Obsolete pow10 functions.

This patch obsoletes the pow10, pow10f and pow10l functions (makes
them into compat symbols, not available for new ports or static
linking).  The exp10 names for these functions are standardized (in TS
18661-4) and were added in the same glibc version (2.1) as pow10 so
source code can change to use them without any loss of portability.
Since pow10 is deliberately not provided for _Float128, only exp10,
this slightly simplifies moving to the new wrapper templates in the
!LIBM_SVID_COMPAT case, by avoiding needing to arrange for pow10,
pow10f and pow10l to be defined by those templates.

Tested for x86_64, and with build-many-glibcs.py.

	* manual/math.texi (pow10): Do not document.
	(pow10f): Likewise.
	(pow10l): Likewise.
	* math/bits/mathcalls.h [__USE_GNU] (pow10): Do not declare.
	* math/bits/math-finite.h [__USE_GNU] (pow10): Likewise.
	* math/libm-test-exp10.inc (pow10_test): Remove.
	(do_test): Do not call pow10.
	* math/w_exp10_compat.c (pow10): Make into compat symbol.
	[NO_LONG_DOUBLE] (pow10l): Likewise.
	* math/w_exp10f_compat.c (pow10f): Likewise.
	* math/w_exp10l_compat.c (pow10l): Likewise.
	* sysdeps/ia64/fpu/e_exp10.S: Include <shlib-compat.h>.
	(pow10): Make into compat symbol.
	* sysdeps/ia64/fpu/e_exp10f.S: Include <shlib-compat.h>.
	(pow10f): Make into compat symbol.
	* sysdeps/ia64/fpu/e_exp10l.S: Include <shlib-compat.h>.
	(pow10l): Make into compat symbol.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Remove
	pow10.
	(CFLAGS-nldbl-pow10.c): Remove variable..
	* sysdeps/ieee754/ldbl-opt/nldbl-pow10.c: Remove file.
	* sysdeps/ieee754/ldbl-opt/w_exp10_compat.c (pow10l): Condition on
	[SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)].
	* sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c (compat_symbol):
	Undefine and redefine.
	(pow10l): Make into compat symbol.
	* sysdeps/aarch64/libm-test-ulps: Remove pow10 ulps.
	* sysdeps/alpha/fpu/libm-test-ulps: Likewise.
	* sysdeps/arm/libm-test-ulps: Likewise.
	* sysdeps/hppa/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/microblaze/libm-test-ulps: Likewise.
	* sysdeps/mips/mips32/libm-test-ulps: Likewise.
	* sysdeps/mips/mips64/libm-test-ulps: Likewise.
	* sysdeps/nios2/libm-test-ulps: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Likewise.
	* sysdeps/powerpc/nofpu/libm-test-ulps: Likewise.
	* sysdeps/s390/fpu/libm-test-ulps: Likewise.
	* sysdeps/sh/libm-test-ulps: Likewise.
	* sysdeps/sparc/fpu/libm-test-ulps: Likewise.
	* sysdeps/tile/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.

4 files changed, 18 insertions, 12 deletions

diff --git a/sysdeps/ieee754/ldbl-opt/Makefile b/sysdeps/ieee754/ldbl-opt/Makefile
index 81429d0ddd..ffc55d1d9a 100644
--- a/sysdeps/ieee754/ldbl-opt/Makefile
+++ b/sysdeps/ieee754/ldbl-opt/Makefile
@@ -29,7 +29,7 @@ libnldbl-calls = asprintf dprintf fprintf fscanf fwprintf fwscanf iovfscanf \
 		 qecvt qfcvt qgcvt qecvt_r qfcvt_r \
 		 isinf isnan finite signbit scalb log2 lgamma_r ceil \
 		 significand acos asin atan atan2 cos sin tan cosh sinh \
-		 tanh acosh asinh atanh exp log log10 exp10 pow10 expm1 \
+		 tanh acosh asinh atanh exp log log10 exp10 expm1 \
 		 log1p logb exp2 sqrt cbrt fabs floor j0 j1 y0 y1 erf erfc \
 		 lgamma tgamma gamma rint nearbyint round trunc \
 		 copysign fdim fmax fmin nextafter pow hypot fmod \
@@ -136,7 +136,6 @@ CFLAGS-nldbl-nexttoward.c = -fno-builtin-nexttoward -fno-builtin-nexttowardl
 CFLAGS-nldbl-nexttowardf.c = -fno-builtin-nexttowardf
 CFLAGS-nldbl-nextup.c = -fno-builtin-nextupl
 CFLAGS-nldbl-pow.c = -fno-builtin-powl
-CFLAGS-nldbl-pow10.c = -fno-builtin-pow10l
 CFLAGS-nldbl-remainder.c = -fno-builtin-remainderl -fno-builtin-dreml
 CFLAGS-nldbl-remquo.c = -fno-builtin-remquol
 CFLAGS-nldbl-rint.c = -fno-builtin-rintl
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-pow10.c b/sysdeps/ieee754/ldbl-opt/nldbl-pow10.c
deleted file mode 100644
index 20ebf8d1bb..0000000000
--- a/sysdeps/ieee754/ldbl-opt/nldbl-pow10.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "nldbl-compat.h"
-
-double
-attribute_hidden
-pow10l (double x)
-{
-  return pow10 (x);
-}
diff --git a/sysdeps/ieee754/ldbl-opt/w_exp10_compat.c b/sysdeps/ieee754/ldbl-opt/w_exp10_compat.c
index 142a70bcd6..eb132cfbe5 100644
--- a/sysdeps/ieee754/ldbl-opt/w_exp10_compat.c
+++ b/sysdeps/ieee754/ldbl-opt/w_exp10_compat.c
@@ -2,5 +2,8 @@
 #include <math/w_exp10_compat.c>
 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
 compat_symbol (libm, __exp10, exp10l, GLIBC_2_1);
-compat_symbol (libm, __pow10, pow10l, GLIBC_2_1);
+# if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
+strong_alias (__pow10, __pow10_pow10l)
+compat_symbol (libm, __pow10_pow10l, pow10l, GLIBC_2_1);
+# endif
 #endif
diff --git a/sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c b/sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c
index 8f2ccd3441..cf154882fe 100644
--- a/sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c
+++ b/sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c
@@ -1,6 +1,18 @@
 #include <math_ldbl_opt.h>
 #undef weak_alias
 #define weak_alias(n,a)
+#undef compat_symbol
+#define compat_symbol(l,n,a,v)
 #include <math/w_exp10l_compat.c>
 long_double_symbol (libm, __exp10l, exp10l);
-long_double_symbol (libm, __pow10l, pow10l);
+#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
+/* compat_symbol was undefined and redefined above to avoid the
+   default pow10l compat symbol at version GLIBC_2_1 (as for ldbl-opt
+   configurations, that version should have the alias to exp10).  So
+   it now needs to be redefined to define the compat symbol at version
+   LONG_DOUBLE_COMPAT_VERSION.  */
+# undef compat_symbol
+# define compat_symbol(lib, local, symbol, version)	\
+  compat_symbol_reference (lib, local, symbol, version)
+compat_symbol (libm, __pow10l, pow10l, LONG_DOUBLE_COMPAT_VERSION);
+#endif