8320767: Use := wherever possible in spec.gmk.in

Reviewed-by: erikj

make/autoconf/spec.gmk.in

@@ -193,9 +193,9 @@ JDK_RC_PLATFORM_NAME := @JDK_RC_PLATFORM_NAME@
 JDK_RC_NAME := @JDK_RC_NAME@
 COMPANY_NAME := @COMPANY_NAME@
 HOTSPOT_VM_DISTRO := @HOTSPOT_VM_DISTRO@
-MACOSX_BUNDLE_NAME_BASE = @MACOSX_BUNDLE_NAME_BASE@
-MACOSX_BUNDLE_ID_BASE = @MACOSX_BUNDLE_ID_BASE@
-MACOSX_BUNDLE_BUILD_VERSION = @MACOSX_BUNDLE_BUILD_VERSION@
+MACOSX_BUNDLE_NAME_BASE := @MACOSX_BUNDLE_NAME_BASE@
+MACOSX_BUNDLE_ID_BASE := @MACOSX_BUNDLE_ID_BASE@
+MACOSX_BUNDLE_BUILD_VERSION := @MACOSX_BUNDLE_BUILD_VERSION@
 USERNAME := @USERNAME@
 VENDOR_URL := @VENDOR_URL@
 VENDOR_URL_BUG := @VENDOR_URL_BUG@
@@ -439,18 +439,18 @@ JMH_VERSION := @JMH_VERSION@
 GTEST_FRAMEWORK_SRC := @GTEST_FRAMEWORK_SRC@
 
 # Source file for cacerts
-CACERTS_FILE = @CACERTS_FILE@
+CACERTS_FILE := @CACERTS_FILE@
 # Source folder for user provided cacerts PEM files
-CACERTS_SRC = @CACERTS_SRC@
+CACERTS_SRC := @CACERTS_SRC@
 
 # Enable unlimited crypto policy
-UNLIMITED_CRYPTO = @UNLIMITED_CRYPTO@
+UNLIMITED_CRYPTO := @UNLIMITED_CRYPTO@
 
-GCOV_ENABLED = @GCOV_ENABLED@
-JCOV_ENABLED = @JCOV_ENABLED@
-JCOV_HOME = @JCOV_HOME@
-JCOV_INPUT_JDK = @JCOV_INPUT_JDK@
-JCOV_FILTERS = @JCOV_FILTERS@
+GCOV_ENABLED := @GCOV_ENABLED@
+JCOV_ENABLED := @JCOV_ENABLED@
+JCOV_HOME := @JCOV_HOME@
+JCOV_INPUT_JDK := @JCOV_INPUT_JDK@
+JCOV_FILTERS := @JCOV_FILTERS@
 
 # AddressSanitizer
 ASAN_ENABLED := @ASAN_ENABLED@
@@ -468,13 +468,13 @@ X_CFLAGS := @X_CFLAGS@
 X_LIBS := @X_LIBS@
 
 # The lowest required version of macosx
-MACOSX_VERSION_MIN = @MACOSX_VERSION_MIN@
+MACOSX_VERSION_MIN := @MACOSX_VERSION_MIN@
 # The highest allowed version of macosx
-MACOSX_VERSION_MAX = @MACOSX_VERSION_MAX@
+MACOSX_VERSION_MAX := @MACOSX_VERSION_MAX@
 
 # The macosx code signing configuration
 MACOSX_CODESIGN_MODE := @MACOSX_CODESIGN_MODE@
-MACOSX_CODESIGN_IDENTITY = @MACOSX_CODESIGN_IDENTITY@
+MACOSX_CODESIGN_IDENTITY := @MACOSX_CODESIGN_IDENTITY@
 
 # Toolchain type: gcc, clang, xlc, microsoft...
 TOOLCHAIN_TYPE := @TOOLCHAIN_TYPE@
@@ -487,7 +487,7 @@ HOTSPOT_TOOLCHAIN_TYPE := @HOTSPOT_TOOLCHAIN_TYPE@
 
