src/Makefile

   1 ################################################################################
   2 # Desc:   Mihrtec Standard Transpilation Makefile
   3 # Author: Mihrtec LLC
   4 # Date:   2016
   5 ################################################################################
   6 # This makefile manages a build environment targeting native platforms with gcc
   7 # and web platforms with either emscripten or binaryen (js or wasm).
   8 ################################################################################
   9 # Each .c file is autopresidential debate california timematically compiled into an environment-dependent object
  10 # file of compiler-specific format (.o for gcc, .bc for llvm/emcc/em++).
  11 ################################################################################
  12 default: all
  13 # Source languages handled by this build system
  14 LANGS      := c cpp go
  15 # Source-to-source languages handled by this build system
  16 SLANGS     := y rl
  17 # Language-specific compilers and flags passed in from environment
  18 c_C        := $(strip $(notdir $(CC)))
  19 c_FLAGS    := $(strip $(CFLAGS)) -I.
  20 c_LIBS     := SDL2 wolfssl
  21 c_SRCL     := y
  22 cpp_C      := $(strip $(notdir $(CXX)))
  23 cpp_FLAGS  := $(strip $(CXXFLAGS)) $(c_FLAGS)
  24 cpp_LIBS   := $(c_LIBS)
  25 go_C       := gccgo
  26 go_FLAGS   := $(c_FLAGS)
  27 # Source to source languages
  28 # Bison
  29 y_C        := bison
  30 y_FLAGS    := -d
  31 y_STEM     := tab
  32 y_TRG      := c h
  33 # Ragel
  34 rl_C        := ragel
  35 rl_FLAGS    := -C
  36 rl_TRG      := c
  37 # Compiler-specific associations.  Each compiler has a binary object suffix
  38 # (OBJ), an archiver (AR), and an archiver object suffix (AROBJ).  Each compiler
  39 # may optionally have defined a linker (LD), and a binary output suffix (OUT).
  40 cc_OBJ     := o
  41 cc_LD      := $(LD)
  42 cc_AR      := $(AR)
  43 cc_AROBJ   := a
  44 cc_DBG     := gdb
  45 $(cpp_C)_LD := $(cc_LD)
  46 gcc_OBJ    := $(cc_OBJ)
  47 gcc_LD     := $(cc_LD)
  48 ngcc_AR     := $(cc_AR)
  49 gcc_AROBJ  := $(cc_AROBJ)
  50 gcc_DBG    := $(cc_DBG)
  51 emcc_OBJ   := bc
  52 emcc_AR    := emar
  53 emcc_AROBJ := $(emcc_OBJ) #emar is just a python script that reparses shit for emcc
  54 emcc_OUT   := .js
  55 g++_OBJ    := $(cc_OBJ)
  56 em++_OBJ   := $(emcc_OBJ)
  57 em++_AR    := $(emcc_AR)
  58 em++_AROBJ := $(emcc_AROBJ)
  59 em++_OUT   := $(emcc_OUT)
  60 gccgo_OBJ  := o
  61 gccgo_LD   := $(cc_LD)
  62 gccgo_AR   := $(cc_AR)
  63 gccgo_AROBJ := $(cc_AROBJ)
  64 # Shell functions to determine what libraries can be linked by the compiler
  65 cc_LDLIBS   := $(shell ls /usr/lib | grep ".o" | sed -e 's@^.*lib\([_\+a-zA-Z0-9\-]*\)\..*@\1@g')
  66 gcc_LDLIBS  := $(cc_LDLIBS)
  67 emcc_LDLIBS :=
  68 g++_LDLIBS  := $(cc_LDLIBS)
  69 em++_LDLIBS :=
  70 go_LDLIBS   := $(cc_LDLIBS)
  71 # Directories
  72 # The directory in './' containing app drivers and compilation info
  73 DRIVER_DIR := bin
  74 ROOT_DIR   := ..
  75 LIB_DIR    := $(ROOT_DIR)/lib$(shell uname -m)/$($(c_C)_OBJ)
  76 LIBDL_DIR  := $(LIB_DIR)/.cache
  77 LIBINC_DIR := $(ROOT_DIR)/include
  78 # The makefile MUST be capable of generating these directories and all of their
  79 # contents.  These directories are removed during the 'scrub' rule
  80 MAKE_DIRS  := $(LIB_DIR) $(LIBDL_DIR) $(LCLLIB_DIR)
  81 # Set up lib inclusions, and scan for built libs
  82 c_FLAGS    += -I$(LIBINC_DIR)
  83 c_OBJ      := $($(c_C)_OBJ)
  84 # Modules are any directories other than 'DRIVER_MODULE' in './' and produce a
  85 # single object file in './' containing all of the module's symbols and
  86 # binaries.
