1 #
   2 # Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
   3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4 #
   5 # This code is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License version 2 only, as
   7 # published by the Free Software Foundation.  Oracle designates this
   8 # particular file as subject to the "Classpath" exception as provided
   9 # by Oracle in the LICENSE file that accompanied this code.
  10 #
  11 # This code is distributed in the hope that it will be useful, but WITHOUT
  12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 # version 2 for more details (a copy is included in the LICENSE file that
  15 # accompanied this code).
  16 #
  17 # You should have received a copy of the GNU General Public License version
  18 # 2 along with this work; if not, write to the Free Software Foundation,
  19 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20 #
  21 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22 # or visit www.oracle.com if you need additional information or have any
  23 # questions.
  24 #
  25 
  26 # When you read this source. Remember that $(sort ...) has the side effect
  27 # of removing duplicates. It is actually this side effect that is
  28 # desired whenever sort is used below!
  29 
  30 ifndef _JAVA_COMPILATION_GMK
  31 _JAVA_COMPILATION_GMK := 1
  32 
  33 ifeq (,$(_MAKEBASE_GMK))
  34   $(error You must include MakeBase.gmk prior to including JavaCompilation.gmk)
  35 endif
  36 
  37 # Java compilation needs SetupJarArchive and/or SetupZipArchive, if we're
  38 # generating a jar file or a source zip.
  39 include JarArchive.gmk
  40 include ZipArchive.gmk
  41 
  42 # Setup make rules for defining a Java compiler, which is needed to compile
  43 # Java code. This rule generates no output.
  44 #
  45 # Parameter 1 is the name of the compiler definition. This name needs to be
  46 # passed to SetupJavaCompilation. This name is used as variable prefix.
  47 #
  48 # Remaining parameters are named arguments. These include:
  49 #   JVM:=The jvm used to run the javac/javah command
  50 #   JAVAC:=The javac jar and bootstrap classpath changes, or just bin/javac if JVM is left out
  51 #   FLAGS:=Flags to be supplied to javac
  52 #   SERVER_DIR:=Use a javac server (-XDserver) and store the server related files here
  53 #   SERVER_JVM:=Use this JVM for the server. Defaults to the JVM above.
  54 #   DISABLE_SJAVAC:=Set to true if this setup does not support sjavac
  55 SetupJavaCompiler = $(NamedParamsMacroTemplate)
  56 define SetupJavaCompilerBody
  57   # The port file contains the tcp/ip on which the server listens
  58   # and the cookie necessary to talk to the server.
  59   $1_SJAVAC_PORTFILE:=$$($1_SERVER_DIR)/server.port
  60   # You can use a different JVM to run the background javac server.
  61   ifeq ($$($1_SERVER_JVM),)
  62     # It defaults to the same JVM that is used to start the javac command.
  63     $1_SERVER_JVM:=$$($1_JVM)
  64   endif
  65 endef
  66 
  67 define add_file_to_copy
  68   # param 1 = BUILD_MYPACKAGE
  69   # parma 2 = The source file to copy.
  70   $2_TARGET:=$2
  71   # Remove the source prefix.
  72   $$(foreach i,$$($1_SRC),$$(eval $$(call remove_string,$$i,$2_TARGET)))
  73   # To allow for automatic overrides, do not create a rule for a target file that
  74   # already has one
  75   ifneq ($$($1_COPY_$$($2_TARGET)), 1)
  76     $1_COPY_$$($2_TARGET) := 1
  77     # Now we can setup the dependency that will trigger the copying.
  78     $$($1_BIN)$$($2_TARGET) : $2
  79         $(MKDIR) -p $$(@D)
  80         $(CP) $$< $$@
  81         $(CHMOD) -f ug+w $$@
  82 
  83     # And do not forget this target
  84     $1_ALL_COPY_TARGETS += $$($1_BIN)$$($2_TARGET)
  85   endif
  86 endef
  87 
  88 # This macro is used only for properties files that are to be
  89 # copied over to the classes directory in cleaned form:
  90 # Previously this was inconsistently done in different repositories.
  91 # This is the new clean standard. Though it is to be superseded by
  92 # a standard annotation processor from with sjavac.
