dmd.mars

Entry point for DMD.

Discussion

This modules defines the entry point (main) for DMD, as well as related utilities needed for arguments parsing, path manipulation, etc... This file is not shared with other compilers which use the DMD front-end.

Authors

Walter Bright

License

Boost License 1.0

Source: mars.d

Documentation: https://dlang.org/phobos/dmd_mars.html

Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/mars.d

  • parseCommandlineAndConfig

    Declaration

    bool parseCommandlineAndConfig(size_t argc, const(char)** argv, ref Param params, ref Strings files);

    Parses the command line arguments and configuration files

    Parameters

    size_t argc

    Number of arguments passed via command line

    const(char)** argv

    Array of string arguments passed via command line

    Param params

    parametes from argv

    Strings files

    files from argv

    Return Value

    true on faiure

  • emitMakeDeps

    Declaration

    void emitMakeDeps(ref Param params);

    Emit the makefile dependencies for the -makedeps switch

  • main

    Declaration

    int main(int argc, char** argv);

    DMD's entry point, C main.

    Discussion

    Without -lowmem, we need to switch to the bump-pointer allocation scheme right from the start, before any module ctors are run, so we need this hook before druntime is initialized and _Dmain is called.

    Return Value

    Return code of the application

  • _Dmain

    Declaration

    int _Dmain(char[][]);

    Manual D main (for druntime initialization), which forwards to tryMain.

    Return Value

    Return code of the application

  • getenv_setargv

    Declaration

    void getenv_setargv(const(char)* envvalue, Strings* args);

    Parses an environment variable containing command-line flags and append them to args.

    Discussion

    This function is used to read the content of DFLAGS. Flags are separated based on spaces and tabs.

    Parameters

    const(char)* envvalue

    The content of an environment variable

    Strings* args

    Array to append the flags to, if any.

  • parse_arch_arg

    Declaration

    const(char)[] parse_arch_arg(Strings* args, const(char)[] arch);

    Parse command line arguments for the last instance of -m32, -m64, -m32mscoff or -m32omfobj to detect the desired architecture.

    Parameters

    Strings* args

    Command line arguments

    const(char)[] arch

    Default value to use for architecture. Should be "32" or "64"

    Return Value

    "32", "64" or "32omf" if the "-m32", "-m64", "-m32omf" flags were passed, respectively. If they weren't, return arch.

  • parse_conf_arg

    Declaration

    const(char)[] parse_conf_arg(Strings* args);

    Parse command line arguments for the last instance of -conf=path.

    Parameters

    Strings* args

    Command line arguments

    Return Value

    The 'path' in -conf=path, which is the path to the config file to use

  • addDefaultVersionIdentifiers

    Declaration

    void addDefaultVersionIdentifiers(const ref Param params, const ref Target tgt);

    Add default version identifier for dmd, and set the target platform in params. https://dlang.org/spec/version.html#predefined-versions

    Discussion

    Needs to be run after all arguments parsing (command line, DFLAGS environment variable and config file) in order to add final flags (such as X86_64 or the CRuntime used).

    Parameters

    Param params

    which target to compile for (set by setTarget())

    Target tgt

    target

  • flushMixins

    Declaration

    void flushMixins();

    we want to write the mixin expansion file also on error, but there are too many ways to terminate dmd (e.g. fatal() which calls exit(EXIT_FAILURE)), so we can't rely on scope(exit) ... in tryMain() actually being executed so we add atexit(&flushMixins); for those fatal exits (with the GC still valid)

  • parseCommandLine

    Declaration

    bool parseCommandLine(const ref Strings arguments, const size_t argc, ref Param params, ref Strings files, ref Target target);

    Parse command line arguments.

    Discussion

    Prints message(s) if there are errors.

    Parameters

    Strings arguments

    command line arguments

    size_t argc

    argument count

    Param params

    set to result of parsing arguments

    Strings files

    set to files pulled from arguments

    Target target

    more things set to result of parsing arguments

    Return Value

    true if errors in command line

  • moduleWithEmptyMain

    Declaration

    Module moduleWithEmptyMain();

    Return Value

    a compiled module (semantic3) containing an empty main() function, for the -main flag