  87 MODULES    := $(filter-out $(DRIVER_DIR),$(subst /,,$(shell ls -d */)))
  88
  89 #AWK_REVERSE_SQUASH##############################################################
  90 # The following awk program reverses the order of a list while also removing
  91 # duplicate entries.  The effect of this when run on the dependency tree is that
  92 # it will remove duplicates occurring in reverse order, allowing the most deeply
  93 # nested libraries to be built, and linked, first. ##############################
  94 define AWK_REVERSE_SQUASH =
  95 awk \
  96 '
  97 { for(i=NF;i>0;i--)
  98     printf (!a[$$i]++) ? $$i FS : "";
  99   i=split("",a);
 100   print ""
 101 }
 102 '
 103 #/AWK_REVERSE_SQUASH#############################################################
 104 endef
 105
 106 #PREMAKE_SOURCE_COMPILER#########################################################
 107 # Compile any source-to-source languages before executing the majority of make ##
 108 #################################################################################
 109 define PREMAKE_SOURCE_COMPILER =
 110 # Find the sources for each source-to-source language
 111 $(foreach slang,$(SLANGS),
 112 $(eval SLANG_SRC := $(patsubst  ./%, %,$(shell find -name "*.$(slang)")))
 113 # Foreach target type in the source-to-source language, add this source's
 114 # targets to the list of the current source-to-source language targets
 115 $(eval undefine SLANG_TRG)
 116 $(eval $(foreach trg,$($(slang)_TRG),
 117 $(eval SLANG_TRG += $(SLANG_SRC:%.$(slang)=%.$(if $($(slang)_STEM),$($(slang)_STEM).)$(trg)))))
 118 # Stat the source file's last-modified time to the var SRC_TIME
 119 $(foreach src,$(SLANG_SRC),
 120 $(eval SRC_TIME := $(shell stat -c %Y $(src)))
 121 # For each of the targets created by this source language, evaluate the
 122 # last-modified times of each potential target.  If the file does not exist, set
 123 # the time to '0', otherwise set it to the -c %Y result from statting the file.
 124 $(foreach srctrg,$(filter $(basename $(src))%, $(SLANG_TRG)),
 125 $(eval TRG_TIMES += $(if $(wildcard $(srctrg)),$(shell stat -c %Y $(srctrg)),0)==$(srctrg)))
 126 # Sort TRG_TIMES, which will produce a list of oldest-first files and timestamps
 127 # of the form [last-modified-deltatime]==[filename]
 128 $(eval TRG_TIMES := $(shell echo $(sort $(TRG_TIMES)) | $(call AWK_REVERSE_SQUASH)))
 129 # Evaluate the newest time from our ordered list by splitting the word up by its
 130 # '==' connectors and looking at the first word
 131 $(eval NEWEST_TRG_TIME := $(word 1,$(subst ==, ,$(TRG_TIMES))))
 132 # Find the older of the two times (between SRC_TIME and NEWEST_TRG_TIME)
 133 $(eval OLDER_TIME := $(firstword $(sort $(NEWEST_TRG_TIME) $(SRC_TIME))))
 134 # If the older of the two times is the newest target time found, then we need to
 135 # rebuild, but only if our build rule intends to actually make something
 136 $(if $(MAKECMDGOALS),
 137 $(eval BUILDGOALS := $(filter-out clean scrub purge uninstall,$(MAKECMDGOALS))),
 138 $(eval BUILDGOALS := all))
 139 $(if $(and $(BUILDGOALS),$(filter $(OLDER_TIME),$(NEWEST_TRG_TIME))),
 140 $(eval SHELL_CMD := cd $(dir $(src)) && $($(slang)_C) $($(slang)_FLAGS) $(notdir $(src)))
 141 $(info $(SHELL_CMD) $(shell $(SHELL_CMD)))
 142 )))
 143 # Put these targets on the MAKE_TARGETS list to be removed during "clean",
 144 # regardless of whether or not they were built just now.
