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| author | aldot <aldot@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-08 10:18:27 +0000 |
|---|---|---|
| committer | aldot <aldot@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-08 10:18:27 +0000 |
| commit | 96ddb2846164043127f342b15f1c2b12b1581b67 (patch) | |
| tree | 7c9baba80079caf37b75ebbeacccd1a68a597dcb | |
| parent | ac35b3c92b704b19e8e5db7bade01384d780e992 (diff) | |
| download | gcc-96ddb2846164043127f342b15f1c2b12b1581b67.tar.gz | |
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
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204562 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | libgcc/ChangeLog | 6 | ||||
| -rw-r--r-- | libgcc/configure | 13 | ||||
| -rw-r--r-- | libgcc/configure.ac | 9 |
3 files changed, 27 insertions, 1 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 1b2a20b75bf..0bfba640e21 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -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 diff --git a/libgcc/configure b/libgcc/configure index 29fa46f597a..2bb1fb2d94f 100644 --- a/libgcc/configure +++ b/libgcc/configure @@ -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 "$LINENO"; then : libgcc_cv_dfp=yes diff --git a/libgcc/configure.ac b/libgcc/configure.ac index 186cd6e9cd7..560e988e048 100644 --- a/libgcc/configure.ac +++ b/libgcc/configure.ac @@ -182,7 +182,14 @@ AC_SUBST(long_double_type_size) # Check for decimal float support. AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp], - [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes], + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#include <fenv.h> +]], [[ +_Decimal32 x; +int fe_except = + FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT; +]])], + [libgcc_cv_dfp=yes], [libgcc_cv_dfp=no])]) decimal_float=$libgcc_cv_dfp AC_SUBST(decimal_float) |