  93 #
  94 # An empty echo ensures that the input to sed always ends with a newline.
  95 # Certain implementations (e.g. Solaris) will skip the last line without
  96 # it.
  97 #
  98 # The sed expression does this:
  99 # 1. Add a backslash before any :, = or ! that do not have a backslash already.
 100 # 2. Apply the file unicode2x.sed which does a whole bunch of \u00XX to \xXX
 101 #    conversions.
 102 # 3. Delete all lines starting with #.
 103 # 4. Delete empty lines.
 104 # 5. Append lines ending with \ with the next line.
 105 # 6. Remove leading and trailing white space. Note that tabs must be explicit
 106 #    as sed on macosx does not understand '\t'.
 107 # 7. Replace the first \= with just =.
 108 # 8. Finally it's all sorted to create a stable output.
 109 #
 110 # It is assumed that = is the character used for separating names and values.
 111 define add_file_to_clean
 112   # param 1 = BUILD_MYPACKAGE
 113   # parma 2 = The source file to copy and clean.
 114   $2_TARGET:=$2
 115   # Remove the source prefix.
 116   $$(foreach i,$$($1_SRC),$$(eval $$(call remove_string,$$i,$2_TARGET)))
 117   # Now we can setup the depency that will trigger the copying.
 118   # To allow for automatic overrides, do not create a rule for a target file that
 119   # already has one
 120   ifneq ($$($1_CLEAN_$$($2_TARGET)), 1)
 121     $1_CLEAN_$$($2_TARGET) := 1
 122     $$($1_BIN)$$($1_MODULE_SUBDIR)$$($2_TARGET) : $2
 123         $(MKDIR) -p $$(@D)
 124         export LC_ALL=C ; ( $(CAT) $$< && $(ECHO) "" ) \
 125             | $(SED) -e 's/\([^\\]\):/\1\\:/g' -e 's/\([^\\]\)=/\1\\=/g' \
 126                 -e 's/\([^\\]\)!/\1\\!/g' -e 's/^[      ]*#.*/#/g' \
 127             | $(SED) -f "$(SRC_ROOT)/make/common/support/unicode2x.sed" \
 128             | $(SED) -e '/^#/d' -e '/^$$$$/d' \
 129                 -e :a -e '/\\$$$$/N; s/\\\n//; ta' \
 130                 -e 's/^[        ]*//;s/[        ]*$$$$//' \
 131                 -e 's/\\=/=/' \
 132             | $(SORT) > $$@
 133         $(CHMOD) -f ug+w $$@
 134 
 135     # And do not forget this target
 136     $1_ALL_COPY_CLEAN_TARGETS += $$($1_BIN)$$($2_TARGET)
 137   endif
 138 endef
 139 
 140 define remove_string
 141   $2 := $$(subst $1,,$$($2))
 142 endef
 143 
 144 # Setup make rules for compiling Java source code to class files and/or a
 145 # resulting jar file.
 146 #
 147 # Parameter 1 is the name of the rule. This name is used as variable prefix,
 148 # and the targets generated are listed in a variable by that name.
 149 #
 150 # Remaining parameters are named arguments. These include:
 151 #   SETUP:=must point to a previously setup java compiler, for example: SETUP:=BOOTJAVAC
 152 #   JVM:=path to ..bin/java
 153 #   ADD_JAVAC_FLAGS:=javac flags to append to the default ones.
 154 #   SRC:=one or more directories to search for sources. The order of the source roots
 155 #        is significant. The first found file of a certain name has priority.
 156 #   BIN:=store classes here
 157 #   CLASSPATH:=a list of additional entries to set as classpath to javac
 158 #   INCLUDES:=myapp.foo means will only compile java files in myapp.foo or any of its sub-packages.
 159 #   EXCLUDES:=myapp.foo means will do not compile java files in myapp.foo or any of its sub-packages.
 160 #   COPY:=.prp means copy all prp files to the corresponding package in BIN.
 161 #   COPY_FILES:=myapp/foo/setting.txt means copy this file over to the package myapp/foo
 162 #   CLEAN:=.properties means copy and clean all properties file to the corresponding package in BIN.
