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)" -not -name ".*")))
 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 $(foreach trg,$($(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 # Establish a command to run for compiling this file
 121 $(eval SHELL_CMD := cd $(dir $(src)) && $($(slang)_C) $($(slang)_FLAGS) $(notdir $(src)))
 122 # Evaluate missing targets
 123 $(eval FOUND_TRG := $(shell find $(dir $(src)) -name "$(basename $(notdir $(src))).*" -not -name ".*"))
 124 $(eval MISSING_TRG := $(filter-out $(FOUND_TRG), $(SLANG_TRG)))
 125 # Check timings of existing files
 126 $(eval SRC_TIME := $(shell stat -c %Y $(src)))
 127 # For each of the targets created by this source language, evaluate the
 128 # last-modified times of each potential target.  If the file does not exist, set
 129 # the time to '0', otherwise set it to the -c %Y result from statting the file.
 130 $(foreach srctrg,$(filter $(basename $(src))%, $(SLANG_TRG)),
 131 $(eval TRG_TIMES += $(if $(wildcard $(srctrg)),$(shell stat -c %Y $(srctrg)),0)==$(srctrg)))
 132 # Sort TRG_TIMES, which will produce a list of oldest-first files and timestamps
 133 # of the form [last-modified-deltatime]==[filename]
 134 $(eval TRG_TIMES := $(shell echo $(sort $(TRG_TIMES)) | $(call AWK_REVERSE_SQUASH)))
 135 # Evaluate the newest time from our ordered list by splitting the word up by its
 136 # '==' connectors and looking at the first word
 137 $(eval NEWEST_TRG_TIME := $(word 1,$(subst ==, ,$(TRG_TIMES))))
 138 # Find the older of the two times (between SRC_TIME and NEWEST_TRG_TIME)
 139 $(eval OLDER_TIME := $(firstword $(sort $(NEWEST_TRG_TIME) $(SRC_TIME))))
 140 # If the older of the two times is the newest target time found, then we need to
 141 # rebuild, but only if our build rule intends to actually make something.  If it
 142 # does not intend to make something, drop a functional rule to actually make the
 143 # target
 144 $(if $(MAKECMDGOALS),
 145 $(eval BUILDGOALS := $(filter-out clean scrub purge uninstall,$(MAKECMDGOALS))),
 146 $(eval BUILDGOALS := all))
 147 $(if $(or $(MISSING_TRG), $(and $(BUILDGOALS),$(filter $(OLDER_TIME),$(NEWEST_TRG_TIME)))),
 148 $(if $(findstring n,$(MAKEFLAGS)),
 149 $(SLANG_TRG):
 150         $(SHELL_CMD)
 151 ,
 152 $(info $(SHELL_CMD) $(eval $(shell $(SHELL_CMD)))))
 153 ))
 154 # Put these targets on the MAKE_TARGETS list to be removed during "clean",
 155 # regardless of whether or not they were built just now.
