Generic drop in Makefile

Makefile

VERSION = \"1.0.0\"

PREFIX ?= out
INCDIR	= inc
SRCDIR	= src
LANG	= c
OBJDIR	= .obj

MODULE		= binary_name
CC		= gcc
LDFLAGS		=
CFLAGS		= -I$(INCDIR) -DVERSION=$(VERSION)
RM		= rm
FORMAT		= clang-format
CHECK		= cppcheck
CP		= cp
ECHO		= echo
MKDIR		= mkdir

# This is taken from the kernel build system because I like the way it looks
ifneq ($(silent),1)
  ifneq ($(V),1)
	QUIET_CC       = @echo '  CC      '$@;
	QUIET_CC_FPIC  = @echo '  CC FPIC '$@;
	QUIET_CLANG    = @echo '  CLANG   '$@;
	QUIET_AR       = @echo '  AR      '$@;
	QUIET_LINK     = @echo '  LINK    '$@;
	QUIET_MKDIR    = @echo '  MKDIR   '$@;
	QUIET_GEN      = @echo '  GEN     '$@;
	QUIET_SUBDIR0  = +@subdir=
	QUIET_SUBDIR1  = ;$(NO_SUBDIR) \
			  echo '  SUBDIR  '$$subdir; \
			 $(MAKE) $(PRINT_DIR) -C $$subdir
	QUIET_FLEX     = @echo '  FLEX    '$@;
	QUIET_BISON    = @echo '  BISON   '$@;
	QUIET_GENSKEL  = @echo '  GENSKEL '$@;

	descend = \
		+@echo	       '  DESCEND '$(1); \
		mkdir -p $(OUTPUT)$(1) && \
		$(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)

	QUIET_CLEAN    = @printf '  CLEAN   %s\n' $1;
	QUIET_INSTALL  = @printf '  INSTALL %s\n' $1;
	QUIET_UNINST   = @printf '  UNINST  %s\n' $1;
  endif
endif

ifndef RELEASE_BUILD
	CFLAGS += -DDEBUG_BUILD -Wall -g -fsanitize=address -fno-omit-frame-pointer
else
	CFLAGS += -O2 -DRELEASE_BUILD
	OBJDIR = .objrls
endif

SRC = $(wildcard $(SRCDIR)/*.$(LANG))
OBJ = $(subst $(SRCDIR)/,$(OBJDIR)/,$(patsubst %.$(LANG),%.o,$(SRC)))

default: $(MODULE)

all: $(MODULE)

$(OBJDIR):
	$(QUIET_MKDIR)$(MKDIR) -p $@

$(OBJ): $(OBJDIR)/%.o: $(SRCDIR)/%.$(LANG)
	$(QUIET_CC)$(CC) $(CFLAGS) -c $< -o $@

$(MODULE): $(OBJDIR) $(OBJ)
	$(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $(OBJ) $(LDFLAGS)

run: $(MODULE)
	@./$(MODULE)

clean:
	$(call QUIET_CLEAN, $(MODULE))
	@$(RM) -rf $(OBJ) $(MODULE) $(PREFIX) $(OBJDIR)

fmt:
	@$(FORMAT) -i $(SRCDIR)/*.$(LANG) $(INCDIR)/*.h

check:
	@$(ECHO) "Checking formatting"
	@$(FORMAT) --dry-run -Werror $(SRCDIR)/*.[ch]
	@$(CHECK) -x c --std=c11 -Iinc -i/usr/include --enable=all --suppress=missingIncludeSystem .

install: $(MODULE) $(MANFILES)
	$(call QUIET_INSTALL, $(PREFIX)/bin/$(MODULE))
	@$(MKDIR) -p $(PREFIX)/bin
	@$(CP) $(MODULE) $(PREFIX)/bin/$(MODULE)

.PHONY: $(MODULE) clean all fmt run check install

I think you meant to use LDFLAGS here (https://gist.github.com/LiquidityC/c832cd3d8394f267299d43b1f1719e90#file-makefile-L70).

I'm not sure I follow?

Geez. Totally missed $(LDFLAGS) at the end of the line. My mistake.

To make it cross-compile compatible, you should declare the variable with ?=. That the makefile can grab compiler or the ldflags variables from the environment as exported by the various SDKs (like the yocto one).