X-Git-Url: https://git.llucax.com/software/makeit.git/blobdiff_plain/cd9d10c747bb0098ccadd2d8211796b38f8ea2ef..6a3dc2d69e10a82c9997e57f81f3318aa3aff2ce:/Lib.mak?ds=sidebyside diff --git a/Lib.mak b/Lib.mak index 247cad7..f84d288 100644 --- a/Lib.mak +++ b/Lib.mak @@ -1,10 +1,10 @@ ifndef Lib.mak.included Lib.mak.included := 1 -# These variables should be provided by the includer Makefile: +# 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. -# C should be the path to the current 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 @@ -23,17 +23,17 @@ LINKER := $(CXX) # Default mode used to install files IMODE ?= 0644 -# Degault install flags +# Default install flags IFLAGS ?= -D -# Use precompiled headers if non-empty +# Use pre-compiled headers if non-empty GCH ?= # Directories ############## -# Base directory where to install files (can be overrided, should be absolute) +# 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 @@ -47,13 +47,13 @@ T := $(abspath $T) # Name of the current directory, relative to $T R := $(subst $T,,$(patsubst $T/%,%,$(CURDIR))) -# Base directory where to put variants -D ?= $T/build +# Base directory where to put variants (Variants Directory) +VD ?= $T/build # Generated files top directory -G ?= $D/$F +G ?= $(VD)/$F -# Objects (and other garbage like precompiled headers and dependency files) +# Objects (and other garbage like pre-compiled headers and dependency files) # directory O ?= $G/obj @@ -69,6 +69,11 @@ 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 ############ @@ -77,19 +82,23 @@ INCLUDE_DIR ?= $G/include # 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) -# It expects the variable $T and $O to be defined as commented previously in -# this file. $C should be defined to the path to the current directory relative -# to the top-level. -find_objects = $(patsubst $T/%.$1,$O/%.o,$(shell find $T/$C -name '*.$1')) +# Find sources files and get the corresponding object names. The first +# argument should be the sources extension ("c" or "cpp" typically). The +# second argument is where to search for the sources ($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 sources files and get the corresponding object names # The first argument should be the sources extension ("c" or "cpp" typically) # It expects the variable $T and $O to be defined as commented previously in -# this file. $C should be defined to the path to the current directory relative -# to the top-level. -find_headers = $(patsubst $T/$C/%.$1,$2/%.$1,$(shell find $T/$C -name '*.$1')) +# this file. +find_headers = $(patsubst $C/%.$1,$2/%.$1,$(shell find $C -name '*.$1')) # Abbreviate a file name. Cut the leading part of a file if it match to the $T # directory, so it can be displayed as if it were a relative directory. Take @@ -140,7 +149,7 @@ endef # Link object files to build an executable. The objects files are taken from # the prerequisite files ($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 ouput name is +# 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 @@ -156,15 +165,48 @@ link = $(call exec,$(LINKER) $(LDFLAGS) $(TARGET_ARCH) -o $@ $1 \ 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 symlink to create. The link is only created if it -# doesn't already exist. +# 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 $T/$C $(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" > $1 ; fi) -# Overrided flags +# Overridden flags ################## # Warn about everything @@ -176,7 +218,7 @@ override CPPFLAGS += -I$(INCLUDE_DIR) # Let the program know where it will be installed override CPPFLAGS += -DPREFIX=$(prefix) -# Be standard compilant +# Be standard compliant override CFLAGS += -std=c99 -pedantic override