Fix libm feraiseexcept namespace (bug 17723).

Various C90 and UNIX98 libm functions call feraiseexcept, which is not
in those standards.  This causes linknamespace test failures - except
on x86 / x86_64, where feraiseexcept is inline (for the relevant
constant arguments) in bits/fenv.h.

This patch fixes this by making those functions call __feraiseexcept
instead.  All changes are applied to all architectures rather than
considering the possibility that some might not be needed in some
cases (e.g. x86) as it seems most maintainable to keep architectures
consistent.

Where __feraiseexcept does not exist, it is added, with feraiseexcept
made a weak alias; where it is a strong alias, it is made weak.
libm_hidden_def / libm_hidden_proto are used with __feraiseexcept
(this might in some cases improve code generation for existing calls
to __feraiseexcept in some code on some architectures).  Where there
are dummy feraiseexcept macros (on architectures without
floating-point exceptions support, to avoid compile errors from
references to undefined FE_* macros), corresponding dummy
__feraiseexcept macros are added.  And on x86, to ensure
__feraiseexcept calls still get inlined, the inline function in
bits/fenv.h is refactored so that most of it can be reused in an
inline __feraiseexcept in a separate include/bits/fenv.h.

Calls are changed in C90/UNIX98 functions, but generally not in
functions missing from those standards.  They are also changed in
libc_fe* functions (on the basis that those might be used in any libm
function), and in feupdateenv (on the same basis - may be used, via
default libc_*, in any libm function - of course feupdateenv will need
changing to __feupdateenv in a subsequent patch to make that fully
namespace-clean).

No __feraiseexcept is added corresponding to the feraiseexcept in
powerpc bits/fenvinline.h, because that macro definition is
conditional on !defined __NO_MATH_INLINES, and glibc libm is built
with -D__NO_MATH_INLINES, so changing internal calls to use
__feraiseexcept should make no difference.

Tested for x86_64 (testsuite; the only change in disassembly of
installed shared libraries is a slight code reordering in clog10, of
no apparent significance).  Also tested for MIPS, where (in the
configuration tested) it eliminates math.h linknamespace failures for
n32 and n64 (some for o32 remain because of other issues).

