diff --git a/uppsrc/Core/LocalProcess.cpp b/uppsrc/Core/LocalProcess.cpp
index 19de76d1b..e35867387 100644
--- a/uppsrc/Core/LocalProcess.cpp
+++ b/uppsrc/Core/LocalProcess.cpp
@@ -340,7 +340,7 @@ bool LocalProcess::DoStart(const char *command, const Vector<String> *arg, bool
 #endif//DO_LLOG
 
 	if(cd)
-		chdir(cd);
+		(void)chdir(cd);
 
 	LLOG("running execve, app = " << app << ", #args = " << args.GetCount());
 	if(envptr) {
diff --git a/uppsrc/ide/Install.cpp b/uppsrc/ide/Install.cpp
index 1f7288b27..4ffbc1f0a 100644
--- a/uppsrc/ide/Install.cpp
+++ b/uppsrc/ide/Install.cpp
@@ -38,7 +38,7 @@ const char *gcc_bm =
 R"(BUILDER = "GCC";
 COMPILER = "";
 COMMON_OPTIONS = "";
-COMMON_CPP_OPTIONS = "-std=c++14 -Wall -Wno-parentheses";
+COMMON_CPP_OPTIONS = "-std=c++14 -Wall -Wno-parentheses -Wno-maybe-uninitialized -Wno-strict-overflow";
 COMMON_C_OPTIONS = "";
 COMMON_LINK = "";
 COMMON_FLAGS = "";
diff --git a/uppsrc/ide/LayDes/layfile.cpp b/uppsrc/ide/LayDes/layfile.cpp
index ec9fce814..3c8ebeb0b 100644
--- a/uppsrc/ide/LayDes/layfile.cpp
+++ b/uppsrc/ide/LayDes/layfile.cpp
@@ -9,7 +9,7 @@ ArrayMap<String, LayDesEditPos>& LayFileDataVar()
 void SerializeLayEditPos(Stream& s)
 {
 	ArrayMap<String, LayDesEditPos>& filedata = LayFileDataVar();
-	int dummy;
+	int dummy = 0;
 	if(s.IsStoring()) {
 		for(int i = 0; i < filedata.GetCount(); i++) {
 			String fn = filedata.GetKey(i);
diff --git a/uppsrc/ide/OutputMode.cpp b/uppsrc/ide/OutputMode.cpp
index f7117b407..8f96dd40f 100644
--- a/uppsrc/ide/OutputMode.cpp
+++ b/uppsrc/ide/OutputMode.cpp
@@ -12,7 +12,7 @@ void TargetMode::Serialize(Stream& s)
 	s / ver;
 	s % target_override % target;
 	if(ver < 3) {
-		int dummy;
+		int dummy = 0;
 		s % dummy;
 	}
 	if(ver < 1) {
@@ -23,7 +23,7 @@ void TargetMode::Serialize(Stream& s)
 		s % version;
 	s % def % package;
 	if(ver == 2) {
-		int dummy;
+		int dummy = 0;
 		s % dummy;
 	}
 	if(ver >= 3)