Add -Wno-format-security to build flags

plugins/Makefile

@@ -1085,6 +1085,9 @@ endif
 # Rack code is not tested for this flag, unset it
 BUILD_CXX_FLAGS += -U_GLIBCXX_ASSERTIONS -Wp,-U_GLIBCXX_ASSERTIONS
 
+# Ignore bad behaviour from Rack API
+BUILD_CXX_FLAGS += -Wno-format-security
+
 ifeq ($(WASM),true)
 BUILD_CXX_FLAGS += -fexceptions
 endif

src/Makefile

@@ -120,6 +120,9 @@ BUILD_CXX_FLAGS += -DnsvgParseFromFile=nsvgParseFromFileCardinal
 # Rack code is not tested for this flag, unset it
 BUILD_CXX_FLAGS += -U_GLIBCXX_ASSERTIONS -Wp,-U_GLIBCXX_ASSERTIONS
 
+# Ignore bad behaviour from Rack API
+BUILD_CXX_FLAGS += -Wno-format-security
+
 # --------------------------------------------------------------
 # Rack files to build
 

src/Makefile.cardinal.mk

@@ -250,6 +250,9 @@ endif
 # Rack code is not tested for this flag, unset it
 BUILD_CXX_FLAGS += -U_GLIBCXX_ASSERTIONS -Wp,-U_GLIBCXX_ASSERTIONS
 
+# Ignore bad behaviour from Rack API
+BUILD_CXX_FLAGS += -Wno-format-security
+
 # --------------------------------------------------------------
 # FIXME lots of warnings from VCV side