ifndef Lib.mak.included Lib.mak.included := 1 # These variables should be provided by the Makefile that include us: # P should be the project name, mostly used to handle include directories # T should be the path to the top-level directory. # S should be sub-directory where the current makefile is, relative to $T. # Verbosity flag (empty show nice messages, non-empty use make messages) # When used internal, $V expand to @ is nice messages should be printed, this # way it's easy to add $V in front of commands that should be silenced when # displaying the nice messages. override V := $(if $V,,@) # honour make -s flag override V := $(if $(findstring s,$(MAKEFLAGS)),,$V) # Flavor (variant), should be one of "dbg", "opt" or "cov" F ?= opt # Use C++ linker by default LINKER := $(CXX) # Default mode used to install files IMODE ?= 0644 # Default install flags IFLAGS ?= -D # Use pre-compiled headers if non-empty GCH ?= # Directories ############## # Base directory where to install files (can be overridden, should be absolute) prefix ?= /usr/local # Path to a complete alternative environment, usually a jail, or an installed # system mounted elsewhere than /. DESTDIR ?= # Use absolute paths to avoid problems with automatic dependencies when # building from subdirectories T := $(abspath $T) # Name of the current directory, relative to $T R := $(subst $T,,$(patsubst $T/%,%,$(CURDIR))) # Base directory where to put variants (Variants Directory) VD ?= $T/build # Generated files top directory G ?= $(VD)/$F # Objects (and other garbage like pre-compiled headers and dependency files) # directory O ?= $G/obj # Binaries directory B ?= $G/bin # Libraries directory L ?= $G/lib # Documentation directory D ?= $(VD)/doc # Installation directory I := $(DESTDIR)$(prefix) # Includes directory INCLUDE_DIR ?= $G/include # Directory of the current makefile (this might not be the same as $(CURDIR) # This variable is "lazy" because $S changes all the time, so it should be # evaluated in the context where $C is used, not here. C = $T/$S # Functions ############ # Compare two strings, if they are the same, returns the string, if not, # returns empty. eq = $(if $(subst $1,,$2),,$1) # Find sources files and get the corresponding object names. The first # argument should be the sources extension ("c" or "cpp" typically). The # second argument is where to search for the sources ($C if omitted). The # resulting files will always have the suffix "o" and the directory rewritten # to match the directory structure (from $T) but in the $O directory. For # example, if $T is "/usr/src", $O is "/tmp/obj", $C is "/usr/src/curr" and it # have 2 C sources: "/usr/src/curr/1.c" and "/usr/src/curr/dir/2.c", the call: # $(call find_objects,c) # Will yield "/tmp/obj/curr/1.o" and "/tmp/obj/curr/dir/2.o". find_objects = $(patsubst $T/%.$1,$O/%.o,$(shell \ find $(if $2,$2,$C) -name '*.$1')) # Find files and get the their file names relative to another directory. The # first argument should be the files suffix (".h" or ".cpp" for example). The # second argument is a directory rewrite, the matched files will be rewriten to # be in the directory specified in this argument (it defaults to the third # argument if omitted). The third argument is where to search for the files # ($C if omitted). find_files = $(patsubst $(if $3,$3,$C)/%$1,$(if $2,$2,$(if $3,$3,$C))/%$1, \ $(shell find $(if $3,$3,$C) -name '*$1')) # Abbreviate a file name. Cut the leading part of a file if it match to the $T # directory, so it can be displayed as if it were a relative directory. Take # just one argument, the file name. abbr_helper = $(subst $T,.,$(patsubst $T/%,%,$1)) abbr = $(if $(call eq,$(call abbr_helper,$1),$1),$1, \ $(addprefix $(shell echo $R | sed 's|/\?\([^/]\+\)/\?|../|g'),\ $(call abbr_helper,$1))) # Execute a command printing a nice message if $V is @. # The first argument is mandatory and it's the command to execute. The second # and third arguments are optional and are the target name and command name to # pretty print. vexec = $(if $V,\ echo ' $(notdir $(if $3,$(strip $3),$(firstword $1))) \ $(call abbr,$(if $2,$(strip $2),$@))' ; )$1 # Same as vexec but it silence the echo command (prepending a @ if $V). exec = $V$(call vexec,$1,$2,$3) # Compile a source file to an object, generating pre-compiled headers and # dependencies. The pre-compiled headers are generated only if the system # includes change. This function is designed to be used as a command in a rule. # It takes one argument only, the type of file to compile (typically "c" or # "cpp"). What to compile and the output files are built using the automatic # variables from a rule. define compile $(if $(GCH),\ $Vif test -f $O/$*.d; then \ tmp=`mktemp`; \ h=`awk -F: '!$$0 {f = 1} $$0 && f {print $$1}' $O/$*.d`; \ grep -h '^#include <' $< $$h | sort -u > "$$tmp"; \ if diff -q -w "$O/$*.$1.h" "$$tmp" > /dev/null 2>&1; \ then \ rm "$$tmp"; \ else \ mv "$$tmp" "$O/$*.$1.h"; \ $(call vexec,$(COMPILE.$1) -o "$O/$*.$1.h.gch" "$O/$*.$1.h",\ $O/$*.$1.h.gch); \ fi \ else \ touch "$O/$*.$1.h"; \ fi \ ) $(call exec,$(COMPILE.$1) -o $@ -MMD -MP $(if $(GCH),-include $O/$*.