 156 $(eval MAKE_TARGETS += $(SLANG_TRG))
 157 )
 158 #/PREMAKE_SOURCE_COMPILER########################################################
 159 endef
 160 # Compile a source language to a language that compiles to binary, but only if
 161 # our build rule intends to build some kind of target
 162 $(eval $(call PREMAKE_SOURCE_COMPILER,))
 163
 164
 165 # Backup the CVS password and CVSROOT environment vars in case we change them
 166 $(if $(wildcard ~/.cvspass),\
 167 $(eval CVSPASS_BAK := $(file <~/.cvspass)))
 168 $(if $(CVSROOT),\
 169 $(eval CVSROOT_BAK := $(CVSROOT)))
 170
 171 # A long function definition to grab deps from the source's compiler and route
 172 # errors to /dev/null if the rule generator expresses bogus errors
 173 define SRC_LANG_FLAGS_OPT_DEPS =
 174 $(filter-out \ %:,$(shell $($2_C) $3 $4 -MG $1 2> /dev/null))
 175 endef
 176
 177 #SRC_LANG_RULE###################################################################
 178 # Given a source and a language, generate a rule to make the object.  The second
 179 # invocation of gcc per file lists only its local includes, and filters out
 180 # anything already caught.  Anything remaining should be considered to be
 181 # available in the current working directory of the source file(i.e. if you
 182 # '#include "something.h"' in 'mymodule/horseradish.c', you would expect to
 183 # include 'mymodule/something.h'.  this check lets that happen), otherwise it is
 184 # some kind of user error #######################################################
 185 define SRC_LANG_RULE =
 186 $(if $($1),,$(eval $1 := t)\
 187 $(eval MOD  := $(filter $(MODULES),$(firstword $(subst /, ,$(dir $1)))))\
 188 $(eval FLG  := $(MOD:%=-I% ))\
 189 $(if $(wildcard $1),
 190 $(eval DEPS := $(filter-out \ %:,$(shell $($2_C) $(FLG) -M -MG $1)))\
 191 $(eval MDEPS := $(filter $(MODULES:%=%/%),$(DEPS)))\
 192 $(eval LOST := $(filter-out \ %: $(DRIVER_DIR)/% $(MODULES:%=%/%),$(shell $($2_C) $(FLG) -MM -MG $1)))\
 193 $(eval MDEPS += $(LOST:%=$(dir $1)%))\
 194 $(eval MDEPS := $(shell echo $(MDEPS) | sed -e 's@[a-zA-Z0-9\-\+/]*\.\./include@../include@g'))\
 195 $(eval ALLDEPS := $(MDEPS) $(DEPS)),\
 196 $(error Cannot generate deps for: $1, file not found))\
 197 $(eval SRC_OBJ    := $(basename $1).$($2_OBJ))\
 198 $(eval MAKE_TARGETS += $(SRC_OBJ))
 199 # Assume that lost dependencies are in the folder with the source
 200 $(foreach lost,$(LOST),
 201 $(eval ALLDEPS := $(subst  $(lost), $(dir $1)$(lost),$(ALLDEPS))))
 202
 203 # Find any deps that aren't built yet, which the compiler has flagged
 204 # as missing, but which we know the expected location of libs for
 205 # this language should have their includes in 'LIBINC_DIR'
 206 $(eval BUILDDEPS := $(filter $($2_LIBS:%=%/%),$(ALLDEPS)))
 207 $(eval ALLDEPS := $(filter-out $(BUILDDEPS),$(ALLDEPS)) $(BUILDDEPS:%=$(LIBINC_DIR)/%))
 208 # Object for $1
 209 $(SRC_OBJ): $(ALLDEPS)
 210         $($2_C) $$($2_FLAGS) $(FLG) -c -o $$@ $1
 211 $(if $($2_DBG),\
 212 $(eval DBG_OBJ    := $(dir $1).$($2_DBG)/$(basename $(notdir $1)).$($2_OBJ))\
 213 $(if $(findstring $(dir $(DBG_OBJ)),$(MAKE_DIRS)),,\
 214 $(eval MAKE_DIRS += $(dir $(DBG_OBJ))))
 215 $(eval MAKE_TARGETS += $(DBG_OBJ))
 216 # Object for $1 with $($2_DBG) symbols
 217 $(DBG_OBJ): $(ALLDEPS) | $(dir $(DBG_OBJ))
 218         $($2_C) $$($2_FLAGS) $(FLG) -Og -g$($2_DBG) -c -o $$@ $1
 219 ))
 220 #/SRC_LANG_RULE##################################################################
 221 endef
 222
 223 #SRC_LANG_DRVRULE################################################################
 224 # establish a build and link rule given a source driver and language ############
 225 define SRC_LANG_DRVRULE =
 226 $(eval DRIVER_NAME  := $(basename $(notdir $1)))
 227 $(eval DRIVER_TARG  := $(1:%.$2=$(ROOT_DIR)/%$($2_OUT)))
 228 $(eval DRIVER_SOB   := $(basename $1).$($2_OBJ))
 229
 230 # Generate a rule for the driver object
 231 $(eval $(call SRC_LANG_RULE,$1,$2))
 232
 233 # Modules can be implicitly specified by a driver if its dependencies include
 234 # ANY files from any module directory.  The 'MDEPS' var is set by SRC_LANG_RULE
 235 # and expresses the dependencies required to build the object file only.