 163 #   CLEAN_FILES:=myapp/foo/setting.txt means clean this file over to the package myapp/foo
 164 #   SRCZIP:=Create a src.zip based on the found sources and copied files.
 165 #   INCLUDE_FILES:="com/sun/SolarisFoobar.java" means only compile this file!
 166 #   EXCLUDE_FILES:="com/sun/SolarisFoobar.java" means do not compile this particular file!
 167 #       "SolarisFoobar.java" means do not compile SolarisFoobar, wherever it is found.
 168 #   HEADERS:=path to directory where all generated c-headers are written.
 169 #   DEPENDS:=Extra dependecy
 170 #   DISABLE_SJAVAC:=Explicitly disable the use of sjavac for this compilation unit.
 171 #   KEEP_DUPS:=Do not remove duplicate file names from different source roots.
 172 SetupJavaCompilation = $(NamedParamsMacroTemplate)
 173 define SetupJavaCompilationBody
 174 
 175   # Verify arguments
 176   ifeq ($$($1_BIN),)
 177     $$(error Must specify BIN (in $1))
 178   endif
 179 
 180   # Extract the info from the java compiler setup.
 181   $1_JVM := $$($$($1_SETUP)_JVM)
 182   $1_JAVAC := $$($$($1_SETUP)_JAVAC)
 183   $1_FLAGS := $$($$($1_SETUP)_FLAGS) $(JAVAC_FLAGS) $$($1_ADD_JAVAC_FLAGS)
 184   ifneq ($$($1_CLASSPATH), )
 185     $1_FLAGS += -cp $$(call PathList, $$($1_CLASSPATH))
 186   endif
 187   ifeq ($$($1_JAVAC),)
 188     $$(error The Java compilation $1 refers to a non-existant java compiler setup $$($1_SETUP))
 189   endif
 190   $1_SJAVAC_PORTFILE := $$($$($1_SETUP)_SJAVAC_PORTFILE)
 191   $1_SERVER_JVM := $$($$($1_SETUP)_SERVER_JVM)
 192   $1_DISABLE_SJAVAC := $$($$($1_SETUP)_DISABLE_SJAVAC)
 193 
 194   # Make sure the dirs exist.
 195   $$(foreach d,$$($1_SRC), $$(if $$(wildcard $$d),,$$(error SRC specified to SetupJavaCompilation $1 contains missing directory >$$d<)))
 196   $$(call MakeDir,$$($1_BIN))
 197   # Add all source roots to the find cache since we are likely going to run find
 198   # on these more than once. The cache will only be updated if necessary.
 199   $$(eval $$(call FillCacheFind,$$($1_SRC)))
 200   # Find all files in the source trees. Preserve order of source roots so that
 201   # the first version in case of multiple instances of the same file is selected.
 202   # CacheFind does not preserve order so need to call it for each root.
 203   $1_ALL_SRCS += $$(foreach s, $$($1_SRC), $$(call CacheFind, $$(s)))
 204   # Extract the java files.
 205   $1_SRCS := $$(filter %.java, $$($1_ALL_SRCS))
 206 
 207   # Translate include/exclude into patterns
 208   ifneq ($$($1_EXCLUDE_FILES), )
 209     $1_EXCLUDE_PATTERN := $$(addprefix %, $$($1_EXCLUDE_FILES))
 210   endif
 211   ifneq ($$($1_INCLUDE_FILES), )
 212     $1_INCLUDE_PATTERN := $$(foreach i, $$($1_SRC), $$(addprefix $$i/, $$($1_INCLUDE_FILES)))
 213   endif
 214   ifneq ($$($1_EXCLUDES), )
 215     $1_EXCLUDE_PATTERN += $$(foreach i, $$($1_SRC), $$(addprefix $$i/, $$(addsuffix /%, $$($1_EXCLUDES))))
 216   endif
 217   ifneq ($$($1_INCLUDES), )
 218     $1_INCLUDE_PATTERN += $$(foreach i, $$($1_SRC), $$(addprefix $$i/, $$(addsuffix /%, $$($1_INCLUDES))))
 219   endif
 220 
 221   # Apply include/exclude patterns to java sources
 222   ifneq ($$($1_EXCLUDE_PATTERN), )
 223     $1_SRCS := $$(filter-out $$($1_EXCLUDE_PATTERN), $$($1_SRCS))
 224   endif
 225   ifneq ($$($1_INCLUDE_PATTERN), )
 226     $1_SRCS := $$(filter $$($1_INCLUDE_PATTERN), $$($1_SRCS))
 227   endif
 228 
 229   ifneq ($$($1_KEEP_DUPS), true)
 230     # Remove duplicate source files by keeping the first found of each duplicate.