	[BZ #17723]
	* include/fenv.h (__feraiseexcept): Use libm_hidden_proto.
	* math/fraiseexcpt.c (__feraiseexcept): Use libm_hidden_def.
	* sysdeps/aarch64/fpu/fraiseexcpt.c (feraiseexcept): Rename to
	__feraiseexcept and define as weak alias of __feraiseexcept.  Use
	libm_hidden_weak.
	* sysdeps/arm/fraiseexcpt.c (feraiseexcept): Likewise.
	* sysdeps/hppa/fpu/fraiseexcpt.c (feraiseexcept): Likewise.
	* sysdeps/i386/fpu/fraiseexcpt.c (__feraiseexcept): Use
	libm_hidden_def.
	* sysdeps/ia64/fpu/fraiseexcpt.c (feraiseexcept): Rename to
	__feraiseexcept and define as weak alias of __feraiseexcept.  Use
	libm_hidden_weak.
	* sysdeps/m68k/coldfire/fpu/fraiseexcpt.c (feraiseexcept):
	Likewise.
	* sysdeps/microblaze/math_private.h (__feraiseexcept): New macro.
	* sysdeps/mips/fpu/fraiseexcpt.c (feraiseexcept): Rename to
	__feraiseexcept and define as weak alias of __feraiseexcept.  Use
	libm_hidden_weak.
	* sysdeps/powerpc/fpu/fraiseexcpt.c (__feraiseexcept): Use
	libm_hidden_def.
	* sysdeps/powerpc/nofpu/fraiseexcpt.c (__feraiseexcept): Likewise.
	* sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcpt.c
	(__feraiseexcept): Likewise.
	* sysdeps/s390/fpu/fraiseexcpt.c (feraiseexcept): Rename to
	__feraiseexcept and define as weak alias of __feraiseexcept.  Use
	libm_hidden_weak.
	* sysdeps/sh/sh4/fpu/fraiseexcpt.c (feraiseexcept): Likewise.
	* sysdeps/sparc/fpu/fraiseexcpt.c (__feraiseexcept): Use
	libm_hidden_def.
	* sysdeps/tile/math_private.h (__feraiseexcept): New macro.
	* sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S (__feraiseexcept):
	Use libm_hidden_def.
	* sysdeps/x86_64/fpu/fraiseexcpt.c (__feraiseexcept): Use
	libm_hidden_def.
	(feraiseexcept): Define as weak not strong alias.  Use
	libm_hidden_weak.
	* sysdeps/x86/fpu/bits/fenv.h (__feraiseexcept_invalid_divbyzero):
	New inline function.  Factored out of ...
	(feraiseexcept): ... here.  Use __feraiseexcept_invalid_divbyzero.
	* sysdeps/x86/fpu/include/bits/fenv.h: New file.
	* math/e_scalb.c (invalid_fn): Call __feraiseexcept instead of
	feraiseexcept.
	* math/w_acos.c (__acos): Likewise.
	* math/w_asin.c (__asin): Likewise.
	* math/w_ilogb.c (__ilogb): Likewise.
	* math/w_j0.c (y0): Likewise.
	* math/w_j1.c (y1): Likewise.
	* math/w_jn.c (yn): Likewise.
	* math/w_log.c (__log): Likewise.
	* math/w_log10.c (__log10): Likewise.
	* sysdeps/aarch64/fpu/feupdateenv.c (feupdateenv): Likewise.
	* sysdeps/aarch64/fpu/math_private.h
	(libc_feupdateenv_test_aarch64): Likewise.
	* sysdeps/alpha/fpu/feupdateenv.c (__feupdateenv): Likewise.
	* sysdeps/arm/fenv_private.h (libc_feupdateenv_test_vfp): Likewise.
	* sysdeps/arm/feupdateenv.c (feupdateenv): Likewise.
	* sysdeps/ia64/fpu/feupdateenv.c (feupdateenv): Likewise.
	* sysdeps/m68k/fpu/feupdateenv.c (__feupdateenv): Likewise.
	* sysdeps/mips/fpu/feupdateenv.c (feupdateenv): Likewise.
	* sysdeps/powerpc/fpu/e_sqrt.c (__slow_ieee754_sqrt): Likewise.
	* sysdeps/s390/fpu/feupdateenv.c (feupdateenv): Likewise.
	* sysdeps/sh/sh4/fpu/feupdateenv.c (feupdateenv): Likewise.
	* sysdeps/sparc/fpu/feupdateenv.c (__feupdateenv): Likewise.

31 files changed, 127 insertions, 56 deletions

diff --git a/sysdeps/aarch64/fpu/feupdateenv.c b/sysdeps/aarch64/fpu/feupdateenv.c
index ac2f6fe..3c675c3 100644
--- a/sysdeps/aarch64/fpu/feupdateenv.c
+++ b/sysdeps/aarch64/fpu/feupdateenv.c
@@ -45,7 +45,7 @@ feupdateenv (const fenv_t *envp)
         _FPU_SETFPSR (fpsr_new);
 
       if (excepts & (fpcr_new >> FE_EXCEPT_SHIFT))
-        return feraiseexcept (excepts);
+        return __feraiseexcept (excepts);
 
       return 0;
     }
@@ -80,7 +80,7 @@ feupdateenv (const fenv_t *envp)
     }
 
   if (excepts & (fpcr_new >> FE_EXCEPT_SHIFT))
-    return feraiseexcept (excepts);
+    return __feraiseexcept (excepts);
 
   return 0;
 }
diff --git a/sysdeps/aarch64/fpu/fraiseexcpt.c b/sysdeps/aarch64/fpu/fraiseexcpt.c
index 77c6ca7..3be8fa3 100644
--- a/sysdeps/aarch64/fpu/fraiseexcpt.c
+++ b/sysdeps/aarch64/fpu/fraiseexcpt.c
@@ -21,7 +21,7 @@
 #include <float.h>
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   int fpsr;
   const float fp_zero = 0.0;
@@ -88,4 +88,6 @@ feraiseexcept (int excepts)
 
   return 0;
 }
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/aarch64/fpu/math_private.h b/sysdeps/aarch64/fpu/math_private.h
index b13c030..514339f 100644
--- a/sysdeps/aarch64/fpu/math_private.h
+++ b/sysdeps/aarch64/fpu/math_private.h
@@ -159,7 +159,7 @@ libc_feupdateenv_test_aarch64 (const fenv_t *envp, int ex)
 