 236 $(foreach module_dep,$(MDEPS),
 237 $(eval DRIVER_MODULES += $(firstword $(subst /, ,$(module_dep))))
 238 )
 239 $(eval DRIVER_MODULES := $(filter-out $(DRIVER_DIR) ..,$(sort $(DRIVER_MODULES))))
 240
 241 # In the event that the driver developer does not wish to include a header to
 242 # any internal modules, the developer may instead create a file with the same
 243 # basename as the driver, but with the '.ld' suffix, which contains a space
 244 # separated list of internal modules to link together during compilation
 245 $(eval DRIVER_MODULES += $(file <$(1:%.$2=%.ld)))
 246
 247 # List of module archives to link together during compilation
 248 $(eval DRIVER_ARCHIVES    := $(DRIVER_MODULES:%=%.$($2_AROBJ)))
 249 $(eval DRIVER_DEPS        := $(DRIVER_SOB) $(DRIVER_ARCHIVES))
 250 $(eval DRIVER_DBGARCHIVES := $(DRIVER_MODULES:%=.$($2_DBG)/%.$($2_AROBJ)))
 251 $(eval DRIVER_DBGDEPS     := $(dir $(DRIVER_SOB)).$($2_DBG)/$(notdir $(DRIVER_SOB)))
 252 $(eval DRIVER_DBGDEPS     += $(DRIVER_DBGARCHIVES))
 253
 254 # If the compiler supports linking, distinguish static from dynamic links,
 255 # otherwise set all libraries to static
 256 $(if $($($2_C)_LD),\
 257 $(eval STLIBS   := $(filter-out $($($2_C)_LDLIBS),$($2_LIBS)))\
 258 $(eval DLIBS    := $(filter-out $(STLIBS),$($2_LIBS))),\
 259 $(eval STLIBS   := $($2_LIBS)))
 260
 261 # Directory setup
 262 $(eval DRIVER_TARG_DIR := $(dir $(1:%.$2=$(ROOT_DIR)/%)))
 263 $(eval MAKE_DIRS       += $(DRIVER_TARG_DIR))
 264 $(if $($2_DBG),$(eval MAKE_DIRS += $(DRIVER_TARG_DIR).$($2_DBG)))
 265
 266 # Setup the sources for this object.  A driver build rule does not include any
 267 # compile steps at all, and so should not contain any sources that are,
 268 # themselves, traditional "source files" like a language-compiled 'c' file.  The
 269 # driver depends on the existence of its equivalent object file (created through
 270 # compilation), which is expected to contain a 'main' function (or entry for
 271 # '_start').  This driver object is then simply linked to its libraries and
 272 # module archives to create an executable binary in the output folder.
 273 # ORDER MATTERS HERE, this is for the linker:
 274 $(eval DRIVER_SRC  := $(DRIVER_DEPS))
 275 $(eval DRIVER_DBGSRC := $(DRIVER_DBGDEPS))
 276 # Iterate through the list of libraries in our language and stack commands from
 277 # left to right in the "sources" section of the LD command (or LD section of the
 278 # commandline for the compiler), to preserve ordering and also ensure that it is
 279 # linked correctly IN THAT ORDER (static vs dynamic).
