PR bootstrap/26055
	Revert
	* configure.ac: Disable libgcc-math if we cannot mix
	declaration of __isinf and math.h inclusion.
	* configure: Re-generate.

	* i386/Makefile.am: Use -std=c99, do not use -ffinite-math-only,
	do not define __NO_MATH_INLINES.
	* i386/Makefile.in: Re-generate.
	* include/math_private.h (__atanf): Declare.
	(__scalbnf): Likewise.
	(__floorf): Likewise.
	(__isinff): Likewise.
	(__scalbn): Likewise.
	(__floor): Likewise.
	(fabs): Likewise.
	(fabsf): Likewise.
	* flt-32/e_acosf.c: Do not include math.h
	* flt-32/s_isinff.c: Likewise.
	* flt-32/k_tanf.c: Likewise.
	* flt-32/e_sqrtf.c: Likewise.
	* flt-32/e_asinf.c: Likewise.
	* flt-32/k_cosf.c: Likewise.
	* flt-32/k_sinf.c: Likewise.
	* flt-32/s_floorf.c: Likewise.
	* flt-32/s_tanf.c: Likewise.
	* flt-32/s_atanf.c: Likewise.
	* flt-32/s_cosf.c: Likewise.
	* flt-32/e_atan2f.c: Likewise.
	* flt-32/e_powf.c: Likewise.
	* flt-32/s_sinf.c: Likewise.
	* flt-32/e_rem_pio2f.c: Likewise.
	* flt-32/s_scalbnf.c: Likewise.
	* flt-32/e_logf.c: Likewise.
	* flt-32/e_log10f.c: Likewise.
	* flt-32/k_rem_pio2f.c: Likewise.
	* flt-32/e_expf.c: Likewise.  Use __builtin_isless and
	__builtin_isgreater.
	* dbl-64/s_floor.c: Do not include math.h.
	* dbl-64/e_log10.c: Likewise.
	* dbl-64/k_rem_pio2.c: Likewise.
	* dbl-64/s_atan.c: Likewise.
	* dbl-64/s_scalbn.c: Likewise.
	* dbl-64/s_isinf.c: Likewise.
	* dbl-64/s_tan.c: Likewise.
	* dbl-64/e_rem_pio2.c: Likewise.  Avoid uninitialized variable
	warning.
	* dbl-64/mpa.c: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111563 138bc75d-0d04-0410-961f-82ee72b054a4