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-rw-r--r--common/command.cc2
-rw-r--r--common/nextpnr.h5
-rw-r--r--frontend/frontend_base.h2
3 files changed, 8 insertions, 1 deletions
diff --git a/common/command.cc b/common/command.cc
index 23572e02..d3e8af8d 100644
--- a/common/command.cc
+++ b/common/command.cc
@@ -331,7 +331,7 @@ int CommandHandler::executeMain(std::unique_ptr<Context> ctx)
execute_python_file(filename.c_str());
} else
#endif
- if (vm.count("json")) {
+ if (ctx->design_loaded) {
bool do_pack = vm.count("pack-only") != 0 || vm.count("no-pack") == 0;
bool do_place = vm.count("pack-only") == 0 && vm.count("no-place") == 0;
bool do_route = vm.count("pack-only") == 0 && vm.count("no-route") == 0;
diff --git a/common/nextpnr.h b/common/nextpnr.h
index ddfcc794..26dcaac4 100644
--- a/common/nextpnr.h
+++ b/common/nextpnr.h
@@ -842,6 +842,9 @@ struct BaseCtx
Context *as_ctx = nullptr;
+ // Has the frontend loaded a design?
+ bool design_loaded;
+
BaseCtx()
{
idstring_str_to_idx = new std::unordered_map<std::string, int>;
@@ -853,6 +856,8 @@ struct BaseCtx
wildcard.id.index = 0;
wildcard.type = TimingConstraintObject::ANYTHING;
constraintObjects.push_back(wildcard);
+
+ design_loaded = false;
}
virtual ~BaseCtx()
diff --git a/frontend/frontend_base.h b/frontend/frontend_base.h
index e262c943..4f7d22ec 100644
--- a/frontend/frontend_base.h
+++ b/frontend/frontend_base.h
@@ -135,6 +135,8 @@ template <typename FrontendType> struct GenericFrontend
ctx->top_module = top;
// Do the actual import, starting from the top level module
import_module(m, top.str(ctx), top.str(ctx), mod_refs.at(top));
+
+ ctx->design_loaded = true;
}
Context *ctx;