Intel LLVM is to use conda's gcc toolchain, sysroot and target libraries (#1306)

Author: antonwolfy

conda-recipe/build.sh

@@ -29,6 +29,11 @@ fi
 export CFLAGS="-Wl,-rpath,\$ORIGIN/../dpctl,-rpath,\$ORIGIN $CFLAGS"
 export LDFLAGS="-Wl,-rpath,\$ORIGIN/../dpctl,-rpath,\$ORIGIN $LDFLAGS"
 
+# Intel LLVM must cooperate with compiler and sysroot from conda
+echo "--gcc-toolchain=${BUILD_PREFIX} --sysroot=${BUILD_PREFIX}/${HOST}/sysroot -target ${HOST}" > icpx_for_conda.cfg
+export ICPXCFG="$(pwd)/icpx_for_conda.cfg"
+export ICXCFG="$(pwd)/icpx_for_conda.cfg"
+
 $PYTHON setup.py build_clib
 $PYTHON setup.py build_ext install