/sysdeps/powerpc/fpu/e_hypotf.c
index 4fe9bbf..acfe29b 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
diff --git a/sysdeps/powerpc/fpu/e_sqrt.c b/sysdeps/powerpc/fpu/e_sqrt.c
index 1e584c5..a47f779 100644
--- a/sysdeps/powerpc/fpu/e_sqrt.c
+++ b/sysdeps/powerpc/fpu/e_sqrt.c
@@ -24,6 +24,7 @@
 #include <stdint.h>
 #include <sysdep.h>
 #include <ldsodefs.h>
+#include <libm-alias-finite.h>
 
 #ifndef _ARCH_PPCSQ
 static const double almost_half = 0.5000000000000001;	/* 0.5 + 2^-53 */
@@ -173,4 +174,4 @@ __ieee754_sqrt (double x)
 
   return z;
 }
-strong_alias (__ieee754_sqrt, __sqrt_finite)
+libm_alias_finite (__ieee754_sqrt, __sqrt)
diff --git a/sysdeps/powerpc/fpu/e_sqrtf.c b/sysdeps/powerpc/fpu/e_sqrtf.c
index 25273f1..f119dcf 100644
--- a/sysdeps/powerpc/fpu/e_sqrtf.c
+++ b/sysdeps/powerpc/fpu/e_sqrtf.c
@@ -24,6 +24,7 @@
 #include <stdint.h>
 #include <sysdep.h>
 #include <ldsodefs.h>
+#include <libm-alias-finite.h>
 
 #ifndef _ARCH_PPCSQ
 static const float almost_half = 0.50000006;	/* 0.5 + 2^-24 */
@@ -148,4 +149,4 @@ __ieee754_sqrtf (float x)
 
   return z;
 }
-strong_alias (__ieee754_sqrtf, __sqrtf_finite)
+libm_alias_finite (__ieee754_sqrtf, __sqrtf)
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-power7.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-power7.c
index 9854219..4d5db60 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-power7.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-power7.c
@@ -18,9 +18,6 @@
 
 #include <math.h>
 
-#undef strong_alias
-#define strong_alias(a, b)
-
 #define __ieee754_hypot __ieee754_hypot_power7
 
 #include <sysdeps/powerpc/fpu/e_hypot.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-ppc32.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-ppc32.c
index 5843ec1..4df81e4 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-ppc32.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot-ppc32.c
@@ -18,9 +18,6 @@
 
 #include <math.h>
 
-#undef strong_alias
-#define strong_alias(a, b)
-
 #define __ieee754_hypot __ieee754_hypot_ppc32
 
 #include <sysdeps/powerpc/fpu/e_hypot.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot.c
index 9bf7fb1..a6c9b06 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot.c
@@ -19,7 +19,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <math_ldbl_opt.h>
-#include <shlib-compat.h>
+#include <libm-alias-finite.h>
 #include "init-arch.h"
 
 extern __typeof (__ieee754_hypot) __ieee754_hypot_ppc32 attribute_hidden;
@@ -30,4 +30,4 @@ libc_ifunc (__ieee754_hypot,
 	    ? __ieee754_hypot_power7
             : __ieee754_hypot_ppc32);
 
-strong_alias (__ieee754_hypot, __hypot_finite)
+libm_alias_finite (__ieee754_hypot, __hypot)
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-power7.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-power7.c
index d45b17c..fa3efae 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-power7.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-power7.c
@@ -18,9 +18,6 @@
 
 #include <math.h>
 
-#undef strong_alias
-#define strong_alias(a, b)
-
 #define __ieee754_hypotf __ieee754_hypotf_power7
 
 #include <sysdeps/powerpc/fpu/e_hypotf.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-ppc32.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-ppc32.c
index 6d81381..ff0c808 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-ppc32.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf-ppc32.c
@@ -18,9 +18,6 @@
 
 #include <math.h>
 
-#undef strong_alias
-#define strong_alias(a, b)
-
 #define __ieee754_hypotf __ieee754_hypotf_ppc32
 
 #include <sysdeps/ieee754/flt-32/e_hypotf.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf.c b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf.c
index 48be6ff..130b51f 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf.c
@@ -19,7 +19,7 @@
 #include <math.h>
 #include <math_private.h>
 #include <math_ldbl_opt.h>
-#include <shlib-compat.h>
+#include <libm-alias-finite.h>
 #include "init-arch.h"
 
 extern __typeof (__ieee754_hypotf) __ieee754_hypotf_ppc32 attribute_hidden;
@@ -30,4 +30,4 @@ libc_ifunc (__ieee754_hypotf,
 	    ? __ieee754_hypotf_power7
             : __ieee754_hypotf_ppc32);
 
-strong_alias (__ieee754_hypotf, __hypotf_finite)
+libm_alias_finite (__ieee754_hypotf, __hypotf)
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/e_sqrtf128.c b/sysdeps/powerpc/powerpc64/le/fpu/e_sqrtf128.c
index 32c948c..950bdad 100644
--- a/sysdeps/powerpc/powerpc64/le/fpu/e_sqrtf128.c
+++ b/sysdeps/powerpc/powerpc64/le/fpu/e_sqrtf128.c
@@ -27,6 +27,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <math.h>
+#include <libm-alias-finite.h>
 
 /* Unavoidable hacks since TFmode is assumed to be binary128 when
    -mabi=ibmlongdouble is used.  */
@@ -53,4 +54,4 @@ __ieee754_sqrtf128 (__float128 a)
   FP_HANDLE_EXCEPTIONS;
   return r;
 }
-strong_alias (__ieee754_sqrtf128, __sqrtf128_finite)
+libm_alias_finite (__ieee754_sqrtf128, __sqrtf128)
diff --git a/sysdeps/powerpc/powerpc64/le/power9/fpu/e_sqrtf128.c b/sysdeps/powerpc/powerpc64/le/power9/fpu/e_sqrtf128.c
index 9784f8d..232fc77 100644
--- a/sysdeps/powerpc/powerpc64/le/power9/fpu/e_sqrtf128.c
+++ b/sysdeps/powerpc/powerpc64/le/power9/fpu/e_sqrtf128.c
@@ -26,6 +26,8 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <libm-alias-finite.h>
+
 __float128
 __ieee754_sqrtf128 (__float128 a)
 {
@@ -33,4 +35,4 @@ __ieee754_sqrtf128 (__float128 a)
   asm ("xssqrtqp %0,%1" : "=v" (z) : "v" (a));
   return z;
 }
-strong_alias (__ieee754_sqrtf128, __sqrtf128_finite)
+libm_alias_finite (__ieee754_sqrtf128, __sqrtf128)