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