   /* Raise the exceptions if enabled in the new FP state.  */
   if (__glibc_unlikely (excepts & (new_fpcr >> FE_EXCEPT_SHIFT)))
-    feraiseexcept (excepts);
+    __feraiseexcept (excepts);
 
   return excepts & ex;
 }
diff --git a/sysdeps/alpha/fpu/feupdateenv.c b/sysdeps/alpha/fpu/feupdateenv.c
index af1f630..cd192ca2 100644
--- a/sysdeps/alpha/fpu/feupdateenv.c
+++ b/sysdeps/alpha/fpu/feupdateenv.c
@@ -33,7 +33,7 @@ __feupdateenv (const fenv_t *envp)
   /* Raise the saved exception.  Incidently for us the implementation
      defined format of the values in objects of type fexcept_t is the
      same as the ones specified using the FE_* constants.  */
-  feraiseexcept (tmp & SWCR_STATUS_MASK);
+  __feraiseexcept (tmp & SWCR_STATUS_MASK);
 
   /* Success.  */
   return 0;
diff --git a/sysdeps/arm/fenv_private.h b/sysdeps/arm/fenv_private.h
index 743df18..5fca507 100644
--- a/sysdeps/arm/fenv_private.h
+++ b/sysdeps/arm/fenv_private.h
@@ -129,7 +129,7 @@ libc_feupdateenv_test_vfp (const fenv_t *envp, int ex)
 
   /* Raise the exceptions if enabled in the new FP state.  */
   if (__glibc_unlikely (excepts & (new_fpscr >> FE_EXCEPT_SHIFT)))
-    feraiseexcept (excepts);
+    __feraiseexcept (excepts);
 
   return excepts & ex;
 }
diff --git a/sysdeps/arm/feupdateenv.c b/sysdeps/arm/feupdateenv.c
index f9a1f28..f5d914f 100644
--- a/sysdeps/arm/feupdateenv.c
+++ b/sysdeps/arm/feupdateenv.c
@@ -46,7 +46,7 @@ feupdateenv (const fenv_t *envp)
 
       /* Raise the exceptions if enabled in the new FP state.  */
       if (excepts & (new_fpscr >> FE_EXCEPT_SHIFT))
-	return feraiseexcept (excepts);
+	return __feraiseexcept (excepts);
 
       return 0;
     }
@@ -69,7 +69,7 @@ feupdateenv (const fenv_t *envp)
 
   /* Raise the exceptions if enabled in the new FP state.  */
   if (excepts & (new_fpscr >> FE_EXCEPT_SHIFT))
-    return feraiseexcept (excepts);
+    return __feraiseexcept (excepts);
 
   return 0;
 }
diff --git a/sysdeps/arm/fraiseexcpt.c b/sysdeps/arm/fraiseexcpt.c
index 91ec86f..7c02418 100644
--- a/sysdeps/arm/fraiseexcpt.c
+++ b/sysdeps/arm/fraiseexcpt.c
@@ -23,7 +23,7 @@
 
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   /* Fail if a VFP unit isn't present unless nothing needs to be done.  */
   if (!ARM_HAVE_VFP)
@@ -102,4 +102,6 @@ feraiseexcept (int excepts)
       return 0;
     }
 }
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/hppa/fpu/fraiseexcpt.c b/sysdeps/hppa/fpu/fraiseexcpt.c
index 74e9350..920208e 100644
--- a/sysdeps/hppa/fpu/fraiseexcpt.c
+++ b/sysdeps/hppa/fpu/fraiseexcpt.c
@@ -25,7 +25,7 @@
    page 10-5 "Delayed Trapping" in the PA-RISC 2.0 Architecture manual */
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   /* Raise exceptions represented by EXCEPTS.  But we must raise only one
      signal at a time.  It is important that if the overflow/underflow
@@ -98,4 +98,6 @@ feraiseexcept (int excepts)
   /* Success.  */
   return 0;
 }
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/i386/fpu/fraiseexcpt.c b/sysdeps/i386/fpu/fraiseexcpt.c
index 076477f..b663198 100644
--- a/sysdeps/i386/fpu/fraiseexcpt.c
+++ b/sysdeps/i386/fpu/fraiseexcpt.c
@@ -119,5 +119,6 @@ strong_alias (__feraiseexcept, __old_feraiseexcept)
 compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
 #endif
 
