2 files changed, 7 insertions, 0 deletions
diff --git a/common/log.cc b/common/log.cc
index cbd3c171..2868e03f 100644
--- a/common/log.cc
+++ b/common/log.cc
@@ -33,6 +33,7 @@ NEXTPNR_NAMESPACE_BEGIN
 std::vector<FILE *> log_files;
 std::vector<std::ostream *> log_streams;
 FILE *log_errfile = NULL;
+log_write_type log_write_function = nullptr;
 
 bool log_error_stderr = false;
 bool log_cmd_error_throw = false;
@@ -99,6 +100,8 @@ void logv(const char *format, va_list ap)
 
     for (auto f : log_streams)
         *f << str;
+    if (log_write_function)
+        log_write_function(str);
 }
 
 void logv_info(const char *format, va_list ap)
diff --git a/common/log.h b/common/log.h
index 8afa94d4..597b5fac 100644
--- a/common/log.h
+++ b/common/log.h
@@ -20,6 +20,7 @@
 #ifndef LOG_H
 #define LOG_H
 
+#include <functional>
 #include <ostream>
 #include <set>
 #include <stdarg.h>
@@ -36,6 +37,8 @@
 
 NEXTPNR_NAMESPACE_BEGIN
 
+typedef std::function<void(std::string)> log_write_type;
+
 struct log_cmd_error_exception
 {
 };
@@ -43,6 +46,7 @@ struct log_cmd_error_exception
 extern std::vector<FILE *> log_files;
 extern std::vector<std::ostream *> log_streams;
 extern FILE *log_errfile;
+extern log_write_type log_write_function;
 
 extern bool log_quiet_warnings;
 extern int log_verbose_level;