Makefile - variables

Note: Non-functional links can be fixed by inserting en/.

Variable name	Description
`ADD_TO_DEF_FILE`
`CPP_SOURCES`
`CPP_UNIT_TESTS`	A list of source files to compile as unit tests.
`CSRCS`	A list of C source files to compile.
`DEFINES`	Additional preprocessor defines for C++
`EXPAND_MOZLIBNAME`
`EXPORTS`	A list of exported header files and sources to install for external use.
`EXPORTS_NAMESPACES`	Exported package include directory: `dist/include/${namespace}`
`EXPORTS_${namespace}`	A list of exports/headers that should be copied into the exported namespace directory.
`EXTRA_COMPONENTS`	`nsDefaultCLH.manifest, JavaScript XPCOMM files`
`EXTRA_DSO_LIBS`
`EXTRA_DSO_LDOPTS`
`EXTRA_JS_MODULES`
`EXTRA_PP_COMPONENTS`	`XPCOMM files to pre-process before installation.`
`GARBAGE`	A "clean target" macro containing a list of files to remove.
`GARBAGE_DIRS`	A "clean target" macro containing a list of directories to remove.
`GLOBAL_DEPS`	A list of common dependencies (`Makefile.in`, `autoconf.mk`) that will force rebuilding.
`LIBOBJS`
`HAVE_DTRACE`	Sun Microsystem's dynamic tracing environment is available.
`LOCAL_INCLUDES`	Allow use of `MOZ_OBJDIR` in `.mozconfig` with older GNU gcc on BeOS.
`MODULE`
`MODULE_NAME`
`NO_DIST_INSTALL`	Inhibit generating and copying exports/install targets into `$(MOZ_OBJDIR)/dist/install`.
`.NS_PRINTING`
`OBJS`
`OBJ_SUFFIX`	Filename suffix to use when writing object files.
`MODULE`	Instructs the build system where to install exported headers.
`SIMPLE_PROGRAMS`
`SUPPRESS_DEFAULT_RULES`	Inhibit processing of `Makefile` TIER targets/directory processing will be unordered.
`TIER`	Build order dependencies - subdirectories for make to traverse prior to building current.
`XPIDL_MODULE`	Module name to use when generating `.xpt` files, default to MODULE.
`XPIDLSRCS`	Internal: A list of `.idl` files to generate exported headers from.
XPIDL_NAME	Name of extension to build see also

configure.sh Variables	Description
`BUILD_PROJECT_ARG`	Command line/environment override
`CONFIGURE_ENV_ARGS`	Command line/environment override

Directory Variable
`DIRS`	A list of subdirectories to build recursively.
`PARALLEL_DIRS`	A list of subdirectories to build recursively that may be built concurrently.
`STATIC_DIRS`	Subdirectories containing static makefiles that are not autogenerated.
`TEST_DIRS`	A list of directories containing test makefiles
`TOOL_DIRS`	A list of directories to process makefile 'tool' targets in.

MOZ_ Variable	Description
`MOZ_AUTO_DEPS`
`MOZ_BUILD_APP`
`MOZ_BUILD_PROJECTS`	Build multiple projects in the same sandbox. `Dest=$(MOZ_OBJDIR)/$project`
`MOZ_CURRENT_PROJECT`
`MOZ_DEBUG`
`MOZ_ENABLE_XREMOTE`
`MOZ_FEEDS`
`MOZ_HELP_VIEWER`
`MOZ_NATIVE_NSPR`
MOZ_METRO
`MOZ_PKG_MAINFEST`
`MOZ_PREFLIGHT_ALL`
`MOZ_RDF`
`MOZ_TOOLKIT_SEARCH`
`MOZ_URL_CLASSIFIER`
`MOZ_WIDGET_TOOLKIT`	Android, BeOS, Cocoa, GTK2, OS2, Qt, Windows
`MOZ_XPCTOOLS`
`MOZ_XUL`
`MOZ_X11`

Test Variable	Description
`ENABLE_TESTS`	Boolean value that should wrapper all unit tests to allow disabling on demand[1].
PYTHON_UNIT_TESTS	List of python scripts to check exit status for `make check`
`XPC_SHELL_TESTS`
`NO_XPCSHELL_MANIFEST_CHECK`	Inhibit validating manifest files when running xpcshell tests.

Compiler Variable	Description
`GNU_CC`	Defined if the GNU gcc compiler is available.
`MODULE_OPTIMIZE_FLAGS`	Additional flags for enabling or overriding compiler optimizations(-O2).
`SOLARIS_SUNPRO_CC`	Sun Studio compiler

Export Variables	Description
`AUTOCFG_JS_EXPORTS`
`EXPORTS`	A list of exported headers and source files for external use.
`HAS_EXTRA_EXPORTS`
`PREF_JS_EXPORTS`	JavaScript preferences file to export[1].
`SDK_HEADERS`

Makefile Generation	Description
`NO_MAKEFILE_RULE [pending]`	Inhibit Makefile.in deps that would allow $obj/Makefile to be generated.
`NO_SUBMAKEFILE_RULE [pending/redundant?]`	Inhibit Makefile generation within subdirectories.

NO_ Variable	Description
`NO_PROFILE_GUIDED_OPTIMIZE`	Inhibit PGO builds
`NO_DIST_INSTALL`

Note: Values will be appended to the EXPORT variable when present.

OS_ Variable	Description
`OS_ARCH`	Platform type
`OS_TARGET`	Target binary type if building on an intermediate platform(building mobile binaries on GNU/Linux).

HOST_ Variable	Description
`HOST_CMSRCS`	A list of `.m` sources to compile
`HOST_CMMSRCS`	A list of `.mm` sources to compile
`HOST_OBJS`
`HOST_OS_ARCH`	`ARCH` of real platform a target platform is being built on(building mobile binaries on GNU/Linux).

Distribution/Release variables

Variable	Description
`DIST`	Top level distribution directory for install/packaging/repacking.
`DIST_FILES`	A list of files copied into the distribution archive(`~application.ini`).
`DIST_CHROME_FILES`	Exists in `rules.mk` but not referenced by `mozilla-central`. Deprecated?
FINAL_TARGET	Directory to install distributed content. default=$(DIST)/bin
XPI_NAME	If set FINAL_TARGET=$(DIST)/xpi-stage/$(XPI_NAME)
DIST_SUBDIR	If set FINAL_TARGET will be $(DIST)/bin/$(DIST_SUBDIR) [ metro build ]

l10n.mk and localization

Variable	Description
`EN_US_BINARY_URL`	Server URL from which `wget` will FTP binaries.
`L10NBASEDIR`
`MOZ_CHROME_MULTILOCALE`	A list of locale names to process
`MOZ_CHROME_FILE_FORMAT`	both, file, jar, omni, symlink
`PACKAGER_NO_LIBS`	Hack to allow one `makefile` to include another without pulling in `libs::` target definitions.
`STAGEDIST`	Local staging directory for localization and packaging.

Todo:

xpcom/xpinstall variables: https://developer.mozilla.org/en/Adding_XPCOM_components_to_Mozilla_build_system