+libm_hidden_def (__feraiseexcept)
 libm_hidden_ver (__feraiseexcept, feraiseexcept)
 versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
diff --git a/sysdeps/ia64/fpu/feupdateenv.c b/sysdeps/ia64/fpu/feupdateenv.c
index 2318561..0da8793 100644
--- a/sysdeps/ia64/fpu/feupdateenv.c
+++ b/sysdeps/ia64/fpu/feupdateenv.c
@@ -32,7 +32,7 @@ feupdateenv (const fenv_t *envp)
   fesetenv (envp);
 
   /* Raise the saved exceptions.  */
-  feraiseexcept ((int) (fpsr >> 13) & FE_ALL_EXCEPT);
+  __feraiseexcept ((int) (fpsr >> 13) & FE_ALL_EXCEPT);
 
   /* Success.  */
   return 0;
diff --git a/sysdeps/ia64/fpu/fraiseexcpt.c b/sysdeps/ia64/fpu/fraiseexcpt.c
index 7b70b2e..aa8525c 100644
--- a/sysdeps/ia64/fpu/fraiseexcpt.c
+++ b/sysdeps/ia64/fpu/fraiseexcpt.c
@@ -24,7 +24,7 @@
 #include <unistd.h>
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   double tmp;
   double dummy;
@@ -75,4 +75,6 @@ feraiseexcept (int excepts)
   /* Success.  */
   return 0;
 }
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/m68k/coldfire/fpu/fraiseexcpt.c b/sysdeps/m68k/coldfire/fpu/fraiseexcpt.c
index 3d75deb..5b3e0483 100644
--- a/sysdeps/m68k/coldfire/fpu/fraiseexcpt.c
+++ b/sysdeps/m68k/coldfire/fpu/fraiseexcpt.c
@@ -21,7 +21,7 @@
 #include <math.h>
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   /* Raise exceptions represented by EXCEPTS.  But we must raise only one
      signal at a time.  It is important that if the overflow/underflow
@@ -63,4 +63,6 @@ feraiseexcept (int excepts)
   /* Success.  */
   return 0;
 }
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/m68k/fpu/feupdateenv.c b/sysdeps/m68k/fpu/feupdateenv.c
index 3ed7ed0..f3652e0 100644
--- a/sysdeps/m68k/fpu/feupdateenv.c
+++ b/sysdeps/m68k/fpu/feupdateenv.c
@@ -34,7 +34,7 @@ __feupdateenv (const fenv_t *envp)
   /* Raise the saved exception.  Incidently for us the implementation
      defined format of the values in objects of type fexcept_t is the
      same as the ones specified using the FE_* constants.  */
-  feraiseexcept ((int) fpsr);
+  __feraiseexcept ((int) fpsr);
 
   /* Success.  */
   return 0;
diff --git a/sysdeps/microblaze/math_private.h b/sysdeps/microblaze/math_private.h
index 39b7172..2cfaaca 100644
--- a/sysdeps/microblaze/math_private.h
+++ b/sysdeps/microblaze/math_private.h
@@ -28,6 +28,7 @@
 #include_next <math_private.h>
 
 #define feraiseexcept(excepts)                 ({ 0; })
+#define __feraiseexcept(excepts)               ({ 0; })
 #define feclearexcept(exc)                     ({ 0; })
 
 #endif
diff --git a/sysdeps/mips/fpu/feupdateenv.c b/sysdeps/mips/fpu/feupdateenv.c
index 8b2572d..78ca063 100644
--- a/sysdeps/mips/fpu/feupdateenv.c
+++ b/sysdeps/mips/fpu/feupdateenv.c
@@ -35,7 +35,7 @@ feupdateenv (const fenv_t *envp)
   /* Raise the safed exception.  Incidently for us the implementation
      defined format of the values in objects of type fexcept_t is the
      same as the ones specified using the FE_* constants.  */
-  feraiseexcept (temp);
+  __feraiseexcept (temp);
 