 231     # This allows for automatic overrides with custom or platform specific versions
 232     # source files.
 233     #
 234     # For the smart javac wrapper case, add each removed file to an extra exclude
 235     # file list to prevent sjavac from finding duplicate sources.
 236     $1_SRCS := $$(strip $$(foreach s, $$($1_SRCS), \
 237         $$(eval relative_src := $$(call remove-prefixes, $$($1_SRC), $$(s))) \
 238         $$(if $$($1_$$(relative_src)), \
 239           $$(eval $1_SJAVAC_EXCLUDE_FILES += $$(s)), \
 240           $$(eval $1_$$(relative_src) := 1) $$(s))))
 241   endif
 242 
 243   ifeq ($$(strip $$($1_SRCS)), )
 244     $$(error No source files found for $1)
 245   endif
 246 
 247   $1_SAFE_NAME := $$(strip $$(subst /,_, $1))
 248 
 249   # All files below META-INF are always copied.
 250   $1_ALL_COPIES := $$(filter $$(addsuffix /META-INF%,$$($1_SRC)),$$($1_ALL_SRCS))
 251   # Find all files to be copied from source to bin.
 252   ifneq (,$$($1_COPY)$$($1_COPY_FILES))
 253     # Search for all files to be copied.
 254     $1_ALL_COPIES += $$(filter $$(addprefix %,$$($1_COPY)),$$($1_ALL_SRCS))
 255     # Copy these explicitly
 256     $1_ALL_COPIES += $$($1_COPY_FILES)
 257   endif
 258   # Copy must also respect filters.
 259   ifneq (,$$($1_INCLUDE_PATTERN))
 260     $1_ALL_COPIES := $$(filter $$($1_INCLUDE_PATTERN),$$($1_ALL_COPIES))
 261   endif
 262   ifneq (,$$($1_EXCLUDE_PATTERN))
 263     $1_ALL_COPIES := $$(filter-out $$($1_EXCLUDE_PATTERN),$$($1_ALL_COPIES))
 264   endif
 265   ifneq (,$$($1_ALL_COPIES))
 266     # Yep, there are files to be copied!
 267     $1_ALL_COPY_TARGETS:=
 268         $$(foreach i,$$($1_ALL_COPIES),$$(eval $$(call add_file_to_copy,$1,$$i)))
 269     # Now we can depend on $$($1_ALL_COPY_TARGETS) to copy all files!
 270   endif
 271 
 272   # Find all property files to be copied and cleaned from source to bin.
 273   ifneq (,$$($1_CLEAN)$$($1_CLEAN_FILES))
 274     # Search for all files to be copied.
 275     $1_ALL_CLEANS := $$(filter $$(addprefix %,$$($1_CLEAN)),$$($1_ALL_SRCS))
 276     # Clean these explicitly
 277     $1_ALL_CLEANS += $$($1_CLEAN_FILES)
 278     # Copy and clean must also respect filters.
 279     ifneq (,$$($1_INCLUDE_PATTERN))
 280       $1_ALL_CLEANS := $$(filter $$($1_INCLUDE_PATTERN),$$($1_ALL_CLEANS))
 281     endif
 282     ifneq (,$$($1_EXCLUDE_PATTERN))
 283       $1_ALL_CLEANS := $$(filter-out $$($1_EXCLUDE_PATTERN),$$($1_ALL_CLEANS))
 284     endif
 285     ifneq (,$$($1_ALL_CLEANS))
 286       # Yep, there are files to be copied and cleaned!
 287       $1_ALL_COPY_CLEAN_TARGETS:=
 288           $$(foreach i,$$($1_ALL_CLEANS),$$(eval $$(call add_file_to_clean,$1,$$i)))
 289       # Now we can depend on $$($1_ALL_COPY_CLEAN_TARGETS) to copy all files!