 280 $(foreach lib,$($2_LIBS),\
 281 $(if $(findstring $(lib),$(STLIBS)),
 282 # Evaluate static lib $(lib) and add it to the dependencies and sources of the rules we built
 283 $(eval STATIC_SRC      := $(LIB_DIR)/lib$(lib).$($2_AROBJ))\
 284 $(eval STATIC_DBGSRC   := $(LIB_DIR)/.$($2_DBG)/lib$(lib).$($2_AROBJ))\
 285 $(eval DRIVER_SRC      := $(STATIC_SRC) $(DRIVER_SRC))\
 286 $(eval DRIVER_DBGSRC   := $(STATIC_DBGSRC) $(DRIVER_DBGSRC))\
 287 $(eval DRIVER_DEPS     += $(STATIC_SRC))\
 288 $(eval DRIVER_DBGDEPS  += $(STATIC_DBGSRC)),
 289 # Add dynamic lib to the sources with a link flag, in its correct ordering
 290 $(eval DRIVER_SRC := -l$(lib) $(DRIVER_SRC))\
 291 $(eval DRIVER_DBGSRC := -l$(lib) $(DRIVER_DBGSRC))\
 292 ))
 293
 294 # Add the driver target to this language's targets for cleaning
 295 $(eval SCRUB_TARGETS  += $(DRIVER_TARG))
 296 $(DRIVER_TARG): $(DRIVER_DEPS) | $(DRIVER_TARG_DIR)
 297         $($2_C) $($2_FLAGS) $(DRIVER_SRC) -o $$@
 298 # Output a rule for building with debug flags
 299 $(eval DRIVER_DBGTARG := $(DRIVER_TARG_DIR)$(basename $(notdir $(DRIVER_TARG)))-d$($2_OUT))
 300 $(eval SCRUB_TARGETS  += $(DRIVER_DBGTARG))
 301 $(eval MAKE_DIRS += $(DRIVER_TARG_DIR).$($2_DBG)/)
 302 $(DRIVER_DBGTARG): $(DRIVER_DBGDEPS) | $(DRIVER_TARG_DIR)
 303         $($2_C) $($2_FLAGS) $(DRIVER_DBGSRC) -o $$@
 304 # Make a rule to run this driver after building
 305 $(DRIVER_NAME)-run: $(DRIVER_TARG)
 306         $(DRIVER_TARG)
 307 $(DRIVER_NAME)-d: $(DRIVER_DBGTARG)
 308
 309 #/SRC_LANG_DRVRULE###############################################################
 310 endef
 311
 312 #MODULE_ARCRULE##################################################################
 313 # generate rule for turning an entire module's collection of binary objects into
 314 # a single locally-linked (no external -L libs) object (for simplified linking
 315 # modules as static libs).#######################################################
 316 define MODULE_ARCRULE =
 317 $(eval ARCDEPS := $(filter $1/%.$(c_OBJ),$(foreach lang,$(LANGS),$($(lang)_MOD_TRG))))\
 318 $(eval MAKE_TARGETS+= $1.$(c_AROBJ))\
 319
 320 $1.$(c_AROBJ): $(ARCDEPS)
 321         $(c_AR) cr $$@ $$^
 322 $(if $(c_DBG),
 323 $(eval undefine DBGARCDEPS)
 324 $(foreach arcdep,$(ARCDEPS),$(eval DBGARCDEPS += $(dir $(arcdep)).$(c_DBG)/$(notdir $(arcdep))))
 325 $(eval MAKE_TARGETS+= .$(c_DBG)/$1.$(c_AROBJ))\
 326
 327 .$(c_DBG)/$1.$(c_AROBJ): $(DBGARCDEPS) | .$(c_DBG)/
 328         $(c_AR) cr $$@ $$^
 329 )
 330 #/MODULE_ARCRULE#################################################################
 331 endef
 332
 333 # LANG_LIB_PARENT_BUILDRULE######################################################