   /* Success.  */
   return 0;
diff --git a/sysdeps/mips/fpu/fraiseexcpt.c b/sysdeps/mips/fpu/fraiseexcpt.c
index ab84fe1..55d7962 100644
--- a/sysdeps/mips/fpu/fraiseexcpt.c
+++ b/sysdeps/mips/fpu/fraiseexcpt.c
@@ -22,7 +22,7 @@
 #include <fpu_control.h>
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   fpu_control_t cw;
 
@@ -43,4 +43,6 @@ feraiseexcept (int excepts)
   return 0;
 }
 
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/powerpc/fpu/e_sqrt.c b/sysdeps/powerpc/fpu/e_sqrt.c
index 0368e57..a2d9517 100644
--- a/sysdeps/powerpc/fpu/e_sqrt.c
+++ b/sysdeps/powerpc/fpu/e_sqrt.c
@@ -142,12 +142,12 @@ __slow_ieee754_sqrt (double x)
       /* For some reason, some PowerPC32 processors don't implement
 	 FE_INVALID_SQRT.  */
 #ifdef FE_INVALID_SQRT
-      feraiseexcept (FE_INVALID_SQRT);
+      __feraiseexcept (FE_INVALID_SQRT);
 
       fenv_union_t u = { .fenv = fegetenv_register () };
       if ((u.l & FE_INVALID) == 0)
 #endif
-	feraiseexcept (FE_INVALID);
+	__feraiseexcept (FE_INVALID);
       x = a_nan.value;
     }
   return f_wash (x);
diff --git a/sysdeps/powerpc/fpu/fraiseexcpt.c b/sysdeps/powerpc/fpu/fraiseexcpt.c
index 8fb6dfe..37ff5d8 100644
--- a/sysdeps/powerpc/fpu/fraiseexcpt.c
+++ b/sysdeps/powerpc/fpu/fraiseexcpt.c
@@ -63,5 +63,6 @@ strong_alias (__feraiseexcept, __old_feraiseexcept)
 compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
 #endif
 
+libm_hidden_def (__feraiseexcept)
 libm_hidden_ver (__feraiseexcept, feraiseexcept)
 versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
diff --git a/sysdeps/powerpc/nofpu/fraiseexcpt.c b/sysdeps/powerpc/nofpu/fraiseexcpt.c
index 097502e..e390363 100644
--- a/sysdeps/powerpc/nofpu/fraiseexcpt.c
+++ b/sysdeps/powerpc/nofpu/fraiseexcpt.c
@@ -38,5 +38,6 @@ strong_alias (__feraiseexcept, __old_feraiseexcept)
 compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
 #endif
 
+libm_hidden_def (__feraiseexcept)
 libm_hidden_ver (__feraiseexcept, feraiseexcept)
 versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcpt.c b/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcpt.c
index 70fe683..9a461eb 100644
--- a/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcpt.c
+++ b/sysdeps/powerpc/powerpc32/e500/nofpu/fraiseexcpt.c
@@ -36,5 +36,6 @@ strong_alias (__feraiseexcept, __old_feraiseexcept)
 compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
 #endif
 
+libm_hidden_def (__feraiseexcept)
 libm_hidden_ver (__feraiseexcept, feraiseexcept)
 versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
diff --git a/sysdeps/s390/fpu/feupdateenv.c b/sysdeps/s390/fpu/feupdateenv.c
index 710893a..4e1b52c 100644
--- a/sysdeps/s390/fpu/feupdateenv.c
+++ b/sysdeps/s390/fpu/feupdateenv.c
@@ -32,7 +32,7 @@ feupdateenv (const fenv_t *envp)
   /* Raise the exceptions since the last call to feholdenv  */
   /* re install saved environment.  */
   fesetenv (envp);
-  feraiseexcept ((int) temp);
+  __feraiseexcept ((int) temp);
 
   /* Success.  */
   return 0;
diff --git a/sysdeps/s390/fpu/fraiseexcpt.c b/sysdeps/s390/fpu/fraiseexcpt.c
index d99f939..c1f4b3e 100644
--- a/sysdeps/s390/fpu/fraiseexcpt.c
+++ b/sysdeps/s390/fpu/fraiseexcpt.c
@@ -37,7 +37,7 @@ fexceptadd (float d, float e)
 