 # Option used to tell the compiler whether to create 32- or 64-bit executables
 COMPILER_TARGET_BITS_FLAG := @COMPILER_TARGET_BITS_FLAG@
-COMPILER_SUPPORTS_TARGET_BITS_FLAG = @COMPILER_SUPPORTS_TARGET_BITS_FLAG@
+COMPILER_SUPPORTS_TARGET_BITS_FLAG := @COMPILER_SUPPORTS_TARGET_BITS_FLAG@
 
 # Option used to pass a command file to the compiler
 COMPILER_COMMAND_FILE_FLAG := @COMPILER_COMMAND_FILE_FLAG@
@@ -526,8 +526,8 @@ DISABLED_WARNINGS_CXX := @DISABLED_WARNINGS_CXX@
 WARNINGS_AS_ERRORS := @WARNINGS_AS_ERRORS@
 
 CFLAGS_CCACHE := @CFLAGS_CCACHE@
-ADLC_LANGSTD_CXXFLAGS = @ADLC_LANGSTD_CXXFLAGS@
-ADLC_LDFLAGS = @ADLC_LDFLAGS@
+ADLC_LANGSTD_CXXFLAGS := @ADLC_LANGSTD_CXXFLAGS@
+ADLC_LDFLAGS := @ADLC_LDFLAGS@
 
 # Tools that potentially need to be cross compilation aware.
 CC := @CCACHE@ @ICECC@ @CC@
@@ -551,10 +551,10 @@ BASIC_ASFLAGS := @BASIC_ASFLAGS@
 MACHINE_FLAG := @MACHINE_FLAG@
 
 # These flags might contain variables set by a custom extension that is included later.
-EXTRA_CFLAGS = @EXTRA_CFLAGS@
-EXTRA_CXXFLAGS = @EXTRA_CXXFLAGS@
-EXTRA_LDFLAGS = @EXTRA_LDFLAGS@
-EXTRA_ASFLAGS = @EXTRA_ASFLAGS@
+EXTRA_CFLAGS := @EXTRA_CFLAGS@
+EXTRA_CXXFLAGS := @EXTRA_CXXFLAGS@
+EXTRA_LDFLAGS := @EXTRA_LDFLAGS@
+EXTRA_ASFLAGS := @EXTRA_ASFLAGS@
 
 CXX := @CCACHE@ @ICECC@ @CXX@
 
@@ -633,25 +633,26 @@ ASFLAGS_DEBUG_SYMBOLS := @ASFLAGS_DEBUG_SYMBOLS@
 
 #
 # Compress (or not) jars
-COMPRESS_JARS = @COMPRESS_JARS@
+COMPRESS_JARS := @COMPRESS_JARS@
 
 # Options to linker to specify the library name.
 # (Note absence of := assignment, because we do not want to evaluate the macro body here)
 SET_SHARED_LIBRARY_NAME = @SET_SHARED_LIBRARY_NAME@
 
-SHARED_LIBRARY_FLAGS = @SHARED_LIBRARY_FLAGS@
+SHARED_LIBRARY_FLAGS := @SHARED_LIBRARY_FLAGS@
 
 # Set origin using the linker, ie use the relative path to the dependent library to find the dependencies.
 # (Note absence of := assignment, because we do not want to evaluate the macro body here)
 SET_SHARED_LIBRARY_ORIGIN = @SET_SHARED_LIBRARY_ORIGIN@
 SET_EXECUTABLE_ORIGIN = @SET_EXECUTABLE_ORIGIN@
 
