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-rw-r--r--buildlib/tools.m420
1 files changed, 20 insertions, 0 deletions
diff --git a/buildlib/tools.m4 b/buildlib/tools.m4
index cb57bb34f..9ad0bd05a 100644
--- a/buildlib/tools.m4
+++ b/buildlib/tools.m4
@@ -135,3 +135,23 @@ _LIBSTDCPP_
fi
AC_SUBST(LIBSTDCPP_VER)
])
+
+AC_DEFUN(ah_GCC3DEP,[
+ AC_MSG_CHECKING(if $CXX -MD works)
+ touch gcc3dep.cc
+ ${CXX-c++} -MD -o gcc3dep_test.o -c gcc3dep.cc
+ rm -f gcc3dep.cc gcc3dep_test.o
+ if test -e gcc3dep.d; then
+ rm -f gcc3dep.d
+ GCC_MD=input
+ GCC3DEP=no
+ elif test -e gcc3dep_test.d; then
+ rm -f gcc3dep_test.d
+ GCC_MD=output
+ GCC3DEP=yes
+ else
+ AC_MSG_ERROR(no)
+ fi
+ AC_MSG_RESULT([yes, for $GCC_MD])
+ AC_SUBST(GCC3DEP)
+])