 145 $(eval MAKE_TARGETS += $(SLANG_TRG))
 146 #/PREMAKE_SOURCE_COMPILER########################################################
 147 endef
 148 # Compile a source language to a language that compiles to binary, but only if
 149 # our build rule intends to build some kind of target
 150 $(eval $(call PREMAKE_SOURCE_COMPILER,))
 151
 152
 153 # Backup the CVS password and CVSROOT environment vars in case we change them
 154 $(if $(wildcard ~/.cvspass),\
 155 $(eval CVSPASS_BAK := $(file <~/.cvspass)))
 156 $(if $(CVSROOT),\
 157 $(eval CVSROOT_BAK := $(CVSROOT)))
 158
 159 # A long function definition to grab deps from the source's compiler and route
 160 # errors to /dev/null if the rule generator expresses bogus errors
 161 define SRC_LANG_FLAGS_OPT_DEPS =
 162 $(filter-out \ %:,$(shell $($2_C) $3 $4 -MG $1 2> /dev/null))
 163 endef
 164
 165 #SRC_LANG_RULE###################################################################
 166 # Given a source and a language, generate a rule to make the object.  The second
 167 # invocation of gcc per file lists only its local includes, and filters out
 168 # anything already caught.  Anything remaining should be considered to be
 169 # available in the current working directory of the source file(i.e. if you
 170 # '#include "something.h"' in 'mymodule/horseradish.c', you would expect to
 171 # include 'mymodule/something.h'.  this check lets that happen), otherwise it is
 172 # some kind of user error #######################################################
 173 define SRC_LANG_RULE =
 174 $(if $($1),,$(eval $1 := t)\
 175 $(eval MOD  := $(filter $(MODULES),$(firstword $(subst /, ,$(dir $1)))))\
 176 $(eval FLG  := $(MOD:%=-I% ))\
 177 $(if $(wildcard $1),
 178 $(eval DEPS := $(filter-out \ %:,$(shell $($2_C) $(FLG) -M -MG $1)))\
 179 $(eval MDEPS := $(filter $(MODULES:%=%/%),$(DEPS)))\
 180 $(eval LOST := $(filter-out \ %: $(DRIVER_DIR)/% $(MODULES:%=%/%),$(shell $($2_C) $(FLG) -MM -MG $1)))\
 181 $(eval MDEPS += $(LOST:%=$(dir $1)%))\
 182 $(eval MDEPS := $(shell echo $(MDEPS) | sed -e 's@[a-zA-Z0-9\-\+/]*\.\./include@../include@g'))\
 183 $(eval ALLDEPS := $(MDEPS) $(DEPS)),\
 184 $(error Cannot generate deps for: $1, file not found))\
 185 $(eval SRC_OBJ    := $(basename $1).$($2_OBJ))\
 186 $(eval MAKE_TARGETS+= $(SRC_OBJ))
 187
 188 # Find any deps that aren't built yet, which the compiler has flagged
 189 # as missing, but which we know the expected location of libs for
 190 # this language should have their includes in 'LIBINC_DIR'
 191 $(eval BUILDDEPS := $(filter $($2_LIBS:%=%/%),$(ALLDEPS)))
 192 $(eval ALLDEPS := $(filter-out $(BUILDDEPS),$(ALLDEPS)) $(BUILDDEPS:%=$(LIBINC_DIR)/%))
 193 # Object for $1
 194 $(SRC_OBJ): $(ALLDEPS)
 195         $($2_C) $$($2_FLAGS) $(FLG) -c -o $$@ $1
 196 $(if $($2_DBG),\
 197 $(eval DBG_OBJ    := $(dir $1).$($2_DBG)/$(basename $(notdir $1)).$($2_OBJ))\
 198 $(if $(findstring $(dir $(DBG_OBJ)),$(MAKE_DIRS)),,\
 199 $(eval MAKE_DIRS += $(dir $(DBG_OBJ))))
 200 # Object for $1 with $($2_DBG) symbols
 201 $(DBG_OBJ): $(ALLDEPS) | $(dir $(DBG_OBJ))
 202         $($2_C) $$($2_FLAGS) $(FLG) -Og -g$($2_DBG) -c -o $$@ $1
 203 ))
 204 #/SRC_LANG_RULE##################################################################
 205 endef
 206
 207 #SRC_LANG_DRVRULE################################################################
 208 # establish a build and link rule given a source driver and language ############
 209 define SRC_LANG_DRVRULE =
 210 $(eval DRIVER_NAME  := $(basename $(notdir $1)))
 211 $(eval DRIVER_TARG  := $(1:%.$2=$(ROOT_DIR)/%$($2_OUT)))
 212 $(eval DRIVER_SOB   := $(basename $1).$($2_OBJ))
 213
 214 # Generate a rule for the driver object
 215 $(eval $(call SRC_LANG_RULE,$1,$2))
 216
 217 # Modules can be implicitly specified by a driver if its dependencies include
 218 # ANY files from any module directory.  The 'MDEPS' var is set by SRC_LANG_RULE
 219 # and expresses the dependencies required to build the object file only.
