Updated the sky130 README file to include the new --with-sky130-variants
configuration option.
diff --git a/sky130/README b/sky130/README
index 11fdea5..908864f 100644
--- a/sky130/README
+++ b/sky130/README
@@ -160,6 +160,13 @@
include version tracking of the Magic setup files
and the location of the technology LEF file.
+ --with-sky130-variants=all|A|B
+ When set to "all" (which is the default), both variants
+ sky130A and sky130B are generated and installed. If
+ only one PDK variant needs to be installed, then use
+ this option to restrict the installation to a single
+ PDK variant.
+
--with-sky130-link-targets=none|source
"none" copies files from the source directories to
the target. "source" makes symbolic links to the source