 334 # define rules for creating unknown libraries in the local build environment for
 335 # either binary or bytecode representation given a library name and, optionally,
 336 # a parent lib that included it for error reporting #############################
 337 define LANG_LIB_PARENT_BUILDRULE =
 338 $(eval CONF_FLAG := --prefix=$(abspath $(LIB_DIR)).trash)
 339 $(eval CONF_FLAG += --includedir=$(abspath $(LIBINC_DIR)))
 340 # Setup installation rule steps for this lib
 341 $(eval
 342 BUILDSTEPS := $(if $(AUTOGEN),$(AUTOGEN) && )
 343 BUILDSTEPS += $(if $(CONFIGURE),$(CONFIGURE) $(CONF_FLAG) --libdir=$(abspath $(LIB_DIR)) && )
 344 $(if $(MKCMD),\
 345 BUILDSTEPS += $(MKCMD),
 346 $(error $2.mk requires a valid MKCMD definition))
 347 $(if $(MKINSTALL),\
 348 INSTALLCMD := $(MKINSTALL),\
 349 $(error $2.mk requires a valid MKINSTALL definition))
 350 CLEANCMD   := $(MKCLEAN)
 351 )
 352 # Construct the download method, or error if there isn't a valid one
 353 $(if $(GITADDR),$(eval LIBDL := git clone $(GITADDR) $2),\
 354 $(if $(HGADDR),$(eval LIBDL  := hg clone $(HGADDR) $2),\
 355 $(if $(CVSADDR),\
 356 $(eval LIBDL := export CVSROOT=$(CVSADDR))\
 357 $(eval LIBDL += && echo '$(CVSPASS)' > ~/.cvspass)\
 358 $(eval LIBDL += && cvs $($2_CVSGET))
 359 $(eval LIBDL += && $(if $(CVSPASS_BAK),echo $(CVSPASS_BAK) > ~/.cvspass,rm ~/.cvspass)),\
 360 $(if $(WEBADDR),$(eval LIBDL := wget -O $(WEBTARG) $(WEBADDR)),\
 361 $(eval $(error No way to download $2 needed by $3 for $1 language ))))))
 362 # '$2' Download Rule
 363 $(LIBDL_DIR)/$2:
 364         mkdir -p $$@
 365         cd $(LIBDL_DIR) && $(LIBDL) $(if $(WEBINIT),&& $(WEBINIT))
 366 # '$2' Make and install rule, and ensure it isn't marked "clean"
 367 $(LIB_DIR)/lib$2.$($1_AROBJ): $(LIBDEPS:%=$(LIB_DIR)/lib%.$($1_AROBJ)) | $(LIBDL_DIR)/$2
 368         @mkdir -p $(LIB_DIR)
 369         cd $(LIBDL_DIR)/$2 && export LD_RUN_PATH=$(LIBLDPATH) && $(BUILDSTEPS)
 370         cd $(LIBDL_DIR)/$2 && $(INSTALLCMD)
 371         @rm -f $(LIBDL_DIR)/$2.clean
 372
 373 # '$2' Rule for building under debug mode
 374 $(if $($1_DBG),\
 375 $(eval LIBDBG_DIR := $(LIB_DIR)/.$($1_DBG))\
 376 $(eval $(if $(findstring $(LIBDBG_DIR),$(MAKE_DIRS)),,MAKE_DIRS += $(LIBDBG_DIR)))\
 377 $(eval LIBDBG_TARG := $(LIBDBG_DIR)/lib$2.$($1_AROBJ))\
 378 $(eval LIBDBG_DEPS := $(LIBDEPS:%=$(LIB_DIR)/.$($1_DBG)/lib%.$($1_AROBJ)))\
 379 $(eval DBGBUILDSTEPS := $(if $(AUTOGEN),$(if $(AUTOGENDBG),$(AUTOGENDBG),$(AUTOGEN)) && ))\
 380 $(eval DBGBUILDSTEPS += $(if $(CONFIGURE),$(if $(CONFIGUREDBG),$(CONFIGUREDBG),$(CONFIGURE)) $(CONF_FLAG) --libdir=$(abspath $(LIB_DIR))/.$($1_DBG)))\
 381 $(eval DBGBUILDSTEPS += $(if $(MKDBGCMD),$(MKDBGCDM),$(MKCMD)))\
 382
