Rebuild when c(xx) flags change

makefile.basic

@@ -35,6 +35,7 @@ POST_TARGETS::=
 CLEAN_TARGETS::=
 RELEASE?=0
 MEMCHK?=0
+SAVECFLAGS?=1
 
 ifneq ($(WINDOWS),1)
 	#*nix settings
@@ -114,12 +115,19 @@ else
 	COMPILER_FLAGS+=-O0 -g3 -ggdb
 endif
 
+ifeq ($(SAVECFLAGS),1)
+	CFLAGS_TMPFILE::=.cflags.tmp
+	OLD_COMPILEFLAGS::=$(file <$(CFLAGS_TMPFILE))
+endif
+
 #add dependency tracking and include directories
 INTERNAL_COMPILERFLAGS=-c $(foreach dir,$(INCLUDE_DIRS),-I"$(dir)") -MMD -MP -MF"$(DEPDIR)/$(notdir $(patsubst %.o,%.d,$@))"
 INTERNAL_LINKFLAGS=$(foreach dir,$(LIBDIRS),-L"$(dir)")
 THIS_MAKEFILE_NAME::=$(lastword $(MAKEFILE_LIST))
 INTERNAL_SOURCES::=$(SOURCES) $(foreach source,$(SOURCE_DIRS),$(foreach ext,$(EXT),$(wildcard $(source)/*.$(ext))))
 OBJECTS::=$(addprefix $(OBJDIR)/,$(subst \,.,$(subst /,.,$(addsuffix .o,$(INTERNAL_SOURCES)))))
+ALL_COMPILEFLAGS=$(COMPILER_FLAGS) $(INTERNAL_COMPILERFLAGS)
+ALL_LINKFLAGS=$(INTERNAL_LINKFLAGS) $(LDFLAGS)
 
 #Arguments to make submake use this makefile without "Entering directory" stuff
 SUBMAKE_ARGUMENTS::=--no-print-directory -f "$(THIS_MAKEFILE_NAME)"
@@ -129,9 +137,16 @@ define \n
 
 endef
 
+.PHONY: cflags-update
+cflags-update:
+ifeq ($(SAVECFLAGS),1)
+ifneq ($(subst $(DEPDIR)/,$(DEPDIR)/cflags-update,$(ALL_COMPILEFLAGS)),$(OLD_COMPILEFLAGS))
+	$(file >$(CFLAGS_TMPFILE),$(ALL_COMPILEFLAGS))
+endif
+endif
 #default target: run targets in PRE_TARGETS, then the main executable, then POST_TARGETS
 .PHONY: all
-all:
+all: cflags-update
 	$(foreach target,$(PRE_TARGETS),@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(target)"$(\n))
 	@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(MAIN_EXECUTABLE)"
 	$(foreach target,$(POST_TARGETS),@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(target)"$(\n))
@@ -143,16 +158,16 @@ do_strip:
 
 #Link executable
 $(MAIN_EXECUTABLE): $(OBJECTS)
-	$(COMPILER) $^ -o "$(basename $@)" $(INTERNAL_LINKFLAGS) $(LDFLAGS) $(LDLIBS)
+	$(COMPILER) $^ -o "$(basename $@)" $(ALL_LINKFLAGS) $(LDLIBS)
 
 #Object target recipe
 define GENERATE_OBJECTS
-$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).%.o: $(1)/%
+$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).%.o: $(1)/% $(CFLAGS_TMPFILE)
-	$$(COMPILER) $$(COMPILER_FLAGS) $$(INTERNAL_COMPILERFLAGS) "$$<" -o "$$@"
+	$$(COMPILER) $$(ALL_COMPILEFLAGS) "$$<" -o "$$@"
 endef
 define GENERATE_INDIVIDUAL_OBJECTS
-$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).o: $(1)
+$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).o: $(1) $(CFLAGS_TMPFILE)
-	$$(COMPILER) $$(COMPILER_FLAGS) $$(INTERNAL_COMPILERFLAGS) "$$<" -o "$$@"
+	$$(COMPILER) $$(ALL_COMPILEFLAGS) "$$<" -o "$$@"
 endef
 
 #Create targets for object files
@@ -173,6 +188,9 @@ clean:
 	$(call rmdir,"$(OBJDIR)")
 	$(call rm,"$(MAIN_EXECUTABLE)")
 	$(call rm,"$(MAIN_EXECUTABLE).exe")
+ifeq ($(SAVECFLAGS),1)
+	$(call rm,"$(CFLAGS_TMPFILE)")
+endif
 
 #header file dep tracking
 -include $(wildcard $(DEPDIR)/*.d)

makefile.library

@@ -37,6 +37,7 @@ SHARED?=1
 STATIC?=0
 RELEASE?=0
 MEMCHK?=0
+SAVECFLAGS?=1
 
 ifneq ($(WINDOWS),1)
 	#*nix settings
@@ -122,6 +123,11 @@ else
 	COMPILER_FLAGS+=-O0 -g3 -ggdb
 endif
 