CXXFLAGS += -std=c++98 -pedantic @@ -214,32 +256,47 @@ 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-) + +# Install binary programs $I/bin/%: $(call install_file,0755) +# Install system binary programs $I/sbin/%: $(call install_file,0755) +# Install pkg-config specification files +$I/lib/pkgconfig/%: + $(call install_file) + +# Install libraries $I/lib/%: $(call install_file) .PHONY: clean clean: - $(call exec,$(RM) -r $D,$D) + $(call exec,$(RM) -r $(VD),$(VD)) # Phony rule to uninstall all built targets (like "install", uses $(install)). .PHONY: uninstall @@ -250,7 +307,7 @@ uninstall: # sub-makes to add values to the special variables $(all), after this makefile # was read. .SECONDEXPANSION: - + # Phony rule to make all the targets (sub-makefiles can append targets to build # to the $(all) variable). .PHONY: all @@ -266,8 +323,8 @@ install: $$(install) ################################### # Create $O, $B, $L and $(INCLUDE_DIR) directories and replicate the directory -# structure of the project into $O. Create one symlink "last" to the current -# build directory. +# structure of the project into $O. Create one symbolic link "last" to the +# current build directory. # # NOTE: the second mkdir can yield no arguments if the project don't have any # subdirectories, that's why the current directory "." is included, so it @@ -275,44 +332,33 @@ install: $$(install) setup_build_dir__ := $(shell \ mkdir -p $O $B $L $(INCLUDE_DIR); \ mkdir -p . $(addprefix $O,$(patsubst $T%,%,\ - $(shell find $T -type d -not -path '$D*'))); \ - test -L $D/last || ln -s $F $D/last ) + $(shell find $T -type d -not -path '$(VD)*'))); \ + test -L $(VD)/last || ln -s $F $(VD)/last ) # Automatic rebuilding when flags or commands changes ###################################################### # Re-compile C files if one of this variables changes -COMPILE.c.FLAGS += $(CC) ~ $(CPPFLAGS) ~ $(CFLAGS) ~ $(TARGET_ARCH) ~ $(prefix) +COMPILE.c.FLAGS := $(call varcat,CC CPPFLAGS CFLAGS TARGET_ARCH prefix) # Re-compile C++ files if one of this variables changes -COMPILE.cpp.FLAGS += $(CXX) ~ $(CPPFLAGS) ~ $(CXXFLAGS) ~ $(TARGET_ARCH) \ - ~ $(prefix) +COMPILE.cpp.FLAGS := $(call varcat,CXX CPPFLAGS CXXFLAGS TARGET_ARCH prefix) # Re-link binaries and libraries if one of this variables changes -LINK.o.FLAGS += $(LD) ~ $(LDFLAGS) ~ $(TARGET_ARCH) - -# 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. This should be used as a rule action or something where -# a shell script is expected. -gen_rebuild_flags = if test x"$2" != x"`cat $1 2>/dev/null`"; then \ - test -f $1 && echo "$3"; \ - echo "$2" > $1 ; fi +LINK.o.FLAGS := $(call varcat,LD LDFLAGS TARGET_ARCH) # Create files containing the current flags to trigger a rebuild if they change -setup_flag_files__ := $(shell \ - $(call gen_rebuild_flags,$G/compile-c-flags, \ - $(COMPILE.c.FLAGS),C compiler or flags;); \ - $(call gen_rebuild_flags,$G/compile-cpp-flags, \ - $(COMPILE.cpp.FLAGS),C++ compiler or flags;); \ - $(call gen_rebuild_flags,$G/link-o-flags, \ - $(LINK.o.FLAGS),linker or link flags;) ) +setup_flag_files__ := $(call gen_rebuild_flags,$G/compile-c-flags, \ + $(COMPILE.c.FLAGS),C compiler or flags; ) +setup_flag_files__ := $(setup_flag_files__)$(call gen_rebuild_flags, \ + $G/compile-cpp-flags, $(COMPILE.cpp.FLAGS),C++ compiler or flags; ) +setup_flag_files__ := $(setup_flag_files__)$(call gen_rebuild_flags, \ + $G/link-o-flags, $(LINK.o.FLAGS),linker or link flags; ) # Print any generated message (if verbose) $(if $V,$(if $(setup_flag_files__), \ - $(info !! Something changed: $(setup_flag_files__) \ - re-building affected files...))) + $(info !! Something changed: $(setup_flag_files__)re-building \ + affected files...))) endif