 220 $(foreach module_dep,$(MDEPS),
 221 $(eval DRIVER_MODULES += $(firstword $(subst /, ,$(module_dep))))
 222 )
 223 $(eval DRIVER_MODULES := $(filter-out $(DRIVER_DIR) ..,$(sort $(DRIVER_MODULES))))
 224
 225 # In the event that the driver developer does not wish to include a header to
 226 # any internal modules, the developer may instead create a file with the same
 227 # basename as the driver, but with the '.ld' suffix, which contains a space
 228 # separated list of internal modules to link together during compilation
 229 $(eval DRIVER_MODULES += $(file <$(1:%.$2=%.ld)))
 230
 231 # List of module archives to link together during compilation
 232 $(eval DRIVER_ARCHIVES    := $(DRIVER_MODULES:%=%.$($2_AROBJ)))
 233 $(eval DRIVER_DEPS        := $(DRIVER_SOB) $(DRIVER_ARCHIVES))
 234 $(eval DRIVER_DBGARCHIVES := $(DRIVER_MODULES:%=.$($2_DBG)/%.$($2_AROBJ)))
 235 $(eval DRIVER_DBGDEPS     := $(dir $(DRIVER_SOB)).$($2_DBG)/$(notdir $(DRIVER_SOB)))
 236 $(eval DRIVER_DBGDEPS     += $(DRIVER_DBGARCHIVES))
 237
 238 # If the compiler supports linking, distinguish static from dynamic links,
 239 # otherwise set all libraries to static
 240 $(if $($($2_C)_LD),\
 241 $(eval STLIBS   := $(filter-out $($($2_C)_LDLIBS),$($2_LIBS)))\
 242 $(eval DLIBS    := $(filter-out $(STLIBS),$($2_LIBS))),\
 243 $(eval STLIBS   := $($2_LIBS)))
 244
 245 # Directory setup
 246 $(eval DRIVER_TARG_DIR := $(dir $(1:%.$2=$(ROOT_DIR)/%)))
 247 $(eval MAKE_DIRS       += $(DRIVER_TARG_DIR))
 248 $(if $($2_DBG),$(eval MAKE_DIRS += $(DRIVER_TARG_DIR).$($2_DBG)))
 249
 250 # Setup the sources for this object.  A driver build rule does not include any
 251 # compile steps at all, and so should not contain any sources that are,
 252 # themselves, traditional "source files" like a language-compiled 'c' file.  The
 253 # driver depends on the existence of its equivalent object file (created through
 254 # compilation), which is expected to contain a 'main' function (or entry for
 255 # '_start').  This driver object is then simply linked to its libraries and
 256 # module archives to create an executable binary in the output folder.
 257 # ORDER MATTERS HERE, this is for the linker:
 258 $(eval DRIVER_SRC  := $(DRIVER_DEPS))
 259 $(eval DRIVER_DBGSRC := $(DRIVER_DBGDEPS))
 260 # Iterate through the list of libraries in our language and stack commands from
 261 # left to right in the "sources" section of the LD command (or LD section of the
 262 # commandline for the compiler), to preserve ordering and also ensure that it is
 263 # linked correctly IN THAT ORDER (static vs dynamic).
