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-rw-r--r--macros/check-newlib.m436
1 files changed, 36 insertions, 0 deletions
diff --git a/macros/check-newlib.m4 b/macros/check-newlib.m4
new file mode 100644
index 0000000000..1984001dc8
--- /dev/null
+++ b/macros/check-newlib.m4
@@ -0,0 +1,36 @@
+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=$CC
+
+dnl some versions of newlib provide not_required_by_rtems
+ AC_TRY_LINK(
+ [extern void not_required_by_rtems() ;],
+ [not_required_by_rtems()],
+ rtems_cv_use_newlib="yes")
+
+dnl some versions of newlib provide rtems_provides_crt0()
+ if test -z "$rtems_cv_use_newlib"; then
+ AC_TRY_LINK(
+ [extern void rtems_provides_crt0() ;],
+ [rtems_provides_crt0()],
+ 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)
+
+if test x"${RTEMS_USE_NEWLIB}" = x"yes";
+then
+ AC_DEFINE_UNQUOTED(RTEMS_NEWLIB,1,[if using newlib])
+ AC_DEFINE_UNQUOTED(MALLOC_PROVIDED,1,[if malloc is provided])
+fi
+])
+