Fix m68k bits/mathinline.h attributes (bug 22631).

m68k bits/mathinline.h declares various functions with const
attributes.  These are inappropriate for functions that have results
depending on the rounding mode; the machine-independent
bits/mathcalls.h only uses const attributes for a very few functions
with no rounding mode dependence, and the m68k header should do
likewise.  GCC uses pure for such functions with -frounding-math,
resulting in GCC mainline warning for conflicts with between the
header and the built-in attributes and glibc failing to build for m68k
with GCC mainline.

This patch fixes the attributes to avoid using const except when
bits/mathcalls.h does so.  (There are a few functions where maybe
bits/mathcalls.h could do so but doesn't, but keeping the headers in
sync in this regard seems to be the safe approach.)

Tested compilation with build-many-glibcs.py with GCC mainline.

	[BZ #22631]
	* sysdeps/m68k/m680x0/fpu/bits/mathinline.h (__m81_defun): Add
	argument for attrubutes.  All callers changed.
	(__inline_mathop1): Likewise.  All callers changed.
	(__inline_mathop): Likewise.  All callers changed.
	[__USE_MISC] (scalbn): Use __inline_forward instead of
	__inline_forward_c.
	[__USE_ISOC99] (scalbln): Likewise.
	[__USE_ISOC99] (nearbyint): Likewise.
	[__USE_ISOC99] (lrint): Likewise.
	[__USE_MISC] (scalbnf): Likewise.
	[__USE_ISOC99] (scalblnf): Likewise.
	[__USE_ISOC99] (nearbyintf): Likewise.
	[__USE_ISOC99] (lrintf): Likewise.
	[__USE_MISC] (scalbnl): Likewise.
	[__USE_ISOC99] (scalblnl): Likewise.
	[__USE_ISOC99] (nearbyintl): Likewise.
	[__USE_ISOC99] (lrintl): Likewise.
	* sysdeps/m68k/m680x0/fpu/mathimpl.h: All callers of
	__inline_mathop and __m81_defun changed.

3 files changed, 94 insertions, 68 deletions

diff --git a/ChangeLog b/ChangeLog
index 95e8df9..4f869a9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,26 @@
 2017-12-19  Joseph Myers  <joseph@codesourcery.com>
 
+	[BZ #22631]
+	* sysdeps/m68k/m680x0/fpu/bits/mathinline.h (__m81_defun): Add
+	argument for attrubutes.  All callers changed.
+	(__inline_mathop1): Likewise.  All callers changed.
+	(__inline_mathop): Likewise.  All callers changed.
+	[__USE_MISC] (scalbn): Use __inline_forward instead of
+	__inline_forward_c.
+	[__USE_ISOC99] (scalbln): Likewise.
+	[__USE_ISOC99] (nearbyint): Likewise.
+	[__USE_ISOC99] (lrint): Likewise.
+	[__USE_MISC] (scalbnf): Likewise.
+	[__USE_ISOC99] (scalblnf): Likewise.
+	[__USE_ISOC99] (nearbyintf): Likewise.
+	[__USE_ISOC99] (lrintf): Likewise.
+	[__USE_MISC] (scalbnl): Likewise.
+	[__USE_ISOC99] (scalblnl): Likewise.
+	[__USE_ISOC99] (nearbyintl): Likewise.
+	[__USE_ISOC99] (lrintl): Likewise.
+	* sysdeps/m68k/m680x0/fpu/mathimpl.h: All callers of
+	__inline_mathop and __m81_defun changed.
+
 	* scripts/build-many-glibcs.py (Context.add_all_configs): Specify
 	CPU or FPU for ARM hard-float configurations.
 
diff --git a/sysdeps/m68k/m680x0/fpu/bits/mathinline.h b/sysdeps/m68k/m680x0/fpu/bits/mathinline.h
index dcc2a4e..ddf3856 100644
--- a/sysdeps/m68k/m680x0/fpu/bits/mathinline.h
+++ b/sysdeps/m68k/m680x0/fpu/bits/mathinline.h
@@ -46,9 +46,9 @@
 # define __M81_MATH_INLINES	1
 #endif
 
-/* Define a const math function.  */
-#define __m81_defun(rettype, func, args)				      \
-  __m81_inline rettype __attribute__((__const__))			      \
+/* Define a math function.  */
+#define __m81_defun(rettype, func, args, attrs)	\
+  __m81_inline rettype attrs			\
   __m81_nth (__m81_u(func) args)
 
 /* Define the three variants of a math function that has a direct
@@ -57,17 +57,17 @@
    is the name of the fpu operation (without leading f).  */
 
