From 828303791b5f4a50a52d4749be42caac9819bf2a Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Sun, 12 Feb 2017 11:11:00 +0100
Subject: Add "yosys -w" for suppressing warnings

---
 kernel/log.cc | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

(limited to 'kernel/log.cc')

diff --git a/kernel/log.cc b/kernel/log.cc
index 956d93fd1..c7240d540 100644
--- a/kernel/log.cc
+++ b/kernel/log.cc
@@ -41,7 +41,7 @@ YOSYS_NAMESPACE_BEGIN
 std::vector<FILE*> log_files;
 std::vector<std::ostream*> log_streams;
 std::map<std::string, std::set<std::string>> log_hdump;
-std::vector<std::regex> log_warn_regexes;
+std::vector<std::regex> log_warn_regexes, log_nowarn_regexes;
 bool log_hdump_all = false;
 FILE *log_errfile = NULL;
 SHA1 *log_hasher = NULL;
@@ -202,15 +202,28 @@ void logv_header(RTLIL::Design *design, const char *format, va_list ap)
 
 void logv_warning(const char *format, va_list ap)
 {
-	if (log_errfile != NULL && !log_quiet_warnings)
-		log_files.push_back(log_errfile);
+	std::string message = vstringf(format, ap);
+	bool suppressed = false;
 
-	log("Warning: ");
-	logv(format, ap);
-	log_flush();
+	for (auto &re : log_nowarn_regexes)
+		if (std::regex_search(message, re))
+			suppressed = true;
 
-	if (log_errfile != NULL && !log_quiet_warnings)
-		log_files.pop_back();
+	if (suppressed)
+	{
+		log("Suppressed warning: %s", message.c_str());
+	}
+	else
+	{
+		if (log_errfile != NULL && !log_quiet_warnings)
+			log_files.push_back(log_errfile);
+
+		log("Warning: %s", message.c_str());
+		log_flush();
+
+		if (log_errfile != NULL && !log_quiet_warnings)
+			log_files.pop_back();
+	}
 }
 
 void logv_error(const char *format, va_list ap)
-- 
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