$1.h) $<) endef # Link object files to build an executable. The objects files are taken from # the prerequisite files ($O/%.o). If in the prerequisite files are shared # objects ($L/lib%.so), they are included as libraries to link to (-l%). This # function is designed to be used as a command in a rule. The output name is # taken from the rule automatic variables. If an argument is provided, it's # included in the link command line. The variable LINKER is used to link the # executable; for example, if you want to link a C++ executable, you should use # LINKER := $(CXX). link = $(call exec,$(LINKER) $(LDFLAGS) $(TARGET_ARCH) -o $@ $1 \ $(patsubst $L/lib%.so,-l%,$(filter %.so,$^)) \ $(foreach obj,$(filter %.o,$^),$(obj))) # Install a file. All arguments are optional. The first argument is the file # mode (defaults to 0644). The second argument are extra flags to the install # command (defaults to -D). The third argument is the source file to install # (defaults to $<) and the last one is the destination (defaults to $@). install_file = $(call exec,install -m $(if $1,$1,0644) $(if $2,$2,-D) \ $(if $3,$3,$<) $(if $4,$4,$@)) # Concatenate variables together. The first argument is a list of variables # names to concatenate. The second argument is an optional prefix for the # variables and the third is the string to use as separator (" ~" if omitted). # For example: # X_A := a # X_B := b # $(call varcat,A B,X_, --) # Will produce something like "a -- b --" varcat = $(foreach v,$1,$($2$v)$(if $3,$3, ~)) # Replace variables with specified values in a template file. The first # argument is a list of make variables names which will be replaced in the # target file. The strings @VARNAME@ in the template file will be replaced # with the value of the make $(VARNAME) variable and the result will be stored # in the target file. The second (optional) argument is a prefix to add to the # make variables names, so if the prefix is PREFIX_ and @VARNAME@ is found in # the template file, it will be replaced by the value of the make variable # $(PREFIX_VARNAME). The third and fourth arguments are the source file and # the destination file (both optional, $< and $@ are used if omitted). The # fifth (optional) argument are options to pass to the substitute sed command # (for example, use "g" if you want to do multiple substitutions per line). replace = $(call exec,sed '$(foreach v,$1,s|@$v@|$($2$v)|$5;)' $(if $3,$3,$<) \ > $(if $4,$4,$@)) # Create a symbolic link to the project under the $(INCLUDE_DIR). The first # argument is the name of symbolic link to create. The link is only created if # it doesn't already exist. symlink_include_dir = $(shell \ test -L $(INCLUDE_DIR)/$1 \ || ln -s $C $(INCLUDE_DIR)/$1 ) # Create a file with flags used to trigger rebuilding when they change. The # first argument is the name of the file where to store the flags, the second # are the flags and the third argument is a text to be displayed if the flags # have changed (optional). This should be used as a rule action or something # where a shell script is expected. gen_rebuild_flags = $(shell if test x"$2" != x"`cat $1 2>/dev/null`"; then \ $(if $3,test -f $1 && echo "$3";) \ echo "$2" > $1 ; fi) # Include sub-directory's Build.mak. The only argument is a list of # subdirectories for which Build.mak should be included. The $S directory is # set properly before including each sub-directory's Build.mak and restored # afterwards. define build_subdir_code _parent__$d__dir_ := $$S S := $$(if $$(_parent__$d__dir_),$$(_parent__$d__dir_)/$d,$d) include $$T/$$S/Build.mak S := $$(_parent__$d__dir_) endef include_subdirs = $(foreach d,$1,$(eval $(build_subdir_code))) # Overridden flags ################## # Warn about everything override CPPFLAGS += -Wall # Use the includes directories to search for includes override CPPFLAGS += -I$(INCLUDE_DIR) # Let the program know where it will be installed override CPPFLAGS += -DPREFIX=$(prefix) # Be standard compliant override CFLAGS += -std=c99 -pedantic override CXXFLAGS += -std=c++98 -pedantic # Use the generated library directory to for libraries override LDFLAGS += -L$L -Wall # Make sure the generated libraries can be found export LD_LIBRARY_PATH := $L:$(LD_LIBRARY_PATH) # Variant flags ################ ifeq ($F,dbg) override CPPFLAGS += -ggdb -DDEBUG endif ifeq ($F,opt) override CPPFLAGS += -O2 -DNDEBUG endif ifeq ($F,cov) override CPPFLAGS += -ggdb -pg --coverage override LDFLAGS += -pg --coverage endif # Automatic dependency handling ################################ # These files are created during compilation. sinclude $(shell test -d $O && find $O -name '*.d') # Default rules ################ # Compile C objects $O/%.o: $T/%.c $G/compile-c-flags $(call compile,c) # Compile C++ objects $O/%.o: $T/%.cpp $G/compile-cpp-flags $(call compile,cpp) # Link binary programs $B/%: $G/link-o-flags $(call link) # Link shared libraries $L/%.so: override CFLAGS += -fPIC $L/%.so: override CXXFLAGS += -fPIC $L/%.so: $G/link-o-flags $(call link,-shared) # Create pkg-config files using a template $L/%.pc: $(call replace,$(PC_VARS),$*-PC-) # Run doxygen to build the documentation. It expects the first prerequisite to # be the Doxyfile to use and the next prerequisites the input files. This rule # is a little restrictive, but you can always make your own if it doesn't fit # your needs ;) $D/%/doxygen-stamp: $V mkdir -p $(@D) $(call exec,(cat $<; \ echo "FULL_PATH_NAMES=YES"; \ echo "INPUT=$(patsubst $(