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