 # Different OS:es have different ways of naming shared libraries.
-# The SHARED_LIBRARY macro takes "verify" as and argument and returns:
+# The SHARED_LIBRARY and STATIC_LIBRARY macros takes "verify" as and argument and returns:
 #    "libverify.so" or "libverify.dylib" or "verify.dll" depending on platform.
 # (Note absence of := assignment, because we do not want to evaluate the macro body here)
 SHARED_LIBRARY = @SHARED_LIBRARY@
 STATIC_LIBRARY = @STATIC_LIBRARY@
+
 LIBRARY_PREFIX := @LIBRARY_PREFIX@
 SHARED_LIBRARY_SUFFIX := @SHARED_LIBRARY_SUFFIX@
 STATIC_LIBRARY_SUFFIX := @STATIC_LIBRARY_SUFFIX@
@@ -719,8 +720,8 @@ INTERIM_LANGTOOLS_ARGS := \
     --patch-module java.base=$(BUILDTOOLS_OUTPUTDIR)/gensrc/java.base.interim \
     $(INTERIM_LANGTOOLS_ADD_EXPORTS) \
     #
-JAVAC_MAIN_CLASS = -m jdk.compiler.interim/com.sun.tools.javac.Main
-JAVADOC_MAIN_CLASS = -m jdk.javadoc.interim/jdk.javadoc.internal.tool.Main
+JAVAC_MAIN_CLASS := -m jdk.compiler.interim/com.sun.tools.javac.Main
+JAVADOC_MAIN_CLASS := -m jdk.javadoc.interim/jdk.javadoc.internal.tool.Main
 
 # You run the new javac using the boot jdk with $(BOOT_JDK)/bin/java $(NEW_JAVAC) ...
 # Use = assignment to be able to override in bootcycle-spec.gmk
@@ -845,9 +846,9 @@ PNG_CFLAGS := @PNG_CFLAGS@
 # Misc
 #
 
-INCLUDE_SA = @INCLUDE_SA@
-INCLUDE_JVMCI = @INCLUDE_JVMCI@
-INCLUDE_COMPILER2 = @INCLUDE_COMPILER2@
+INCLUDE_SA := @INCLUDE_SA@
+INCLUDE_JVMCI := @INCLUDE_JVMCI@
+INCLUDE_COMPILER2 := @INCLUDE_COMPILER2@
 
 OS_VERSION_MAJOR := @OS_VERSION_MAJOR@
 OS_VERSION_MINOR := @OS_VERSION_MINOR@
@@ -898,10 +899,10 @@ GRAAL_BUILDER_IMAGE_SUBDIR := graal-builder-jdk
 GRAAL_BUILDER_IMAGE_DIR := $(IMAGES_OUTPUTDIR)/$(GRAAL_BUILDER_IMAGE_SUBDIR)
 
 # Macosx bundles directory definitions
-JDK_MACOSX_BUNDLE_SUBDIR = jdk-bundle
-JRE_MACOSX_BUNDLE_SUBDIR = jre-bundle
-JDK_MACOSX_BUNDLE_SUBDIR_SIGNED = jdk-bundle-signed
-JRE_MACOSX_BUNDLE_SUBDIR_SIGNED = jre-bundle-signed
+JDK_MACOSX_BUNDLE_SUBDIR := jdk-bundle
+JRE_MACOSX_BUNDLE_SUBDIR := jre-bundle
+JDK_MACOSX_BUNDLE_SUBDIR_SIGNED := jdk-bundle-signed
+JRE_MACOSX_BUNDLE_SUBDIR_SIGNED := jre-bundle-signed
 JDK_MACOSX_BUNDLE_DIR = $(IMAGES_OUTPUTDIR)/$(JDK_MACOSX_BUNDLE_SUBDIR)
 JRE_MACOSX_BUNDLE_DIR = $(IMAGES_OUTPUTDIR)/$(JRE_MACOSX_BUNDLE_SUBDIR)
 JDK_MACOSX_BUNDLE_DIR_SIGNED = $(IMAGES_OUTPUTDIR)/$(JDK_MACOSX_BUNDLE_SUBDIR_SIGNED)