xref: /openjdk10/make/common/SetupJavaCompilers.gmk

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ifndef _SETUP_GMK
_SETUP_GMK := 1

include JavaCompilation.gmk

DISABLE_WARNINGS := -Xlint:all,-deprecation,-unchecked,-rawtypes,-cast,-serial,-dep-ann,-static,-fallthrough,-try,-varargs,-empty,-finally

# To build with all warnings enabled, do the following:
# make JAVAC_WARNINGS="-Xlint:all -Xmaxwarns 10000"
JAVAC_WARNINGS := -Xlint:all,-deprecation -Werror

# The BOOT_JAVAC setup uses the boot jdk compiler to compile the tools
# and the interim javac, to be run by the boot jdk.
$(eval $(call SetupJavaCompiler,BOOT_JAVAC, \
    JAVAC := $(JAVAC), \
    FLAGS := -XDignore.symbol.file=true -g -Xlint:all$(COMMA)-deprecation -Werror))

# Any java code executed during a JDK build to build other parts of the JDK must be 
# executed by the bootstrap JDK (probably with -Xbootclasspath/p: ) and for this 
# purpose must be built with -target PREVIOUS for bootstrapping purposes, which 
# requires restricting to language level and api of previous JDK.
#
# The generate old bytecode javac setup uses the new compiler to compile for the
# boot jdk to generate tools that need to be run with the boot jdk.
# Thus we force the target bytecode to the previous JDK version.
$(eval $(call SetupJavaCompiler,GENERATE_OLDBYTECODE, \
    JVM := $(JAVA_SMALL), \
    JAVAC := $(NEW_JAVAC), \
    FLAGS := $(BOOT_JDK_SOURCETARGET) -bootclasspath $(BOOT_RTJAR) $(DISABLE_WARNINGS), \
    SERVER_DIR := $(SJAVAC_SERVER_DIR), \
    SERVER_JVM := $(SJAVAC_SERVER_JAVA)))

# The generate new bytecode javac setup uses the new compiler to compile for the
# new jdk. This new bytecode might only be possible to run using the new jvm.
$(eval $(call SetupJavaCompiler,GENERATE_JDKBYTECODE, \
    JVM := $(JAVA), \
    JAVAC := $(NEW_JAVAC), \
    FLAGS := -source 9 -target 9 \
        -encoding ascii -XDignore.symbol.file=true $(JAVAC_WARNINGS) \
        $(GENERATE_JDKBYTECODE_EXTRA_FLAGS), \
    SERVER_DIR := $(SJAVAC_SERVER_DIR), \
    SERVER_JVM := $(SJAVAC_SERVER_JAVA)))

# The generate new bytecode javac setup uses the new compiler to compile for the
# new jdk. This new bytecode might only be possible to run using the new jvm.
$(eval $(call SetupJavaCompiler,GENERATE_JDKBYTECODE_NOWARNINGS, \
    JVM := $(JAVA), \
    JAVAC := $(NEW_JAVAC), \
    FLAGS := -source 9 -target 9 \
        -encoding ascii -XDignore.symbol.file=true $(DISABLE_WARNINGS) \
        $(GENERATE_JDKBYTECODE_EXTRA_FLAGS), \
    SERVER_DIR := $(SJAVAC_SERVER_DIR), \
    SERVER_JVM := $(SJAVAC_SERVER_JAVA)))

JDK_BOOTCLASSPATH := $(subst $(SPACE),$(PATH_SEP),\
    $(filter-out $(JDK_OUTPUTDIR)/modules/_%, $(wildcard $(JDK_OUTPUTDIR)/modules/*)))

# After the jdk is built, we want to build demos using only the recently
# generated jdk classes and nothing else, no jdk source, etc etc.
# I.e. the rt.jar, but since rt.jar has not yet been generated
# (it will be in "make images") therefore we use classes instead.
$(eval $(call SetupJavaCompiler,GENERATE_USINGJDKBYTECODE, \
    JVM := $(JAVA_SMALL), \
    JAVAC := $(NEW_JAVAC), \
    FLAGS := -bootclasspath "$(JDK_BOOTCLASSPATH)" $(DISABLE_WARNINGS), \
    SERVER_DIR := $(SJAVAC_SERVER_DIR), \
    SERVER_JVM := $(SJAVAC_SERVER_JAVA)))

endif # _SETUP_GMK