diff options
Diffstat (limited to 'cpukit/aclocal/check-newlib.m4')
| -rw-r--r-- | cpukit/aclocal/check-newlib.m4 | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/cpukit/aclocal/check-newlib.m4 b/cpukit/aclocal/check-newlib.m4 new file mode 100644 index 0000000000..bbf5f68dc2 --- /dev/null +++ b/cpukit/aclocal/check-newlib.m4 @@ -0,0 +1,30 @@ +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 RTEMS newlib], + rtems_cv_use_newlib, + [ +dnl some versions of newlib provide not_required_by_rtems + AC_LINK_IFELSE( + [AC_LANG_PROGRAM([[extern void not_required_by_rtems() ;]], + [[not_required_by_rtems()]])], + [rtems_cv_use_newlib="yes"],[]) + +dnl some versions of newlib provide rtems_provides_crt0() + AS_IF([test -z "$rtems_cv_use_newlib"], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM([[extern void rtems_provides_crt0() ;]], + [[rtems_provides_crt0()]])], + [rtems_cv_use_newlib="yes"],[rtems_cv_use_newlib="no"]) + ]) + ]) + RTEMS_USE_NEWLIB="$rtems_cv_use_newlib" + AC_SUBST(RTEMS_USE_NEWLIB) + + AS_IF([test x"${RTEMS_USE_NEWLIB}" = x"yes"], + [ AC_DEFINE_UNQUOTED(RTEMS_NEWLIB,1,[if using newlib])] + ) +]) |