 383 # '$2' Make and install rule for debugging
 384 $(LIBDBG_TARG): $(LIBDBG_DEPS) | $(LIBDL_DIR)
 385         @mkdir -p $(LIBDBG_DIR)
 386         cd $(LIBDL_DIR)/$2 && export LD_RUN_PATH=$(LIBLDPATH:$(LIB_DIR)%=$(LIBDBG_DIR)) && $(DBGBUILDSTEPS)
 387         cd $(LIBDL_DIR)/$2 && $(INSTALLCMD)
 388         @rm -f $(LIBDL_DIR)/$2.clean
 389 )
 390
 391 # '$2' Clean rule - drop a marker in the directory so we don't bother cleaning
 392 # things that are clean... by default there is no real way of tracking this in a
 393 # makefile
 394 clean_$2:
 395         $$(if $$(wildcard $(LIBDL_DIR)/$2),$$(if $$(wildcard $(LIBDL_DIR)/$2.clean),,\
 396         cd $(LIBDL_DIR)/$2 && $(CLEANCMD) && touch $(abspath $(LIBDL_DIR))/$2.clean))
 397
 398 #/LANG_LIB_PARENT_BUILDRULE######################################################
 399 endef
 400
 401
 402 #LANG_LIB_INIT###################################################################
 403 # For every library in this language, we need to determine how, and if, to link
 404 # its data.  This could potentially be done recursively as libraries have
 405 # dependencies upon each other.  We call a recursive macro here to expand out
 406 # all the libs for this language, and then flatten the tree by removing
 407 # duplicates with shell commands.  We can't use make's 'sort' function because
 408 # we actually care about the ordering so that interdependent libraries can link
 409 # back up the tree ##############################################################
 410 define LANG_LIB_INIT =
 411 # Initialize per-library data, then import data from an accompanying file that
 412 # can overwrite these vars
 413 $(eval
 414 # Implicit defaults for lib.mk files
 415 AUTOGEN    := ./autogen.sh
 416 AUTOGENDBG := ./autogen.sh --enable-debug
 417 CONFIGURE  := ./configure
 418 MKCMD      := make -k
 419 MKINSTALL  := make -k install
 420 MKCLEAN    := make clean
 421 MKDBGCMD   := make -k
 422 LIBDEPS    :=
 423 LIBLANGS   := c cpp go
 424 LIBLDPATH  := $(if $($($1_C)_LD),$(if $(LD_LIBRARY_PATH),$(LD_LIBRARY_PATH):,/usr/lib:)$(abspath $(LIB_DIR)))
 425 # One of these must be defined in the .mk file imported
 426 $(foreach var, GITADDR WEBADDR HGADDR CVSADDR,\
 427 $(eval undefine $(var)))
 428 # Other, optional, variables to clear
 429 $(foreach var, WEBTARG WEBINIT CVSGET CVSPASS CONFIGUREDBG,
 430 $(eval undefine $(var)))
 431 )
 432 # Include and evaluate such that it may be called and evaluated for immediate
 433 # evaluation of its contents
 434 define EVALINCLUDE =
 435 $(eval include $2.mk)
 436 endef
 437 # If there is a .mk file for this lib, import it.  Otherwise, we'll try to link
 438 # it later, unless there is no linker for the language's compiler.
