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-rw-r--r--bootloaders/optiboot/Makefile4
1 files changed, 3 insertions, 1 deletions
diff --git a/bootloaders/optiboot/Makefile b/bootloaders/optiboot/Makefile
index c2e03e3..b9f3ed5 100644
--- a/bootloaders/optiboot/Makefile
+++ b/bootloaders/optiboot/Makefile
@@ -57,8 +57,10 @@ AVRDUDE_CONF = -C$(TOOLROOT)/avr/etc/avrdude.conf
ifeq ($(OS), windows)
# On windows, SOME of the tool paths will need to have backslashes instead
# of forward slashes (because they use windows cmd.exe for execution instead
-# of a unix/mingw shell?)
+# of a unix/mingw shell?) We also have to ensure that a consistent shell
+# is used even if a unix shell is installed (ie as part of WINAVR)
fixpath = $(subst /,\,$1)
+SHELL = cmd.exe
endif
else ifeq ($(ENV), arduinodev)