 290     endif
 291   endif
 292 
 293   # Create a sed expression to remove the source roots and to replace / with .
 294   # and remove .java at the end.
 295   $1_REWRITE_INTO_CLASSES:=$$(foreach i,$$($1_SRC),-e 's|$$i/||g') -e 's|/|.|g' -e 's|.java$$$$||g'
 296 
 297   # Create SJAVAC variable from JAVAC variable. Expects $1_JAVAC to be
 298   # "bootclasspathprepend -cp .../javac.jar com.sun.tools.javac.Main"
 299   # and javac is simply replaced with sjavac.
 300   $1_SJAVAC:=$$(subst com.sun.tools.javac.Main,com.sun.tools.sjavac.Main,$$($1_JAVAC))
 301 
 302   # Set the $1_REMOTE to spawn a background javac server.
 303   $1_REMOTE:=--server:portfile=$$($1_SJAVAC_PORTFILE),id=$1,sjavac=$$(subst \
 304       $$(SPACE),%20,$$(subst $$(COMMA),%2C,$$(strip $$($1_SERVER_JVM) $$($1_SJAVAC))))
 305 
 306   $1_COMPILE_TARGET := $$($1_BIN)/_the.$1_batch
 307 
 308   ifeq ($$($1_DISABLE_SJAVAC)x$$(ENABLE_SJAVAC),xyes)
 309     # Using sjavac to compile.
 310 
 311     # Create the sjavac wrapper command line. Sjavac doesn't handle patterns that
 312     # match the absolute path, only the part inside each src dir. Instead -i and
 313     # -x flags apply only to the next -src arg on the command line.
 314     $1_EXCLUDE_FILES_ABS := $$(filter /%, $$($1_EXCLUDE_FILES)) $$($1_SJAVAC_EXCLUDE_FILES)
 315     $1_EXCLUDE_FILES_REL := $$(filter-out /%, $$($1_EXCLUDE_FILES))
 316     $1_SJAVAC_ARGS_STRING := $$(foreach s, $$(patsubst %/, %, $$($1_SRC)), \
 317         $$(addprefix -x ,$$(addsuffix /**,$$($1_EXCLUDES))) \
 318         $$(addprefix -i ,$$(addsuffix /**,$$($1_INCLUDES))) \
 319         $$(addprefix -x **,$$(strip $$($1_EXCLUDE_FILES_REL))) \
 320         $$(addprefix -i **,$$(strip $$($1_INCLUDE_FILES))) \
 321         $$(addprefix -x , $$(strip $$(patsubst $$(s)/%, %, $$(filter $$(s)/%, $$($1_EXCLUDE_FILES_ABS))))) \
 322         -src $$(s))
 323 
 324     ifneq ($$(word 20, $$($1_SJAVAC_ARGS_STRING)), )
 325       $1_SJAVAC_ARGS_FILE := $$($1_BIN)/_the.$1_args
 326       $1_SJAVAC_ARGS := @$$($1_SJAVAC_ARGS_FILE)
 327     else
 328       $1_SJAVAC_ARGS := $$($1_SJAVAC_ARGS_STRING)
 329     endif
 330 
 331 
 332     ifneq (,$$($1_HEADERS))
 333       $1_HEADERS_ARG := -h $$($1_HEADERS)
 334     endif
 335 
 336     $1_VARDEPS := $$($1_JVM) $$($1_SJAVAC) $$($1_SJAVAC_ARGS_STRING) $$($1_FLAGS) \
 337         $$($1_HEADERS_ARG) $$($1_BIN) $$($1_EXCLUDES) $$($1_INCLUDES) \
 338         $$($1_EXCLUDE_FILES) $$($1_INCLUDE_FILES)
 339     $1_VARDEPS_FILE := $$(call DependOnVariable, $1_VARDEPS, $$($1_BIN)/_the.$1.vardeps)
 340 
 341     $$($1_COMPILE_TARGET): $$($1_SRCS) $$($1_DEPENDS) $$($1_VARDEPS_FILE)
 342         $(MKDIR) -p $$(@D) $$(dir $$($1_SJAVAC_PORTFILE))
 343         $$(eval $$(call ListPathsSafely,$1_SRCS, $$@.tmp))
 344         ifneq ($$($1_SJAVAC_ARGS_FILE), )
 345           $$(eval $$(call ListPathsSafely,$1_SJAVAC_ARGS_STRING, $$($1_SJAVAC_ARGS_FILE)))
 346         endif
 347         $(ECHO) Compiling $1