 264 $(foreach lib,$($2_LIBS),\
 265 $(if $(findstring $(lib),$(STLIBS)),
 266 # Evaluate static lib $(lib) and add it to the dependencies and sources of the rules we built
 267 $(eval STATIC_SRC      := $(LIB_DIR)/lib$(lib).$($2_AROBJ))\
 268 $(eval STATIC_DBGSRC   := $(LIB_DIR)/.$($2_DBG)/lib$(lib).$($2_AROBJ))\
 269 $(eval DRIVER_SRC      := $(STATIC_SRC) $(DRIVER_SRC))\
 270 $(eval DRIVER_DBGSRC   := $(STATIC_DBGSRC) $(DRIVER_DBGSRC))\
 271 $(eval DRIVER_DEPS     += $(STATIC_SRC))\
 272 $(eval DRIVER_DBGDEPS  += $(STATIC_DBGSRC)),
 273 # Add dynamic lib to the sources with a link flag, in its correct ordering
 274 $(eval DRIVER_SRC := -l$(lib) $(DRIVER_SRC))\
 275 $(eval DRIVER_DBGSRC := -l$(lib) $(DRIVER_DBGSRC))\
 276 ))
 277
 278 # Add the driver target to this language's targets for cleaning
 279 $(eval SCRUB_TARGETS  += $(DRIVER_TARG))
 280 $(DRIVER_TARG): $(DRIVER_DEPS) | $(DRIVER_TARG_DIR)
 281         $($2_C) $($2_FLAGS) $(DRIVER_SRC) -o $$@
 282 # Output a rule for building with debug flags
 283 $(eval DRIVER_DBGTARG := $(DRIVER_TARG_DIR)$(basename $(notdir $(DRIVER_TARG)))-d$($2_OUT))
 284 $(eval SCRUB_TARGETS  += $(DRIVER_DBGTARG))
 285 $(eval MAKE_DIRS += $(DRIVER_TARG_DIR).$($2_DBG)/)
 286 $(DRIVER_DBGTARG): $(DRIVER_DBGDEPS) | $(DRIVER_TARG_DIR)
 287         $($2_C) $($2_FLAGS) $(DRIVER_DBGSRC) -o $$@
 288 # Make a rule to run this driver after building
 289 $(DRIVER_NAME)-run: $(DRIVER_TARG)
 290         $(DRIVER_TARG)
 291 $(DRIVER_NAME)-d: $(DRIVER_DBGTARG)
 292
 293 #/SRC_LANG_DRVRULE###############################################################
 294 endef
 295
 296 #MODULE_ARCRULE##################################################################
 297 # generate rule for turning an entire module's collection of binary objects into
 298 # a single locally-linked (no external -L libs) object (for simplified linking
 299 # modules as static libs).#######################################################
 300 define MODULE_ARCRULE =
 301 $(eval ARCDEPS := $(filter $1/%.$(c_OBJ),$(foreach lang,$(LANGS),$($(lang)_MOD_TRG))))\
 302 $(eval MAKE_TARGETS+= $1.$(c_AROBJ))\
 303
 304 $1.$(c_AROBJ): $(ARCDEPS)
 305         $(c_AR) cr $$@ $$^
 306 $(if $(c_DBG),
 307 $(eval undefine DBGARCDEPS)
 308 $(foreach arcdep,$(ARCDEPS),$(eval DBGARCDEPS += $(dir $(arcdep)).$(c_DBG)/$(notdir $(arcdep))))
 309 $(eval MAKE_TARGETS+= .$(c_DBG)/$1.$(c_AROBJ))\
 310
 311 .$(c_DBG)/$1.$(c_AROBJ): $(DBGARCDEPS) | .$(c_DBG)/
 312         $(c_AR) cr $$@ $$^
 313 )
 314 #/MODULE_ARCRULE#################################################################
 315 endef
 316
 317 # LANG_LIB_PARENT_BUILDRULE######################################################
 318 # define rules for creating unknown libraries in the local build environment for
 319 # either binary or bytecode representation given a library name and, optionally,
 320 # a parent lib that included it for error reporting #############################
 321 define LANG_LIB_PARENT_BUILDRULE =
 322 $(eval CONF_FLAG := --prefix=$(abspath $(LIB_DIR)).trash)
 323 $(eval CONF_FLAG += --includedir=$(abspath $(LIBINC_DIR)))
 324 # Setup installation rule steps for this lib
 325 $(eval
 326 BUILDSTEPS := $(if $(AUTOGEN),$(AUTOGEN) && )
 327 BUILDSTEPS += $(if $(CONFIGURE),$(CONFIGURE) $(CONF_FLAG) --libdir=$(abspath $(LIB_DIR)) && )
 328 $(if $(MKCMD),\
 329 BUILDSTEPS += $(MKCMD),
 330 $(error $2.mk requires a valid MKCMD definition))
 331 $(if $(MKINSTALL),\
 332 INSTALLCMD := $(MKINSTALL),\
 333 $(error $2.mk requires a valid MKINSTALL definition))
 334 CLEANCMD   := $(MKCLEAN)
 335 )
 336 # Construct the download method, or error if there isn't a valid one
 337 $(if $(GITADDR),$(eval LIBDL := git clone $(GITADDR) $2),\
 338 $(if $(HGADDR),$(eval LIBDL  := hg clone $(HGADDR) $2),\
 339 $(if $(CVSADDR),\
 340 $(eval LIBDL := export CVSROOT=$(CVSADDR))\
 341 $(eval LIBDL += && echo '$(CVSPASS)' > ~/.cvspass)\
 342 $(eval LIBDL += && cvs $($2_CVSGET))
 343 $(eval LIBDL += && $(if $(CVSPASS_BAK),echo $(CVSPASS_BAK) > ~/.cvspass,rm ~/.cvspass)),\