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   /* Raise exceptions represented by EXPECTS.  But we must raise only
      one signal at a time.  It is important that if the overflow/underflow
@@ -69,4 +69,6 @@ feraiseexcept (int excepts)
   /* Success.  */
   return 0;
 }
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/sh/sh4/fpu/feupdateenv.c b/sysdeps/sh/sh4/fpu/feupdateenv.c
index f06d80a..36ef335 100644
--- a/sysdeps/sh/sh4/fpu/feupdateenv.c
+++ b/sysdeps/sh/sh4/fpu/feupdateenv.c
@@ -32,7 +32,7 @@ feupdateenv (const fenv_t *envp)
     defined format of the values in objects of type fexcept_t is the
     same as the ones specified using the FE_* constants. */
   fesetenv (envp);
-  feraiseexcept ((int) temp);
+  __feraiseexcept ((int) temp);
 
   return 0;
 }
diff --git a/sysdeps/sh/sh4/fpu/fraiseexcpt.c b/sysdeps/sh/sh4/fpu/fraiseexcpt.c
index 944da33..e89ca29 100644
--- a/sysdeps/sh/sh4/fpu/fraiseexcpt.c
+++ b/sysdeps/sh/sh4/fpu/fraiseexcpt.c
@@ -23,7 +23,7 @@
 #include <math.h>
 
 int
-feraiseexcept (int excepts)
+__feraiseexcept (int excepts)
 {
   if (excepts == 0)
     return 0;
@@ -70,4 +70,6 @@ feraiseexcept (int excepts)
 
   return 0;
 }
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)
diff --git a/sysdeps/sparc/fpu/feupdateenv.c b/sysdeps/sparc/fpu/feupdateenv.c
index 79cb1db..3c176b5 100644
--- a/sysdeps/sparc/fpu/feupdateenv.c
+++ b/sysdeps/sparc/fpu/feupdateenv.c
@@ -34,7 +34,7 @@ __feupdateenv (const fenv_t *envp)
   /* Raise the safed exception.  Incidently for us the implementation
      defined format of the values in objects of type fexcept_t is the
      same as the ones specified using the FE_* constants.  */
-  feraiseexcept ((int) tmp);
+  __feraiseexcept ((int) tmp);
 
   /* Success.  */
   return 0;
diff --git a/sysdeps/sparc/fpu/fraiseexcpt.c b/sysdeps/sparc/fpu/fraiseexcpt.c
index e1c63dd..43b0bac 100644
--- a/sysdeps/sparc/fpu/fraiseexcpt.c
+++ b/sysdeps/sparc/fpu/fraiseexcpt.c
@@ -86,5 +86,6 @@ strong_alias (__feraiseexcept, __old_feraiseexcept)
 compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
 #endif
 
+libm_hidden_def (__feraiseexcept)
 libm_hidden_ver (__feraiseexcept, feraiseexcept)
 versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
diff --git a/sysdeps/tile/math_private.h b/sysdeps/tile/math_private.h
index a58eafa..035a83f 100644
--- a/sysdeps/tile/math_private.h
+++ b/sysdeps/tile/math_private.h
@@ -26,6 +26,7 @@
 #include_next <math_private.h>
 
 #define feraiseexcept(excepts)			({ 0; })
+#define __feraiseexcept(excepts)		({ 0; })
 #define feclearexcept(exc)			({ 0; })
 #define fetestexcept(exc)			({ 0; })
 extern inline int fegetenv (fenv_t *__e)	{ return 0; }
diff --git a/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S b/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S
index b8f344e..4e1cc57 100644
--- a/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S
+++ b/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S
@@ -52,6 +52,7 @@ END(__feraiseexcept)
 strong_alias (__feraiseexcept, __old_feraiseexcept)
 compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
 # endif
+libm_hidden_def (__feraiseexcept)
 libm_hidden_ver (__feraiseexcept, feraiseexcept)
 versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
 #endif
diff --git a/sysdeps/x86/fpu/bits/fenv.h b/sysdeps/x86/fpu/bits/fenv.h
index d21b312..791ade4 100644
--- a/sysdeps/x86/fpu/bits/fenv.h
+++ b/sysdeps/x86/fpu/bits/fenv.h
@@ -107,39 +107,43 @@ __BEGIN_DECLS
 
