Add --build-circt flag to build-setup

scripts/build-setup.sh

@@ -39,6 +39,7 @@ usage() {
     echo "  --verbose -v            : Verbose printout"
     echo "  --use-unpinned-deps -ud : Use unpinned conda environment"
     echo "  --use-lean-conda        : Install a leaner version of the repository (Smaller conda env, no FireSim, no FireMarshal)"
+    echo "  --build-circt           : Builds CIRCT from source, instead of downloading the precompiled binary"
 
     echo "  --skip -s N             : Skip step N in the list above. Use multiple times to skip multiple steps ('-s N -s M ...')."
     echo "  --skip-conda            : Skip Conda initialization (step 1)"
@@ -60,6 +61,7 @@ VERBOSE_FLAG=""
 USE_UNPINNED_DEPS=false
 USE_LEAN_CONDA=false
 SKIP_LIST=()
+BUILD_CIRCT=false
 
 # getopts does not support long options, and is inflexible
 while [ "$1" != "" ];
@@ -75,6 +77,8 @@ do
         --use-lean-conda)
             USE_LEAN_CONDA=true
             SKIP_LIST+=(4 6 7 8 9) ;;
+        --build-circt)
+            BUILD_CIRCT=true ;;
         -ud | --use-unpinned-deps )
             USE_UNPINNED_DEPS=true ;;
         --skip | -s)
@@ -306,6 +310,12 @@ if run_step "10"; then
         PREFIX=$RISCV
     fi
 
+    if [ "$BUILD_CIRCT" = true ] ; then
+	echo "Building CIRCT from source, and installing to $PREFIX"
+	$CYDIR/scripts/build-circt-from-source --prefix $PREFIX
+    else
+	echo "Downloading CIRCT from nightly build"
+
 	git submodule update --init $CYDIR/tools/install-circt &&
 	    $CYDIR/tools/install-circt/bin/download-release-or-nightly-circt.sh \
 		-f circt-full-static-linux-x64.tar.gz \
@@ -313,6 +323,7 @@ if run_step "10"; then
 		-v version-file \
 		-x $CYDIR/conda-reqs/circt.json \
 		-g null
+    fi
     exit_if_last_command_failed
 fi