 #ifdef __USE_ISOC99
-# define __inline_mathop(func, op)			\
-  __inline_mathop1(double, func, op)			\
-  __inline_mathop1(float, __CONCAT(func,f), op)	\
-  __inline_mathop1(long double, __CONCAT(func,l), op)
+# define __inline_mathop(func, op, attrs)			\
+  __inline_mathop1(double, func, op, attrs)			\
+  __inline_mathop1(float, __CONCAT(func,f), op, attrs)		\
+  __inline_mathop1(long double, __CONCAT(func,l), op, attrs)
 #else
-# define __inline_mathop(func, op)			\
-  __inline_mathop1(double, func, op)
+# define __inline_mathop(func, op, attrs)	\
+  __inline_mathop1(double, func, op, attrs)
 #endif
 
-#define __inline_mathop1(float_type,func, op)				      \
-  __m81_defun (float_type, func, (float_type __mathop_x))		      \
+#define __inline_mathop1(float_type,func, op, attrs)			      \
+  __m81_defun (float_type, func, (float_type __mathop_x), attrs)	      \
   {									      \
     float_type __result;						      \
     __asm __volatile__ ("f" __STRING(op) "%.x %1, %0"			      \
@@ -75,43 +75,43 @@
     return __result;							      \
   }
 
-__inline_mathop(__atan, atan)
-__inline_mathop(__cos, cos)
-__inline_mathop(__sin, sin)
-__inline_mathop(__tan, tan)
-__inline_mathop(__tanh, tanh)
-__inline_mathop(__fabs, abs)
+__inline_mathop(__atan, atan,)
+__inline_mathop(__cos, cos,)
+__inline_mathop(__sin, sin,)
+__inline_mathop(__tan, tan,)
+__inline_mathop(__tanh, tanh,)
+__inline_mathop(__fabs, abs, __attribute__ ((__const__)))
 
 #if defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
-__inline_mathop(__rint, int)
-__inline_mathop(__expm1, etoxm1)
-__inline_mathop(__log1p, lognp1)
+__inline_mathop(__rint, int,)
+__inline_mathop(__expm1, etoxm1,)
+__inline_mathop(__log1p, lognp1,)
 #endif
 
 #ifdef __USE_MISC
-__inline_mathop(__significand, getman)
+__inline_mathop(__significand, getman,)
 #endif
 
 #ifdef __USE_ISOC99
-__inline_mathop(__trunc, intrz)
+__inline_mathop(__trunc, intrz, __attribute__ ((__const__)))
 #endif
 
 #if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
 
-__inline_mathop(atan, atan)
-__inline_mathop(tanh, tanh)
+__inline_mathop(atan, atan,)
+__inline_mathop(tanh, tanh,)
 
 # if defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
-__inline_mathop(rint, int)
-__inline_mathop(log1p, lognp1)
+__inline_mathop(rint, int,)
+__inline_mathop(log1p, lognp1,)
 # endif
 
 # ifdef __USE_MISC
-__inline_mathop(significand, getman)
+__inline_mathop(significand, getman,)
 # endif
 
 # ifdef __USE_ISOC99
-__inline_mathop(trunc, intrz)
+__inline_mathop(trunc, intrz, __attribute__ ((__const__)))
 # endif
 
 #endif /* !__NO_MATH_INLINES && __OPTIMIZE__ */
@@ -121,7 +121,8 @@ __inline_mathop(trunc, intrz)
    that adds the suffix for the function names.  */
 
 #define __inline_functions(float_type, m)				  \
-__m81_defun (float_type, m(__floor), (float_type __x))			  \
+__m81_defun (float_type, m(__floor), (float_type __x),			  \
+	     __attribute__ ((__const__)))				  \
 {									  \
   float_type __result;							  \
   unsigned long int __ctrl_reg;						  \
@@ -137,7 +138,8 @@ __m81_defun (float_type, m(__floor), (float_type __x))			  \
   return __result;							  \
 }									  \
 									  \
-__m81_defun (float_type, m(__ceil), (float_type __x))			  \
+__m81_defun (float_type, m(__ceil), (float_type __x),			  \
+	     __attribute__ ((__const__)))				  \
 {									  \
   float_type __result;							  \
   unsigned long int __ctrl_reg;						  \
@@ -166,7 +168,8 @@ __inline_functions(long double, __CONCAT_l)
 #ifdef __USE_MISC
 