 344 $(if $(WEBADDR),$(eval LIBDL := wget -O $(WEBTARG) $(WEBADDR)),\
 345 $(eval $(error No way to download $2 needed by $3 for $1 language ))))))
 346 # '$2' Download Rule
 347 $(LIBDL_DIR)/$2:
 348         mkdir -p $$@
 349         cd $(LIBDL_DIR) && $(LIBDL) $(if $(WEBINIT),&& $(WEBINIT))
 350 # '$2' Make and install rule, and ensure it isn't marked "clean"
 351 $(LIB_DIR)/lib$2.$($1_AROBJ): $(LIBDEPS:%=$(LIB_DIR)/lib%.$($1_AROBJ)) | $(LIBDL_DIR)/$2
 352         @mkdir -p $(LIB_DIR)
 353         cd $(LIBDL_DIR)/$2 && export LD_RUN_PATH=$(LIBLDPATH) && $(BUILDSTEPS)
 354         cd $(LIBDL_DIR)/$2 && $(INSTALLCMD)
 355         @rm -f $(LIBDL_DIR)/$2.clean
 356
 357 # '$2' Rule for building under debug mode
 358 $(if $($1_DBG),\
 359 $(eval LIBDBG_DIR := $(LIB_DIR)/.$($1_DBG))\
 360 $(eval $(if $(findstring $(LIBDBG_DIR),$(MAKE_DIRS)),,MAKE_DIRS += $(LIBDBG_DIR)))\
 361 $(eval LIBDBG_TARG := $(LIBDBG_DIR)/lib$2.$($1_AROBJ))\
 362 $(eval LIBDBG_DEPS := $(LIBDEPS:%=$(LIB_DIR)/.$($1_DBG)/lib%.$($1_AROBJ)))\
 363 $(eval DBGBUILDSTEPS := $(if $(AUTOGEN),$(if $(AUTOGENDBG),$(AUTOGENDBG),$(AUTOGEN)) && ))\
 364 $(eval DBGBUILDSTEPS += $(if $(CONFIGURE),$(if $(CONFIGUREDBG),$(CONFIGUREDBG),$(CONFIGURE)) $(CONF_FLAG) --libdir=$(abspath $(LIB_DIR))/.$($1_DBG)))\
 365 $(eval DBGBUILDSTEPS += $(if $(MKDBGCMD),$(MKDBGCDM),$(MKCMD)))\
 366
 367 # '$2' Make and install rule for debugging
 368 $(LIBDBG_TARG): $(LIBDBG_DEPS) | $(LIBDL_DIR)
 369         @mkdir -p $(LIBDBG_DIR)
 370         cd $(LIBDL_DIR)/$2 && export LD_RUN_PATH=$(LIBLDPATH:$(LIB_DIR)%=$(LIBDBG_DIR)) && $(DBGBUILDSTEPS)
 371         cd $(LIBDL_DIR)/$2 && $(INSTALLCMD)
 372         @rm -f $(LIBDL_DIR)/$2.clean
 373 )
 374
 375 # '$2' Clean rule - drop a marker in the directory so we don't bother cleaning
 376 # things that are clean... by default there is no real way of tracking this in a
 377 # makefile
 378 clean_$2:
 379         $$(if $$(wildcard $(LIBDL_DIR)/$2),$$(if $$(wildcard $(LIBDL_DIR)/$2.clean),,\
 380         cd $(LIBDL_DIR)/$2 && $(CLEANCMD) && touch $(abspath $(LIBDL_DIR))/$2.clean))
 381
 382 #/LANG_LIB_PARENT_BUILDRULE######################################################
 383 endef
 384
 385
 386 #LANG_LIB_INIT###################################################################
 387 # For every library in this language, we need to determine how, and if, to link
 388 # its data.  This could potentially be done recursively as libraries have
 389 # dependencies upon each other.  We call a recursive macro here to expand out
 390 # all the libs for this language, and then flatten the tree by removing
 391 # duplicates with shell commands.  We can't use make's 'sort' function because
 392 # we actually care about the ordering so that interdependent libraries can link
 393 # back up the tree ##############################################################
 394 define LANG_LIB_INIT =
 395 # Initialize per-library data, then import data from an accompanying file that
 396 # can overwrite these vars
 397 $(eval
 398 # Implicit defaults for lib.mk files
 399 AUTOGEN    := ./autogen.sh
 400 AUTOGENDBG := ./autogen.sh --enable-debug
 401 CONFIGURE  := ./configure
 402 MKCMD      := make -k
 403 MKINSTALL  := make -k install
 404 MKCLEAN    := make clean
 405 MKDBGCMD   := make -k
 406 LIBDEPS    :=
 407 LIBLANGS   := c cpp go
 408 LIBLDPATH  := $(if $($($1_C)_LD),$(if $(LD_LIBRARY_PATH),$(LD_LIBRARY_PATH):,/usr/lib:)$(abspath $(LIB_DIR)))
 409 # One of these must be defined in the .mk file imported
 410 $(foreach var, GITADDR WEBADDR HGADDR CVSADDR,\
 411 $(eval undefine $(var)))
 412 # Other, optional, variables to clear
 413 $(foreach var, WEBTARG WEBINIT CVSGET CVSPASS CONFIGUREDBG,
 414 $(eval undefine $(var)))
 415 )
 416 # Include and evaluate such that it may be called and evaluated for immediate
 417 # evaluation of its contents
 418 define EVALINCLUDE =
 419 $(eval include $2.mk)
 420 endef
 421 # If there is a .mk file for this lib, import it.  Otherwise, we'll try to link
 422 # it later, unless there is no linker for the language's compiler.
