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Estimated hours taken: 500 Add an alternative implementation of Mmake as part of the compiler. The advantages of this are - more accurate dependencies - no `mmake depend' step - less process creation (no processes are created to build interface files). Still to do: - handle --split-c-files - handle the IL backend properly - library installation - allow the compiler to be built and the nightly tests to be run with `mmc --make' compiler/make.m: Control the build process. compiler/make.program_target.m: Build executables and libraries. compiler/make.module_target.m: Build C files, object files, interface files etc. compiler/make.dependencies.m: Work out the depenendencies between targets. compiler/make.module_dep_file.m: Record the inter-module dependencies between invocations of mmc. compiler/make.util.m: Utility predicates used by `mmc --make'. compiler/compile_target_code.m: This module will eventually contain the predicates used to compile the target code files generated by the compiler which are now in mercury_compile.m. (That will be done as a separate change for ease of reviewing). For now compile_target_code.m compiler/mercury_compile.m: Export the predicates used to compile target code. Call make.m. Pass the name of the top-level module in the source file to modules.m. It is needed when generating the `.module_dep' files. Lookup the option defaults (which will eventually be stored in DEFAULT_MCFLAGS by the mmc script) before compiling. Up until now the option defaults have been passed on the command line by the mmc script, but with `mmc --make' the default options need to be overridden by the value of the MCFLAGS make variable, but the MCFLAGS make variable is overridden by command line options. Pass the value of `--link-flags' to c2init. Remove some uninformative messages printed when a C, IL, etc. compilation fails. compiler/options_file.m: Read files containing Make style variable assignments. compiler/options.m: doc/user_guide.texi: Add a new options category: build system options. Add some extra options: --warn-undefined-options-variables - like mmake --warn-undefined-vars --verbose-commands - print commands that the user might be interested in, like C compilation, but not things like mercury_update_interface. --output-compile-error-lines - print the first n lines of the error file generated by a command. --generate-mmc-make-modules-dependencies - generate dependencies for use by `mmc --make' even when using Mmake. --il-assembler, --ilasm-flags, --mcpp-compiler, --mcpp-flags, --csharp-compiler, --csharp-flags, --install-prefix, --install-command, --libgrades, --options-files, --options-search-directories. compiler/modules.m: Add fields to the `module_imports' type for use by make.*m. Don't try to fill in fields of the module_imports structure lazily. It's error prone, and probably doesn't save much anyway. Clean up the code to compute what foreign languages are used by a list of item. Simplify the handling of fact tables by recording that a module containing fact tables has foreign code to implement them, rather than requiring separate checks everywhere. Generalise predicates like get_interface so that they work even after the imported items have been read. Fix the handling of header files with the LLDS backend. Install the `.module_dep' files created for use by `mmc --make'. compiler/*.m: Use record syntax rather than explicit deconstruction to refer to fields of the `module_imports' type. compiler/*.m: Be more careful about where output goes. mercury_compile.m sets the output stream to be io__stderr_stream at the start of compilation, so remove all explicit writes to io__stderr_stream (with `--make' the error output stream may be a `.err' file, not io__stderr_stream). Change all occurrences of io__tell/io__told to use io__open_output/io__close_output (io__told restores the current output stream to io__stdout_stream, not the previous value). compiler/passes_aux.m: Make the output from system commands go to the current output stream, not C stdout and stderr. Allow commands to be printed with `--verbose-commands'. Remove uninformative error messages when a command fails. compiler/timestamp.m: Add functions oldest_timestamp and newest_timestamp. compiler/llds_out.m: Record the number of C files written with `--split-c-files' in <module>.num_split. compiler/prog_io.m: compiler/*.m: `search_for_file' now returns the directory in which the file was found. compiler/foreign.m: Use sub-typing to make some calls to predicates in this module `det' rather than `semidet'. compiler/handle_options.m: Return the option arguments. compiler/Mmakefile: make.util.m refers to kill() and `struct sigaction' which are not exported from <signal.h> unless `--no-ansi' is passed to gcc. compiler/notes/compiler_design.html: Document the new modules. runtime/mercury_signal.h: runtime/mercury_signal.c: Add a function MR_signal_should_restart() which alters whether a signal restarts or interrupts system calls. In general restarting is the preferred behaviour, but the wait() for a child process needs to be interruptible. scripts/Mmake.vars.in: Add subdirs for `.module_dep', `.err_date' and `.num_split' files. library/io.m: Add a version of io_call_system which returns the signal that killed the command rather than converting it into an error message. Add a predicate to interpret the result of system() or wait(). library/list.m: Add list__map_foldl2 and a unique mode for list__foldl3. NEWS: Document the new library predicates. configure.in: runtime/mercury_conf.h.in: Check for siginterrupt(). doc/user_guide.texi: Document the new options. Add a description of `mmc --make' to the "Using Mmake" chapter.