build-llvm: Add --with-python flag

build-llvm.sh

@@ -54,6 +54,9 @@ while [ $# -gt 0 ]; do
     --host=*)
         HOST="${1#*=}"
         ;;
+    --with-python)
+        WITH_PYTHON=1
+        ;;
     *)
         PREFIX="$1"
         ;;
@@ -63,7 +66,7 @@ done
 BUILDDIR="$BUILDDIR$ASSERTSSUFFIX"
 if [ -z "$CHECKOUT_ONLY" ]; then
     if [ -z "$PREFIX" ]; then
-        echo $0 [--enable-asserts] [--stage2] [--thinlto] [--lto] [--disable-dylib] [--full-llvm] [--host=triple] dest
+        echo $0 [--enable-asserts] [--stage2] [--thinlto] [--lto] [--disable-dylib] [--full-llvm] [--with-python] [--host=triple] dest
         exit 1
     fi
 
@@ -157,6 +160,21 @@ if [ -n "$HOST" ]; then
     CMAKEFLAGS="$CMAKEFLAGS -DCLANG_DEFAULT_CXX_STDLIB=libc++"
     CMAKEFLAGS="$CMAKEFLAGS -DCLANG_DEFAULT_LINKER=lld"
     BUILDDIR=$BUILDDIR-$HOST
+
+    if [ -n "$WITH_PYTHON" ]; then
+        PYTHON_VER="3.9"
+        CMAKEFLAGS="$CMAKEFLAGS -DLLDB_ENABLE_PYTHON=ON"
+        [ -z "$PYTHON_EXEC" ] && command -v python$PYTHON_VER && PYTHON_EXEC=python$PYTHON_VER
+        [ -z "$PYTHON_EXEC" ] && command -v python3           && PYTHON_EXEC=python3
+        [ -z "$PYTHON_EXEC" ] && command -v python            && PYTHON_EXEC=python
+        CMAKEFLAGS="$CMAKEFLAGS -DPYTHON_HOME=$PREFIX/python"
+        CMAKEFLAGS="$CMAKEFLAGS -DLLDB_PYTHON_HOME=../python"
+        CMAKEFLAGS="$CMAKEFLAGS -DLLDB_PYTHON_RELATIVE_PATH=python/lib/python$PYTHON_VER/site-packages"
+
+        CMAKEFLAGS="$CMAKEFLAGS -DPython3_EXECUTABLE=$PYTHON_EXEC"
+        CMAKEFLAGS="$CMAKEFLAGS -DPython3_INCLUDE_DIRS=$PREFIX/python/include/python$PYTHON_VER"
+        CMAKEFLAGS="$CMAKEFLAGS -DPython3_LIBRARIES=$PREFIX/python/lib/libpython$PYTHON_VER.dll.a"
+    fi
 elif [ -n "$STAGE2" ]; then
     # Build using an earlier built and installed clang in the target directory
     export PATH="$PREFIX/bin:$PATH"