Explain why these items are silenced ("tag - you're it!")

Author: jepler

src/Makefile

@@ -249,6 +249,12 @@ CFLAGS := $(INCLUDE) $(OPT) $(DEBUG) $(EXTRA_DEBUG) -DULAPI -std=gnu99 -fgnu89-i
 CXXFLAGS := $(INCLUDE) $(EXTRA_DEBUG) -DULAPI $(DEBUG) $(OPT) -Woverloaded-virtual $(CXXFLAGS) $(CPPFLAGS)
 CXXFLAGS += $(call cxx-option, -Wno-psabi)
 CXXFLAGS += $(call cxx-option, -std=gnu++11, -std=gnu++0x)
+# In Debian 11, any inclusion of <boost/python.hpp> leads to several
+# diagnostics from included headers about deprecated features. LinuxCNC does
+# not directly use these deprecated features, but it does use boost::python.
+# Silence the warnings just when they occur in files using boost/python.hpp by
+# adding SILENCE_BOOST_INTERNAL_DIAGNOSTICS_FLAGS to the object's EXTRAFLAGS
+SILENCE_BOOST_INTERNAL_DIAGNOSTICS_FLAGS = -DBOOST_ALLOW_DEPRECATED_HEADERS=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS=1
 
 CFLAGS   += $(TOOL_NML_FLAG)
 CXXFLAGS += $(TOOL_NML_FLAG)

src/emc/kinematics/Submakefile

@@ -7,7 +7,7 @@ USERSRCS += $(GENSERKINSSRCS)
 
 DELTAMODULESRCS := emc/kinematics/lineardeltakins.cc
 PYSRCS += $(DELTAMODULESRCS)
-$(call TOOBJS, $(DELTAMODULESRCS)): EXTRAFLAGS += -DBOOST_ALLOW_DEPRECATED_HEADERS=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS=1
+$(call TOOBJS, $(DELTAMODULESRCS)): EXTRAFLAGS += $(SILENCE_BOOST_INTERNAL_DIAGNOSTICS_FLAGS)
 
 DELTAMODULE := ../lib/python/lineardeltakins.so
 $(DELTAMODULE): $(call TOOBJS, $(DELTAMODULESRCS))
@@ -27,7 +27,7 @@ TARGETS += ../bin/genserkins
 
 RDELTAMODULESRCS := emc/kinematics/rotarydeltakins.cc
 PYSRCS += $(RDELTAMODULESRCS)
-$(call TOOBJS, $(RDELTAMODULESRCS)): EXTRAFLAGS += -DBOOST_ALLOW_DEPRECATED_HEADERS=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS=1
+$(call TOOBJS, $(RDELTAMODULESRCS)): EXTRAFLAGS += $(SILENCE_BOOST_INTERNAL_DIAGNOSTICS_FLAGS)
 
 RDELTAMODULE := ../lib/python/rotarydeltakins.so
 $(RDELTAMODULE): $(call TOOBJS, $(RDELTAMODULESRCS))

src/emc/rs274ngc/Submakefile

@@ -37,7 +37,7 @@ LIBRS274SRCS := $(addprefix emc/rs274ngc/, \
 USERSRCS += $(LIBRS274SRCS)
 
 $(call TOOBJSDEPS, $(LIBRS274SRCS)) : EXTRAFLAGS+=-fPIC $(BOOST_DEBUG_FLAGS)
-$(call TOOBJSDEPS, emc/rs274ngc/pyinterp1.cc emc/rs274ngc/pyparamclass.cc emc/rs274ngc/pyinterp1.cc emc/rs274ngc/pyblock.cc emc/rs274ngc/pyarrays.cc emc/rs274ngc/interpmodule.cc): EXTRAFLAGS += -DBOOST_ALLOW_DEPRECATED_HEADERS=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS=1
+$(call TOOBJSDEPS, emc/rs274ngc/pyinterp1.cc emc/rs274ngc/pyparamclass.cc emc/rs274ngc/pyinterp1.cc emc/rs274ngc/pyblock.cc emc/rs274ngc/pyarrays.cc emc/rs274ngc/interpmodule.cc): EXTRAFLAGS += $(SILENCE_BOOST_INTERNAL_DIAGNOSTICS_FLAGS)
 
 TARGETS += ../lib/librs274.so ../lib/librs274.so.0
 

src/emc/task/Submakefile

@@ -23,7 +23,7 @@ MILLTASKSRCS := \
 	emc/task/taskclass.cc \
 	emc/task/backtrace.cc \
 
-$(call TOOBJSDEPS, emc/task/taskmodule.cc): EXTRAFLAGS += -DBOOST_ALLOW_DEPRECATED_HEADERS=1
+$(call TOOBJSDEPS, emc/task/taskmodule.cc): EXTRAFLAGS += $(SILENCE_BOOST_INTERNAL_DIAGNOSTICS_FLAGS)
 
 USERSRCS += $(MILLTASKSRCS)