buildroot

Add a check for FE_DIVBYZERO

​

Some architectures (namely Microblaze) do have fenv.h and

feenableexcept, but they don't have the FE_DIVBYZERO definition. This

patch adds a configure check for FE_DIVBYZERO, and only uses it if

it's available.

​

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

​

Index: b/configure.ac

===================================================================

--- a/configure.ac

+++ b/configure.ac

@@ -838,6 +838,11 @@

    AC_DEFINE(HAVE_FEENABLEEXCEPT, 1, [Whether we have feenableexcept()])

 fi

+AC_CHECK_DECL([FE_DIVBYZERO], [], [], [[#include <fenv.h>]])

+if test x$ac_cv_have_decl_FE_DIVBYZERO = xyes; then

+   AC_DEFINE(HAVE_FEDIVBYZERO, 1, [Whether we have FE_DIVBYZERO])

+fi

+

 AC_CHECK_FUNC(gettimeofday, have_gettimeofday=yes, have_gettimeofday=no)

 AC_CHECK_HEADER(sys/time.h, have_sys_time_h=yes, have_sys_time_h=no)

 if test x$have_gettimeofday = xyes && test x$have_sys_time_h = xyes; then

Index: b/test/utils.c

===================================================================

--- a/test/utils.c

+++ b/test/utils.c

@@ -776,9 +776,11 @@

 {

 #ifdef HAVE_FENV_H

 #ifdef HAVE_FEENABLEEXCEPT

+#ifdef HAVE_FE_DIVBYZERO

     feenableexcept (FE_DIVBYZERO);

 #endif

 #endif

+#endif

 }

 void *