 348         $(call LogFailures, $$($1_BIN)/_the.$$($1_SAFE_NAME)_batch, $$($1_SAFE_NAME), \
 349             $$($1_JVM) $$($1_SJAVAC) \
 350                 $$($1_REMOTE) \
 351                 -j 1 \
 352                 --permit-unidentified-artifacts \
 353                 --permit-sources-without-package \
 354                 --compare-found-sources $$@.tmp \
 355                 --log=$(LOG_LEVEL) \
 356                 --state-dir=$$($1_BIN) \
 357                 $$($1_SJAVAC_ARGS) \
 358                 $$($1_FLAGS) \
 359                 $$($1_HEADERS_ARG) \
 360                 -d $$($1_BIN)) && \
 361         $(MV) $$@.tmp $$@
 362         # Create a pubapi file that only changes when the pubapi changes. Dependent
 363         # compilations can use this file to only get recompiled when pubapi has changed.
 364         # Grep returns 1 if no matching lines are found. Do not fail for this.
 365         $(GREP) -e "^I" $$($1_BIN)/javac_state > $$($1_BIN)/_the.$1_pubapi.tmp \
 366             || test "$$$$?" = "1"
 367         if [ ! -f $$($1_BIN)/_the.$1_pubapi ] \
 368             || [ "`$(DIFF) $$($1_BIN)/_the.$1_pubapi $$($1_BIN)/_the.$1_pubapi.tmp`" != "" ]; then \
 369           $(MV) $$($1_BIN)/_the.$1_pubapi.tmp $$($1_BIN)/_the.$1_pubapi; \
 370         fi
 371 
 372   else
 373     # Using plain javac to batch compile everything.
 374 
 375     # When building in batch, put headers in a temp dir to filter out those that actually
 376     # changed before copying them to the real header dir.
 377     ifneq (,$$($1_HEADERS))
 378       $1_HEADERS_ARG := -h $$($1_HEADERS).$1.tmp
 379 
 380       $$($1_HEADERS)/_the.$1_headers: $$($1_COMPILE_TARGET)
 381                 $(MKDIR) -p $$(@D)
 382                 if [ -d "$$($1_HEADERS).$1.tmp" ]; then \
 383                   for f in `ls $$($1_HEADERS).$1.tmp`; do \
 384                     if [ ! -f "$$($1_HEADERS)/$$$$f" ] \
 385                         || [ "`$(DIFF) $$($1_HEADERS)/$$$$f $$($1_HEADERS).$1.tmp/$$$$f`" != "" ]; then \
 386                     $(CP) -f $$($1_HEADERS).$1.tmp/$$$$f $$($1_HEADERS)/$$$$f; \
 387                   fi; \
 388                   done; \
 389                 fi
 390                 $(RM) -r $$($1_HEADERS).$1.tmp
 391                 $(TOUCH) $$@
 392 
 393       $1_HEADER_TARGETS := $$($1_HEADERS)/_the.$1_headers
 394     endif
 395 
 396     $1_VARDEPS := $$($1_JVM) $$($1_JAVAC) $$($1_FLAGS) $$($1_BIN) \
 397         $$($1_HEADERS_ARG) $$($1_EXCLUDES) $$($1_INCLUDES) \
 398         $$($1_EXCLUDE_FILES) $$($1_INCLUDE_FILES)
 399     $1_VARDEPS_FILE := $$(call DependOnVariable, $1_VARDEPS, $$($1_BIN)/_the.$1.vardeps)
 400 
 401     ifeq ($$($1_DISABLE_SJAVAC)x$(ENABLE_JAVAC_SERVER), xyes)
 402       $1_JAVAC_CMD := $$($1_SJAVAC) $$($1_REMOTE)
 403     else
 404       $1_JAVAC_CMD := $$($1_JAVAC)
 405     endif
 406 
 407     # When not using sjavac, pass along all sources to javac using an @file.