+ifeq ($(SAVECFLAGS),1)
+	CFLAGS_TMPFILE::=.cflags.tmp
+	OLD_COMPILEFLAGS::=$(file <$(CFLAGS_TMPFILE))
+endif
+
 #add dependency tracking and include directories
 INTERNAL_COMPILERFLAGS=-c $(foreach dir,$(INCLUDE_DIRS),-I"$(dir)") -MMD -MP -MF"$(DEPDIR)/$(notdir $(patsubst %.o,%.d,$@))"
 INTERNAL_LINKFLAGS=$(foreach dir,$(LIBDIRS),-L"$(dir)")
@@ -131,6 +137,8 @@ endif
 THIS_MAKEFILE_NAME::=$(lastword $(MAKEFILE_LIST))
 INTERNAL_SOURCES::=$(SOURCES) $(foreach source,$(SOURCE_DIRS),$(foreach ext,$(EXT),$(wildcard $(source)/*.$(ext))))
 OBJECTS::=$(addprefix $(OBJDIR)/,$(subst \,.,$(subst /,.,$(addsuffix .o,$(INTERNAL_SOURCES)))))
+ALL_COMPILEFLAGS=$(COMPILER_FLAGS) $(INTERNAL_COMPILERFLAGS)
+ALL_LINKFLAGS=$(INTERNAL_LINKFLAGS) $(LDFLAGS)
 
 #Arguments to make submake use this makefile without "Entering directory" stuff
 SUBMAKE_ARGUMENTS::=--no-print-directory -f "$(THIS_MAKEFILE_NAME)"
@@ -140,9 +148,16 @@ define \n
 
 endef
 
+.PHONY: cflags-update
+cflags-update:
+ifeq ($(SAVECFLAGS),1)
+ifneq ($(subst $(DEPDIR)/,$(DEPDIR)/cflags-update,$(ALL_COMPILEFLAGS)),$(OLD_COMPILEFLAGS))
+	$(file >$(CFLAGS_TMPFILE),$(ALL_COMPILEFLAGS))
+endif
+endif
 #default target: run targets in PRE_TARGETS, then build the main library, then POST_TARGETS
 .PHONY: all
-all:
+all: cflags-update
 	$(foreach target,$(PRE_TARGETS),@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(target)"$(\n))
 ifeq ($(SHARED),1)
 ifeq ($(WINDOWS),1)
@@ -162,12 +177,12 @@ endif #static
 ifeq ($(WINDOWS),1)
 #target for windows shared library
 $(DLLOUT): $(OBJECTS)
-	$(COMPILER) -shared -o "$(DLLOUT)" $^ -Wl,--out-implib,"lib$(MAIN_LIBRARY).a" $(SHARED_LIBRARY_FLAGS) $(INTERNAL_LINKFLAGS) $(LDFLAGS) $(LDLIBS)
+	$(COMPILER) -shared -o "$(DLLOUT)" $^ -Wl,--out-implib,"lib$(MAIN_LIBRARY).a" $(SHARED_LIBRARY_FLAGS) $(ALL_LINKFLAGS) $(LDLIBS)
 else #windows
 
 #target for *nix shared library
 $(INTERNAL_SHARED_LIBRARY): $(OBJECTS)
-	$(COMPILER) -shared -o "$@" $^ $(COMPILER_FLAGS) $(SHARED_LIBRARY_FLAGS) $(INTERNAL_LINKFLAGS) $(LDFLAGS) $(LDLIBS)
+	$(COMPILER) -shared -o "$@" $^ $(COMPILER_FLAGS) $(SHARED_LIBRARY_FLAGS) $(ALL_LINKFLAGS) $(LDLIBS)
 endif #windows
 
 #target for static library
@@ -188,12 +203,12 @@ endif
 
 #Object target recipe
 define GENERATE_OBJECTS
-$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).%.o: $(1)/%
+$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).%.o: $(1)/% $(CFLAGS_TMPFILE)
-	$$(COMPILER) $$(COMPILER_FLAGS) $$(INTERNAL_COMPILERFLAGS) "$$<" -o "$$@"
+	$$(COMPILER) $$(ALL_COMPILEFLAGS) "$$<" -o "$$@"
 endef
 define GENERATE_INDIVIDUAL_OBJECTS
-$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).o: $(1)
+$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).o: $(1) $(CFLAGS_TMPFILE)
-	$$(COMPILER) $$(COMPILER_FLAGS) $$(INTERNAL_COMPILERFLAGS) "$$<" -o "$$@"
+	$$(COMPILER) $$(ALL_COMPILEFLAGS) "$$<" -o "$$@"
 endef
 
 
@@ -218,6 +233,9 @@ clean: object_clean
 	$(call rm,"lib$(MAIN_LIBRARY).so")
 	$(call rm,"lib$(MAIN_LIBRARY).a")
 	$(call rm,"$(DLLOUT)")
+ifeq ($(SAVECFLAGS),1)
+	$(call rm,"$(CFLAGS_TMPFILE)")
+endif
 
 #header file dep tracking
 -include $(wildcard $(DEPDIR)/*.d)