 423 $(if $(wildcard $2.mk),$(eval $(file <$2.mk)),\
 424 $(if $($($1_C)_LD),\
 425 $(warning No $2.mk for lib$2, attempting to link from the system),\
 426 $(error No $2.mk for lib$2 and '$($1_C)' is not configured for linking)))\
 427
 428 # Add dependencies we found (potentially recursively, ignore repeats until later
 429 # so we can preserve ordering information for interdependency build ordering)
 430 $(if $(LIBDEPS),\
 431 $(eval $1_LIBS += $(LIBDEPS)))
 432 # languages that can link this library (typically any lang that shares the
 433 # object format (ELF by default, but this is compiler-dependent (e.g. emcc uses
 434 # llvm bitcode, which is just an intermediary representation of data that can
 435 # link to anything else statically, or as an archive)))
 436 $(if $(findstring $1,$(LIBLANGS)),,\
 437 $(error $2.mk must specifically set LIBLANGS := $1 if it is compatible with $1))
 438 # Mark this lib as available for all its other compatible languages.  This list
 439 # is assumed to be sorted later, so we will ignore repeats for speed
 440 $(foreach lang,$(LIBLANGS),\
 441 $(if $(findstring $2,$($(lang)_LIBS)),,\
 442 $(eval $(lang)_LIBS += $2)))
 443 # Generate a build rule for this lib, unless it's already built
 444 $(if $(findstring $2,$(BUILTLIBS)),,\
 445 $(eval $(call LANG_LIB_PARENT_BUILDRULE,$1,$2,$3))\
 446 $(eval BUILTLIBS += $2))
 447 # Recurse this function for every libdep encountered
 448 $(foreach libdep,$(LIBDEPS),\
 449 $(call LANG_LIB_INIT,$1,$(libdep),$2))
 450 #/LANG_LIB_INIT#################################################################
 451 endef
 452
 453 # Initialize data for supported lanaguages ######################################
 454 define LANG_INIT =
 455 $(eval
 456 $1_OBJ     := $($($1_C)_OBJ)
 457 $1_OUT     := $($($1_C)_OUT)
 458 $1_AROBJ   := $($($1_C)_AROBJ)
 459 $1_SOURCES := $(subst ./,,$(shell find -name "*.$1"))
 460 $1_DBG     := $($($1_C)_DBG)
 461 $1_AR      := $($($1_C)_AR)
 462 )
 463 # Find save language-specific driver and module sources and targets
 464 $(eval $1_DRV_SRC := $(filter $(DRIVER_DIR)/%,$($1_SOURCES)))
 465 $(eval $1_DRV_TRG := $(patsubst %.$1,$(ROOT_DIR)/%$($1_OUT),$($1_DRV_SRC)))
 466 $(eval $1_MOD_SRC := $(filter-out $(DRIVER_DIR)/%,$($1_SOURCES)))
 467 $(eval $1_MOD_TRG := $(subst .$1,.$($1_OBJ),$($1_MOD_SRC)))
 468 # Add those sources and targets to a language-irreverant var
 469 $(eval
 470 DRV_SRC    += $($1_DRV_SRC)
 471 DRV_TRG    += $($1_DRV_TRG)
 472 MOD_SRC    += $($1_MOD_SRC)
 473 MOD_TRG    += $($1_MOD_TRG)
 474 )\
 475 # First, initialize language-module, module, and language relative data.  Then,
 476 # filter out each source file from the module and generate Dependency Rules and
 477 # Module Object Rules for each of them.