 # define __inline_functions(float_type, m)				  \
-__m81_defun (int, m(__isinf), (float_type __value))			  \
+__m81_defun (int, m(__isinf), (float_type __value),			  \
+	     __attribute__ ((__const__)))				  \
 {									  \
   /* There is no branch-condition for infinity,				  \
      so we must extract and examine the condition codes manually.  */	  \
@@ -176,7 +179,8 @@ __m81_defun (int, m(__isinf), (float_type __value))			  \
   return (__fpsr & (2 << 24)) ? (__fpsr & (8 << 24) ? -1 : 1) : 0;	  \
 }									  \
 									  \
-__m81_defun (int, m(__finite), (float_type __value))			  \
+__m81_defun (int, m(__finite), (float_type __value),			  \
+	     __attribute__ ((__const__)))				  \
 {									  \
   /* There is no branch-condition for infinity, so we must extract and	  \
      examine the condition codes manually.  */				  \
@@ -187,7 +191,7 @@ __m81_defun (int, m(__finite), (float_type __value))			  \
 }									  \
 									  \
 __m81_defun (float_type, m(__scalbn),					  \
-	     (float_type __x, int __n))					  \
+	     (float_type __x, int __n),)				  \
 {									  \
   float_type __result;							  \
   __asm __volatile__  ("fscale%.l %1, %0" : "=f" (__result)		  \
@@ -205,7 +209,8 @@ __inline_functions(long double, __CONCAT_l)
 #if defined __USE_MISC || defined __USE_XOPEN
 
 # define __inline_functions(float_type, m)				  \
-__m81_defun (int, m(__isnan), (float_type __value))		  	  \
+__m81_defun (int, m(__isnan), (float_type __value),			  \
+	     __attribute__ ((__const__)))			  	  \
 {									  \
   char __result;							  \
   __asm ("ftst%.x %1\n"							  \
@@ -226,12 +231,12 @@ __inline_functions(long double, __CONCAT_l)
 
 # define __inline_functions(float_type, m)				  \
 __m81_defun (float_type, m(__scalbln),					  \
-	     (float_type __x, long int __n))				  \
+	     (float_type __x, long int __n),)				  \
 {									  \
   return m(__scalbn) (__x, __n);					  \
 }									  \
 									  \
-__m81_defun (float_type, m(__nearbyint), (float_type __x))		  \
+__m81_defun (float_type, m(__nearbyint), (float_type __x),)		  \
 {									  \
   float_type __result;							  \
   unsigned long int __ctrl_reg;						  \
@@ -245,7 +250,7 @@ __m81_defun (float_type, m(__nearbyint), (float_type __x))		  \
   return __result;							  \
 }									  \
 									  \
-__m81_defun (long int, m(__lrint), (float_type __x))			  \
+__m81_defun (long int, m(__lrint), (float_type __x),)			  \
 {									  \
   long int __result;							  \
   __asm __volatile__ ("fmove%.l %1, %0" : "=dm" (__result) : "f" (__x));  \
@@ -305,7 +310,7 @@ __inline_forward_c(double,ceil, (double __x), (__x))
 __inline_forward_c(int,isinf, (double __value), (__value))
 #  endif
 __inline_forward_c(int,finite, (double __value), (__value))
-__inline_forward_c(double,scalbn, (double __x, int __n), (__x, __n))
+__inline_forward(double,scalbn, (double __x, int __n), (__x, __n))
 # endif
 # if defined __USE_MISC || defined __USE_XOPEN
 #  ifndef __USE_ISOC99 /* Conflict with macro of same name.  */
@@ -313,9 +318,9 @@ __inline_forward_c(int,isnan, (double __value), (__value))
 #  endif
 # endif
 # ifdef __USE_ISOC99
-__inline_forward_c(double,scalbln, (double __x, long int __n), (__x, __n))
-__inline_forward_c(double,nearbyint, (double __value), (__value))
-__inline_forward_c(long int,lrint, (double __value), (__value))
+__inline_forward(double,scalbln, (double __x, long int __n), (__x, __n))
+__inline_forward(double,nearbyint, (double __value), (__value))
+__inline_forward(long int,lrint, (double __value), (__value))
 # endif
 # ifdef __USE_GNU
 __inline_forward(void,sincos, (double __x, double *__sinx, double *__cosx),
@@ -329,13 +334,13 @@ __inline_forward_c(float,ceilf, (float __x), (__x))
 #  ifdef __USE_MISC
 __inline_forward_c(int,isinff, (float __value), (__value))
 __inline_forward_c(int,finitef, (float __value), (__value))
-__inline_forward_c(float,scalbnf, (float __x, int __n), (__x, __n))
+__inline_forward(float,scalbnf, (float __x, int __n), (__x, __n))
 __inline_forward_c(int,isnanf, (float __value), (__value))
 #  endif
 # ifdef __USE_ISOC99
-__inline_forward_c(float,scalblnf, (float __x, long int __n), (__x, __n))
-__inline_forward_c(float,nearbyintf, (float __value), (__value))
-__inline_forward_c(long int,lrintf, (float __value), (__value))
+__inline_forward(float,scalblnf, (float __x, long int __n), (__x, __n))
+__inline_forward(float,nearbyintf, (float __value), (__value))
+__inline_forward(long int,lrintf, (float __value), (__value))
 # endif
 # ifdef __USE_GNU
 __inline_forward(void,sincosf, (float __x, float *__sinx, float *__cosx),
@@ -347,14 +352,14 @@ __inline_forward_c(long double,ceill, (long double __x), (__x))
 # ifdef __USE_MISC
 __inline_forward_c(int,isinfl, (long double __value), (__value))
 __inline_forward_c(int,finitel, (long double __value), (__value))
-__inline_forward_c(long double,scalbnl, (long double __x, int __n), (__x, __n))
+__inline_forward(long double,scalbnl, (long double __x, int __n), (__x, __n))
 __inline_forward_c(int,isnanl, (long double __value), (__value))
 # endif
 # ifdef __USE_ISOC99
-__inline_forward_c(long double,scalblnl, (long double __x, long int __n),
-		   (__x, __n))
-__inline_forward_c(long double,nearbyintl, (long double __value), (__value))
-__inline_forward_c(long int,lrintl, (long double __value), (__value))
+__inline_forward(long double,scalblnl, (long double __x, long int __n),
+		 (__x, __n))
+__inline_forward(long double,nearbyintl, (long double __value), (__value))
+__inline_forward(long int,lrintl, (long double __value), (__value))
 # endif
 # ifdef __USE_GNU
 __inline_forward(void,sincosl,
diff --git a/sysdeps/m68k/m680x0/fpu/mathimpl.h b/sysdeps/m68k/m680x0/fpu/mathimpl.h
index 653df96..2be4e1a 100644
--- a/sysdeps/m68k/m680x0/fpu/mathimpl.h
+++ b/sysdeps/m68k/m680x0/fpu/mathimpl.h
@@ -20,27 +20,27 @@
 /* This file contains the definitions of the inline math functions that
    are only used internally inside libm, not visible to the user.  */
 
