use -m

Author: mattip

tools/build_steps_windows.sh

@@ -67,8 +67,8 @@ echo "using C compiler $(which $CC), --version:"
 $CC --version
 echo "using F compiler $(which $FC), --version:"
 $FC --version
-LLVM="$(cygpath -w $(which llvm-mt.exe))"
-echo "using MT compiler $(which llvm-mt.exe), converted to $LLVM"
+LLVM=$(cygpath -m $(which llvm-mt.exe))
+echo using MT compiler $(which llvm-mt.exe), converted to "$LLVM"
 
 # Set suffixed-ILP64 flags
 if [ "$if_bits" == "64" ]; then
@@ -107,7 +107,7 @@ cmake .. -G Ninja \
  -DCMAKE_Fortran_COMPILER=$FC \
  -DBUILD_SHARED_LIBS=ON \
  -DCMAKE_SYSTEM_PROCESSOR=$march \
- -DCMAKE_MT=$LLVM \
+ -DCMAKE_MT="$LLVM" \
  -DCMAKE_SYSTEM_NAME=Windows \
  -DSYMBOLPREFIX="scipy_" \
  -DLIBNAMEPREFIX="scipy_" \