Add Python_ROOT_DIR as argument

cmake can have issues finding
the python distro>
add Python_ROOT_DIR parameter

conda-recipe/bld.bat

@@ -24,6 +24,7 @@ cmake .. -G "NMake Makefiles" ^
  -DCMAKE_BUILD_TYPE=Release ^
  -DCMAKE_LIBRARY_OUTPUT_DIRECTORY="%SP_DIR%" ^
  -DCMAKE_SWIG_OUTDIR="%SP_DIR%" ^
+ -DPython_ROOT_DIR="%PREFIX%\bin" ^
  -DPYTHON_VERSION="%PYTHON_VERSION_NUMERIC%" ^
  -DBUILD_LIBRARY=OFF ^
  -DWITH_AVX=OFF ^

conda-recipe/build.sh

@@ -3,8 +3,6 @@ mkdir b2 && cd b2
 if [[ "${target_platform}" == osx-* ]]; then
   # See https://conda-forge.org/docs/maintainer/knowledge_base.html#newer-c-features-with-old-sdk
   CXXFLAGS="${CXXFLAGS} -D_LIBCPP_DISABLE_AVAILABILITY"
-else
-  export CONFIG_ARGS=""
 fi
 
 cmake -S .. -B . \
@@ -15,9 +13,10 @@ cmake -S .. -B . \
   -DBUILD_LIBRARY=OFF \
   -DWITH_AVX=OFF \
   -DBoost_USE_STATIC_LIBS=OFF \
+  -DPython_ROOT_DIR="${PREFIX}/bin" \
   -DPYTHON_VERSION=$(python -c 'import platform; print(platform.python_version())')\
   -G Ninja \
-  "${CONFIG_ARGS}"
+  ${CONFIG_ARGS}
 
 ninja install -j ${CPU_COUNT}