 478 $(foreach module,$(MODULES),
 479 # Evaluate the module sources for this language
 480 $(eval $(module)_$1_SRC := $(filter $(module)/%,$($1_MOD_SRC)))
 481 # Evaluate module targets for this language
 482 $(eval $(module)_$1_TRG := $($(module)_$1_SRC:%.$1=%.$($1_OBJ)))
 483 # Add these language-specific sources and targets to the module's src/targs
 484 $(eval
 485 $(module)_SRC += $($(module)_$1_SRC)
 486 $(module)_TRG += $($(module)_$1_TRG)
 487 )
 488 # For every source file, create a build rule for it for our language
 489 $(foreach src,$(filter $(module)/%,$($1_MOD_SRC)),\
 490 $(eval $(call SRC_LANG_RULE,$(src),$1))\
 491 ))
 492 # For all the listed libraries, initialize the library, which will set up all of
 493 # its local ($1_LIBS, etc) data
 494 $(foreach lib,$($1_LIBS),\
 495 $(eval $(call LANG_LIB_INIT,$1,$(lib),$1)))
 496 # The initializer produces an ordered list of interlinked dependencies in groups
 497 # by depth, so when reading backwards and compressing repeats we are left with a
 498 # reliable build order for library interlinking.  this awk program just looks
 499 # through a list of space separated words backwards failing to print when it
 500 # encounters a repeat
 501 $1_LIBS := $(shell echo "$($1_LIBS)" | $(call AWK_REVERSE_SQUASH))
 502 #/LANG_INIT######################################################################
 503 endef
 504
 505 # The recursive library dependecy traversal constructs a tree ordered by nested
 506 # dependency depth.  when linking, this order is reversed.
 507 # Initialize each language and look for its files
 508 $(eval $(foreach lang,$(LANGS),\
 509 $(eval $(call LANG_INIT,$(lang)))\
 510 $(eval $(lang)_LIBS := $(shell echo $($(lang)_LIBS) | $(call AWK_REVERSE_SQUASH)))\
 511 ))
 512
 513 # Create module object rules for each module
 514 $(foreach module,$(MODULES),\
 515 $(eval $(call MODULE_ARCRULE,$(module)))\
 516 )
 517 $(if $(c_DBG),$(eval MAKE_DIRS += .$(c_DBG)/))
 518
 519 # Create lang-specific rules for producing final (linked) targets
 520 $(foreach lang,$(LANGS),\
 521 $(foreach drvsrc,$($(lang)_DRV_SRC),\
 522 $(eval $(call SRC_LANG_DRVRULE,$(drvsrc),$(lang)))\
 523 ))
 524
 525 # Create driver rules for each driver we found, let users call make specifying
 526 # the basename of the driver file, and just route to the correct linkrule we
 527 # made in the last paragraph
 528 DRV_FNAMES := $(notdir $(DRV_SRC))
 529 .PHONY: all $(basename $(DRV_NAMES))
 530 $(foreach fname,$(DRV_FNAMES),\
 531 $(eval $(basename $(fname)): \
 532 $(filter %/$(basename $(fname))$($(lastword $(subst ., ,$(fname))_OUT)),$(DRV_TRG)))\
 533 )
 534 all: $(basename $(DRV_FNAMES))
 535         @echo Build Complete
 536
 537 # Rule to make any dirs that we're in charge of
 538 $(sort $(MAKE_DIRS)):
 539         @mkdir -p $@
 540
 541 # Cleaning rules.
 542 # Clean destroys all object files and internal module archives.
 543 CLEAN_TARGETS := $(sort $(foreach mtarg,$(MAKE_TARGETS),$(if $(wildcard $(mtarg)),$(mtarg))))
 544 clean: $(BUILTLIBS:%=clean_%)
 545         $(if $(CLEAN_TARGETS),rm $(CLEAN_TARGETS))
 546
 547 # Scrub destroys all distributable binaries
 548 SCRUB_TARGETS := $(sort $(foreach starg,$(SCRUB_TARGETS),$(if $(wildcard $(starg)),$(starg))))
 549 scrub: clean
 550         $(if $(SCRUB_TARGETS),rm $(SCRUB_TARGETS))
 551
 552 # Purge destroys all distributables created by a distributable binary
 553 # (e.g. assets)
 554
 555 # Uninstall destroys all objects and directories that cannot be recreated by
 556 # this make file
 557 uninstall: scrub
 558         rm -Rf $(MAKE_DIRS)