 439 $(if $(wildcard $2.mk),$(eval $(file <$2.mk)),\
 440 $(if $($($1_C)_LD),\
 441 $(warning No $2.mk for lib$2, attempting to link from the system),\
 442 $(error No $2.mk for lib$2 and '$($1_C)' is not configured for linking)))\
 443
 444 # Add dependencies we found (potentially recursively, ignore repeats until later
 445 # so we can preserve ordering information for interdependency build ordering)
 446 $(if $(LIBDEPS),\
 447 $(eval $1_LIBS += $(LIBDEPS)))
 448 # languages that can link this library (typically any lang that shares the
 449 # object format (ELF by default, but this is compiler-dependent (e.g. emcc uses
 450 # llvm bitcode, which is just an intermediary representation of data that can
 451 # link to anything else statically, or as an archive)))
 452 $(if $(findstring $1,$(LIBLANGS)),,\
 453 $(error $2.mk must specifically set LIBLANGS := $1 if it is compatible with $1))
 454 # Mark this lib as available for all its other compatible languages.  This list
 455 # is assumed to be sorted later, so we will ignore repeats for speed
 456 $(foreach lang,$(LIBLANGS),\
 457 $(if $(findstring $2,$($(lang)_LIBS)),,\
 458 $(eval $(lang)_LIBS += $2)))
 459 # Generate a build rule for this lib, unless it's already built
 460 $(if $(findstring $2,$(BUILTLIBS)),,\
 461 $(eval $(call LANG_LIB_PARENT_BUILDRULE,$1,$2,$3))\
 462 $(eval BUILTLIBS += $2))
 463 # Recurse this function for every libdep encountered
 464 $(foreach libdep,$(LIBDEPS),\
 465 $(call LANG_LIB_INIT,$1,$(libdep),$2))
 466 #/LANG_LIB_INIT#################################################################
 467 endef
 468
 469 # Initialize data for supported lanaguages ######################################
 470 define LANG_INIT =
 471 $(eval
 472 $1_OBJ     := $($($1_C)_OBJ)
 473 $1_OUT     := $($($1_C)_OUT)
 474 $1_AROBJ   := $($($1_C)_AROBJ)
 475 $1_SOURCES := $(subst ./,,$(shell find -name "*.$1"))
 476 $1_DBG     := $($($1_C)_DBG)
 477 $1_AR      := $($($1_C)_AR)
 478 )
 479 # Find save language-specific driver and module sources and targets
 480 $(eval $1_DRV_SRC := $(filter $(DRIVER_DIR)/%,$($1_SOURCES)))
 481 $(eval $1_DRV_TRG := $(patsubst %.$1,$(ROOT_DIR)/%$($1_OUT),$($1_DRV_SRC)))
 482 $(eval $1_MOD_SRC := $(filter-out $(DRIVER_DIR)/%,$($1_SOURCES)))
 483 $(eval $1_MOD_TRG := $(subst .$1,.$($1_OBJ),$($1_MOD_SRC)))
 484 # Add those sources and targets to a language-irreverant var
 485 $(eval
 486 DRV_SRC    += $($1_DRV_SRC)
 487 DRV_TRG    += $($1_DRV_TRG)
 488 MOD_SRC    += $($1_MOD_SRC)
 489 MOD_TRG    += $($1_MOD_TRG)
 490 )\
 491 # First, initialize language-module, module, and language relative data.  Then,
 492 # filter out each source file from the module and generate Dependency Rules and
 493 # Module Object Rules for each of them.