 408     $$($1_COMPILE_TARGET): $$($1_SRCS) $$($1_DEPENDS) $$($1_VARDEPS_FILE)
 409         $(MKDIR) -p $$(@D)
 410         $$(eval $$(call ListPathsSafely,$1_SRCS, $$@.tmp))
 411         $(ECHO) Compiling `$(WC) $$@.tmp | $(TR) -s ' ' | $(CUT) -f 2 -d ' '` files for $1
 412         $(call LogFailures, $$($1_BIN)/_the.$$($1_SAFE_NAME)_batch, $$($1_SAFE_NAME), \
 413             $$($1_JVM) $$($1_JAVAC_CMD) $$($1_FLAGS) \
 414                 -implicit:none \
 415                 -d $$($1_BIN) $$($1_HEADERS_ARG) @$$@.tmp) && \
 416         $(MV) $$@.tmp $$@
 417   endif
 418 
 419   # Add all targets to main variable
 420   $1 := $$($1_ALL_COPY_TARGETS) $$($1_ALL_COPY_CLEAN_TARGETS) $$($1_COMPILE_TARGET) \
 421       $$($1_HEADER_TARGETS)
 422 
 423   # Check if a jar file was specified, then setup the rules for the jar.
 424   ifneq (,$$($1_JAR))
 425     # If no suffixes was explicitly set for this jar file.
 426     # Use class and the cleaned/copied properties file suffixes as the default
 427     # for the types of files to be put into the jar.
 428     ifeq (,$$($1_SUFFIXES))
 429       $1_SUFFIXES:=.class $$($1_CLEAN) $$($1_COPY)
 430     endif
 431 
 432     $$(eval $$(call SetupJarArchive, ARCHIVE_$1, \
 433         DEPENDENCIES:=$$($1), \
 434         SRCS:=$$($1_BIN), \
 435         SUFFIXES:=$$($1_SUFFIXES), \
 436         EXCLUDE:=$$($1_EXCLUDES), \
 437         INCLUDES:=$$($1_INCLUDES), \
 438         EXTRA_FILES:=$$($1_ALL_COPY_TARGETS) $$($1_ALL_COPY_CLEAN_TARGETS), \
 439         JAR:=$$($1_JAR), \
 440         JARMAIN:=$$($1_JARMAIN), \
 441         MANIFEST:=$$($1_MANIFEST), \
 442         EXTRA_MANIFEST_ATTR:=$$($1_EXTRA_MANIFEST_ATTR), \
 443         JARINDEX:=$$($1_JARINDEX), \
 444         HEADERS:=$$($1_HEADERS), \
 445         SETUP:=$$($1_SETUP), \
 446     ))
 447 
 448     # Add jar to target list
 449     $1 += $$($1_JAR)
 450   endif
 451 
 452   # Check if a srczip was specified, then setup the rules for the srczip.
 453   ifneq (,$$($1_SRCZIP))
 454     $$(eval $$(call SetupZipArchive, ZIP_ARCHIVE_$1, \
 455         SRC:=$$($1_SRC), \
 456         ZIP:=$$($1_SRCZIP), \
 457         INCLUDES:=$$($1_INCLUDES), \
 458         EXCLUDES:=$$($1_EXCLUDES), \
 459         EXCLUDE_FILES:=$$($1_EXCLUDE_FILES)))
 460 
 461     # Add zip to target list
 462     $1 += $$($1_SRCZIP)
 463   endif
 464 endef
 465 
 466 # Use this macro to find the correct target to depend on when the original
 467 # SetupJavaCompilation is declared in a different makefile, to avoid having
 468 # to declare and evaluate it again.
 469 # param 1 is for example BUILD_MYPACKAGE
 470 # param 2 is the output directory (BIN)
 471 define SetupJavaCompilationCompileTarget
 472   $(if $(findstring yes, $(ENABLE_SJAVAC)), $(strip $2)/_the.$(strip $1)_pubapi, \
 473       $(strip $2)/_the.$(strip $1)_batch)
 474 endef
 475 
 476 endif # _JAVA_COMPILATION_GMK