1 files changed, 19 insertions, 0 deletions
diff --git a/common/nextpnr.cc b/common/nextpnr.cc
index 1156490c..c16a601c 100644
--- a/common/nextpnr.cc
+++ b/common/nextpnr.cc
@@ -23,6 +23,25 @@
 #include "log.h"
 #include "util.h"
 
+#if defined(__wasm)
+extern "C" {
+    // FIXME: WASI does not currently support exceptions.
+    void* __cxa_allocate_exception(size_t thrown_size) throw() {
+        return malloc(thrown_size);
+    }
+    bool __cxa_uncaught_exception() throw();
+    void __cxa_throw(void* thrown_exception, struct std::type_info * tinfo, void (*dest)(void*)) {
+        std::terminate();
+    }
+}
+
+namespace boost {
+    void throw_exception( std::exception const & e ) {
+        NEXTPNR_NAMESPACE::log_error("boost::exception(): %s\n", e.what());
+    }
+}
+#endif
+
 NEXTPNR_NAMESPACE_BEGIN
 
 assertion_failure::assertion_failure(std::string msg, std::string expr_str, std::string filename, int line)