documentation improvements

diff --git a/passes/cmds/show.cc b/passes/cmds/show.cc
index 7cda4400c1ee7036fe15daae93e4e416307b5772..81321665c3727f206b54ea2aec81f527805eb46c 100644 (file)
--- a/passes/cmds/show.cc
+++ b/passes/cmds/show.cc
@@ -590,6 +590,10 @@ struct ShowPass : public Pass {
                log("        inputs or outputs. This option can be used multiple times to specify\n");
                log("        more than one library.\n");
                log("\n");
+               log("        note: in most cases it is better to load the library before calling\n");
+               log("        show with 'read_verilog -lib <filename>'. it is also possible to\n");
+               log("        load liberty files with 'read_liberty -lib <filename>'.\n");
+               log("\n");
                log("    -prefix <prefix>\n");
                log("        generate <prefix>.* instead of ~/.yosys_show.*\n");
                log("\n");

diff --git a/passes/hierarchy/hierarchy.cc b/passes/hierarchy/hierarchy.cc
index 155d4e4637bd11a3fa334ed17e38b41c1adacc60..a393343d1e3fc44f5af1b76a673c053c9e02bd53 100644 (file)
--- a/passes/hierarchy/hierarchy.cc
+++ b/passes/hierarchy/hierarchy.cc
@@ -352,7 +352,7 @@ struct HierarchyPass : public Pass {
                log("\n");
                log("    -purge_lib\n");
                log("        by default the hierarchy command will not remove library (blackbox)\n");
-               log("        module. use this options to also remove unused blackbox modules.\n");
+               log("        modules. use this option to also remove unused blackbox modules.\n");
                log("\n");
                log("    -libdir <directory>\n");
                log("        search for files named <module_name>.v in the specified directory\n");