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
# Use C++ linker by default
LINKER := $(CXX)
-# Use precompiled headers if non-empty
+# 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
-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
# Libraries directory
L ?= $G/lib
+# 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 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'))
+# 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
# just one argument, the file name.
-abbr = $(addprefix $(shell echo $R | sed 's|/\?\([^/]\+\)/\?|../|g'),\
- $(subst $T,.,$(patsubst $T/%,%,$1)))
+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
$Vif test -f $O/$*.d; then \
tmp=`mktemp`; \
h=`awk -F: '!$$0 {f = 1} $$0 && f {print $$1}' $O/$*.d`; \
- grep -h '^#include <' $(call abbr,$<) $$h | sort -u > "$$tmp"; \
- if diff -q -w "$(call abbr,$O/$*.$1.h)" "$$tmp" > /dev/null 2>&1; \
+ grep -h '^#include <' $< $$h | sort -u > "$$tmp"; \
+ if diff -q -w "$O/$*.$1.h" "$$tmp" > /dev/null 2>&1; \
then \
rm "$$tmp"; \
else \
- mv "$$tmp" "$(call abbr,$O/$*.$1.h)"; \
+ mv "$$tmp" "$O/$*.$1.h"; \
$(call vexec,$(COMPILE.$1) -o "$O/$*.$1.h.gch" "$O/$*.$1.h",\
$O/$*.$1.h.gch); \
fi \
else \
- touch "$(call abbr,$O/$*.$1.h)"; \
+ touch "$O/$*.$1.h"; \
fi \
)
$(call exec,$(COMPILE.$1) -o $@ -MMD -MP $(if $(GCH),-include $O/$*.$1.h) $<)
# Link object files to build an executable. The objects files are taken from
# the prerequisite files ($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
$(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 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" > $1 ; fi)
-# Overrided flags
+# Overridden flags
##################
# Warn about everything
# Use the includes directories to search for includes
override CPPFLAGS += -I$(INCLUDE_DIR)
-# Be standard compilant
+# 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
endif
-# 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)
-
-# Re-compile C++ files if one of this variables changes
-COMPILE.cpp.FLAGS := $(CXX) ~ $(CPPFLAGS) ~ $(CXXFLAGS) ~ $(TARGET_ARCH)
-
-# Re-link binaries and libraries if one of this variables changes
-LINK.o.FLAGS := $(LD) ~ $(LDFLAGS) ~ $(TARGET_ARCH)
-
-
# Automatic dependency handling
################################
# 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
+uninstall:
+ $V$(foreach i,$(install),$(call vexec,$(RM) $i,$i);)
# These rules use the "Secondary Expansion" GNU Make feature, to allow
# 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
all: $$(all)
+# Phony rule to install all built targets (sub-makefiles can append targets to
+# build to the $(install) variable).
+.PHONY: install
+install: $$(install)
+
# Create build directory structure
###################################
-# 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
-
# 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. It update the flags files to detect flag and/or compiler
-# changes to force a rebuild.
+# 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
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*'))); \
- $(call gen_rebuild_flags,$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;); \
- 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 := $(call varcat,CC CPPFLAGS CFLAGS TARGET_ARCH prefix)
+
+# Re-compile C++ files if one of this variables changes
+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 := $(call varcat,LD LDFLAGS TARGET_ARCH)
+
+# Create files containing the current flags to trigger a rebuild if they change
+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_build_dir__), \
- $(info !! Something changed: $(setup_build_dir__) \
- re-building affected files...)))
+$(if $V,$(if $(setup_flag_files__), \
+ $(info !! Something changed: $(setup_flag_files__)re-building \
+ affected files...)))
endif
projects / software / makeit.git / blobdiff