 494 $(foreach module,$(MODULES),
 495 # Evaluate the module sources for this language
 496 $(eval $(module)_$1_SRC := $(filter $(module)/%,$($1_MOD_SRC)))
 497 # Evaluate module targets for this language
 498 $(eval $(module)_$1_TRG := $($(module)_$1_SRC:%.$1=%.$($1_OBJ)))
 499 # Add these language-specific sources and targets to the module's src/targs
 500 $(eval
 501 $(module)_SRC += $($(module)_$1_SRC)
 502 $(module)_TRG += $($(module)_$1_TRG)
 503 )
 504 # For every source file, create a build rule for it for our language
 505 $(foreach src,$(filter $(module)/%,$($1_MOD_SRC)),\
 506 $(eval $(call SRC_LANG_RULE,$(src),$1))\
 507 ))
 508 # For all the listed libraries, initialize the library, which will set up all of
 509 # its local ($1_LIBS, etc) data
 510 $(foreach lib,$($1_LIBS),\
 511 $(eval $(call LANG_LIB_INIT,$1,$(lib),$1)))
 512 # The initializer produces an ordered list of interlinked dependencies in groups
 513 # by depth, so when reading backwards and compressing repeats we are left with a
 514 # reliable build order for library interlinking.  this awk program just looks
 515 # through a list of space separated words backwards failing to print when it
 516 # encounters a repeat
 517 $1_LIBS := $(shell echo "$($1_LIBS)" | $(call AWK_REVERSE_SQUASH))
 518 #/LANG_INIT######################################################################
 519 endef
 520
 521 # The recursive library dependecy traversal constructs a tree ordered by nested
 522 # dependency depth.  when linking, this order is reversed.
 523 # Initialize each language and look for its files
 524 $(eval $(foreach lang,$(LANGS),\
 525 $(eval $(call LANG_INIT,$(lang)))\
 526 $(eval $(lang)_LIBS := $(shell echo $($(lang)_LIBS) | $(call AWK_REVERSE_SQUASH)))\
 527 ))
 528
 529 # Create module object rules for each module
 530 $(foreach module,$(MODULES),\
 531 $(eval $(call MODULE_ARCRULE,$(module)))\
 532 )
 533 $(if $(c_DBG),$(eval MAKE_DIRS += .$(c_DBG)/))
 534
 535 # Create lang-specific rules for producing final (linked) targets
 536 $(foreach lang,$(LANGS),\
 537 $(foreach drvsrc,$($(lang)_DRV_SRC),\
 538 $(eval $(call SRC_LANG_DRVRULE,$(drvsrc),$(lang)))\
 539 ))
 540
 541 # Create driver rules for each driver we found, let users call make specifying
 542 # the basename of the driver file, and just route to the correct linkrule we
 543 # made in the last paragraph
 544 DRV_FNAMES := $(notdir $(DRV_SRC))
 545 .PHONY: all $(basename $(DRV_NAMES))
 546 $(foreach fname,$(DRV_FNAMES),\
 547 $(eval $(basename $(fname)): \
 548 $(filter %/$(basename $(fname))$($(lastword $(subst ., ,$(fname))_OUT)),$(DRV_TRG)))\
 549 )
 550 all: $(basename $(DRV_FNAMES))
 551         @echo Build Complete
 552
 553 # Rule to make any dirs that we're in charge of
 554 $(sort $(MAKE_DIRS)):
 555         @mkdir -p $@
 556
 557 # Cleaning rules.
 558 # Clean destroys all object files and internal module archives.
 559 CLEAN_TARGETS := $(sort $(foreach mtarg,$(MAKE_TARGETS),$(if $(wildcard $(mtarg)),$(mtarg))))
 560 clean: $(BUILTLIBS:%=clean_%)
 561         $(if $(CLEAN_TARGETS),rm $(CLEAN_TARGETS))
 562
 563 # Scrub destroys all distributable binaries
 564 SCRUB_TARGETS := $(sort $(foreach starg,$(SCRUB_TARGETS),$(if $(wildcard $(starg)),$(starg))))
 565 scrub: clean
 566         $(if $(SCRUB_TARGETS),rm $(SCRUB_TARGETS))
 567
 568 # Purge destroys all distributables created by a distributable binary
 569 # (e.g. assets)
 570
 571 # Uninstall destroys all objects and directories that cannot be recreated by
 572 # this make file
 573 uninstall: scrub
 574         rm -Rf $(MAKE_DIRS)