1diff --git a/Makefile.in b/Makefile.in
2index d24c1af..b86e522 100644
3--- a/Makefile.in
4+++ b/Makefile.in
5@@ -230,6 +229,7 @@ RAW_CXX_TARGET_EXPORTS = \
6
7 NORMAL_TARGET_EXPORTS = \
8 $(BASE_TARGET_EXPORTS) \
9+ CPP="$(CC_FOR_TARGET) -E"; export CPP; \
10 CXX="$(CXX_FOR_TARGET)"; export CXX;
11
12 # Where to find GMP