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libgcc: check for fenv.h in dfp configure check 

uClibc can be built without fenv support, extend the configure check for
decimal floating point to probe the existance of fenv.h, too.

libgcc/ChangeLog:

2013-03-24  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>

	* configure.ac (libgcc_cv_dfp): Extend check to probe fenv.h
	availability.
	* configure: Regenerate

From-SVN: r204562
This commit is contained in:
Bernhard Reutner-Fischer 2013-11-08 11:18:27 +01:00
parent 2cf19e2664
commit ac088ba1f0
3 changed files with 27 additions and 1 deletions
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6
libgcc/ChangeLog
View File

@ -1,3 +1,9 @@
2013-11-08 Bernhard Reutner-Fischer <aldot@gcc.gnu.org>
* configure.ac (libgcc_cv_dfp): Extend check to probe fenv.h
availability.
* configure: Regenerate
2013-11-07 Uros Bizjak <ubizjak@gmail.com>
* config/i386/sfp-exceptions.c (__sfp_handle_exceptions): Handle

13
libgcc/configure vendored
View File

@ -4066,7 +4066,20 @@ if test "${libgcc_cv_dfp+set}" = set; then :
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <fenv.h>
int
main ()
{
_Decimal32 x;
int fe_except =
FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT;
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
libgcc_cv_dfp=yes

9
libgcc/configure.ac
View File

@ -182,7 +182,14 @@ AC_SUBST(long_double_type_size)
# Check for decimal float support.
AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
[AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <fenv.h>
]], [[
_Decimal32 x;
int fe_except =
FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT;
]])],
[libgcc_cv_dfp=yes],
[libgcc_cv_dfp=no])])
decimal_float=$libgcc_cv_dfp
AC_SUBST(decimal_float)