-__inline_mathop	(__ieee754_acos, acos)
-__inline_mathop	(__ieee754_asin, asin)
-__inline_mathop	(__ieee754_cosh, cosh)
-__inline_mathop	(__ieee754_sinh, sinh)
-__inline_mathop	(__ieee754_exp, etox)
-__inline_mathop	(__ieee754_exp2, twotox)
-__inline_mathop	(__ieee754_exp10, tentox)
-__inline_mathop	(__ieee754_log10, log10)
-__inline_mathop	(__ieee754_log2, log2)
-__inline_mathop	(__ieee754_log, logn)
-__inline_mathop	(__ieee754_sqrt, sqrt)
-__inline_mathop	(__ieee754_atanh, atanh)
+__inline_mathop	(__ieee754_acos, acos,)
+__inline_mathop	(__ieee754_asin, asin,)
+__inline_mathop	(__ieee754_cosh, cosh,)
+__inline_mathop	(__ieee754_sinh, sinh,)
+__inline_mathop	(__ieee754_exp, etox,)
+__inline_mathop	(__ieee754_exp2, twotox,)
+__inline_mathop	(__ieee754_exp10, tentox,)
+__inline_mathop	(__ieee754_log10, log10,)
+__inline_mathop	(__ieee754_log2, log2,)
+__inline_mathop	(__ieee754_log, logn,)
+__inline_mathop	(__ieee754_sqrt, sqrt,)
+__inline_mathop	(__ieee754_atanh, atanh,)
 
-__m81_defun (double, __ieee754_remainder, (double __x, double __y))
+__m81_defun (double, __ieee754_remainder, (double __x, double __y),)
 {
   double __result;
   __asm ("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
   return __result;
 }
 
-__m81_defun (float, __ieee754_remainderf, (float __x, float __y))
+__m81_defun (float, __ieee754_remainderf, (float __x, float __y),)
 {
   float __result;
   __asm ("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
@@ -48,21 +48,21 @@ __m81_defun (float, __ieee754_remainderf, (float __x, float __y))
 }
 
 __m81_defun (long double,
-	     __ieee754_remainderl, (long double __x, long double __y))
+	     __ieee754_remainderl, (long double __x, long double __y),)
 {
   long double __result;
   __asm ("frem%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
   return __result;
 }
 
-__m81_defun (double, __ieee754_fmod, (double __x, double __y))
+__m81_defun (double, __ieee754_fmod, (double __x, double __y),)
 {
   double __result;
   __asm ("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
   return __result;
 }
 
-__m81_defun (float, __ieee754_fmodf, (float __x, float __y))
+__m81_defun (float, __ieee754_fmodf, (float __x, float __y),)
 {
   float __result;
   __asm ("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));
@@ -70,7 +70,7 @@ __m81_defun (float, __ieee754_fmodf, (float __x, float __y))
 }
 
 __m81_defun (long double,
-	     __ieee754_fmodl, (long double __x, long double __y))
+	     __ieee754_fmodl, (long double __x, long double __y),)
 {
   long double __result;
   __asm ("fmod%.x %1, %0" : "=f" (__result) : "f" (__y), "0" (__x));