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Diffstat (limited to '')
| -rw-r--r-- | aclocal/check-newlib.m4 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/aclocal/check-newlib.m4 b/aclocal/check-newlib.m4 new file mode 100644 index 0000000000..f417c65726 --- /dev/null +++ b/aclocal/check-newlib.m4 @@ -0,0 +1,31 @@ +dnl $Id$ + +AC_DEFUN(RTEMS_CHECK_NEWLIB, +[dnl +AC_REQUIRE([RTEMS_PROG_CC_FOR_TARGET])dnl +AC_REQUIRE([RTEMS_CANONICALIZE_TOOLS])dnl +AC_CACHE_CHECK([for newlib], + rtems_cv_use_newlib, + [ + rtems_save_CC=$CC + CC=$CC_FOR_TARGET + +dnl some versions of newlib provide not_required_by_rtems + AC_TRY_LINK( + [extern int not_required_by_rtems() ;], + [not_required_by_rtems()], + rtems_cv_use_newlib="yes") + +dnl older versions of newlib provided rtems_provides_crt0 + if test -z "$rtems_cv_use_newlib"; then + AC_TRY_LINK( + [extern int rtems_provides_crt0 ;], + [rtems_provides_crt0 = 0], + rtems_cv_use_newlib="yes", + rtems_cv_use_newlib="no") + fi + CC=$rtems_save_CC]) +RTEMS_USE_NEWLIB="$rtems_cv_use_newlib" +AC_SUBST(RTEMS_USE_NEWLIB) +]) + |