 /* Optimized versions.  */
 extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), feraiseexcept);
-__extern_inline int
-__NTH (feraiseexcept (int __excepts))
+__extern_always_inline void
+__NTH (__feraiseexcept_invalid_divbyzero (int __excepts))
 {
-  if (__builtin_constant_p (__excepts)
-      && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0)
+  if ((FE_INVALID & __excepts) != 0)
     {
-      if ((FE_INVALID & __excepts) != 0)
-	{
-	  /* One example of an invalid operation is 0.0 / 0.0.  */
-	  float __f = 0.0;
+      /* One example of an invalid operation is 0.0 / 0.0.  */
+      float __f = 0.0;
 
 # ifdef __SSE_MATH__
-	  __asm__ __volatile__ ("divss %0, %0 " : : "x" (__f));
+      __asm__ __volatile__ ("divss %0, %0 " : : "x" (__f));
 # else
-	  __asm__ __volatile__ ("fdiv %%st, %%st(0); fwait"
-				: "=t" (__f) : "0" (__f));
+      __asm__ __volatile__ ("fdiv %%st, %%st(0); fwait"
+			    : "=t" (__f) : "0" (__f));
 # endif
-	  (void) &__f;
-	}
-      if ((FE_DIVBYZERO & __excepts) != 0)
-	{
-	  float __f = 1.0;
-	  float __g = 0.0;
+      (void) &__f;
+    }
+  if ((FE_DIVBYZERO & __excepts) != 0)
+    {
+      float __f = 1.0;
+      float __g = 0.0;
 
 # ifdef __SSE_MATH__
-	  __asm__ __volatile__ ("divss %1, %0" : : "x" (__f), "x" (__g));
+      __asm__ __volatile__ ("divss %1, %0" : : "x" (__f), "x" (__g));
 # else
-	  __asm__ __volatile__ ("fdivp %%st, %%st(1); fwait"
-				: "=t" (__f) : "0" (__f), "u" (__g) : "st(1)");
+      __asm__ __volatile__ ("fdivp %%st, %%st(1); fwait"
+			    : "=t" (__f) : "0" (__f), "u" (__g) : "st(1)");
 # endif
-	  (void) &__f;
-	}
-
+      (void) &__f;
+    }
+}
+__extern_inline int
+__NTH (feraiseexcept (int __excepts))
+{
+  if (__builtin_constant_p (__excepts)
+      && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0)
+    {
+      __feraiseexcept_invalid_divbyzero (__excepts);
       return 0;
     }
 
diff --git a/sysdeps/x86/fpu/include/bits/fenv.h b/sysdeps/x86/fpu/include/bits/fenv.h
new file mode 100644
index 0000000..f5d062a
--- /dev/null
+++ b/sysdeps/x86/fpu/include/bits/fenv.h
@@ -0,0 +1,42 @@
+/* Wrapper for x86 bits/fenv.h for use when building glibc.
+   Copyright (C) 1997-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include_next <bits/fenv.h>
+
+/* Ensure __feraiseexcept calls in glibc are optimized the same as
+   feraiseexcept calls.  */
+
+#ifdef __USE_EXTERN_INLINES
+__BEGIN_DECLS
+
+extern int __REDIRECT_NTH (____feraiseexcept_renamed, (int), __feraiseexcept);
+__extern_inline int
+__NTH (__feraiseexcept (int __excepts))
+{
+  if (__builtin_constant_p (__excepts)
+      && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0)
+    {
+      __feraiseexcept_invalid_divbyzero (__excepts);
+      return 0;
+    }
+
+  return ____feraiseexcept_renamed (__excepts);
+}
+
+__END_DECLS
+#endif
diff --git a/sysdeps/x86_64/fpu/fraiseexcpt.c b/sysdeps/x86_64/fpu/fraiseexcpt.c
index 5aeaf30..aa8ce5d 100644
--- a/sysdeps/x86_64/fpu/fraiseexcpt.c
+++ b/sysdeps/x86_64/fpu/fraiseexcpt.c
@@ -116,5 +116,6 @@ __feraiseexcept (int excepts)
   /* Success.  */
   return 0;
 }
-strong_alias (__feraiseexcept, feraiseexcept)
-libm_hidden_def (feraiseexcept)
+libm_hidden_def (__feraiseexcept)
+weak_alias (__feraiseexcept, feraiseexcept)
+libm_hidden_weak (feraiseexcept)