> N.B. If you're interested in building Midipix using this script, please join the project's

IRC channel #midipix on Freenode and ask for the address of the internal repositories.

> N.B. If in doubt, consult the fault-tolerant & highly optimised 3D laser show-equipped

usage screen w/ ./build.sh -h or a hungry lion might eat you alive.

## Building a midipix distribution

A Midipix distribution consists of the following:

* the native Midipix toolchain, consisting of perk, gcc, its dependencies,

  and binutils,

* musl, a lightweight, fast, simple, and free libc[1] used by Midipix,

* the Midipix runtime components that bridge the gap between the libc and the

  executive subsystems of all Windows NT-derived Windows OS starting with and

  including Windows XP, and

* a steadily increasing number of 3rd party open source packages, as expected in

  any modern POSIX-compliant \*nix environment, including GNU coreutils, shells,

  libraries such as ncurses, libressl, as well as Perl and Python.

Install the build-time dependencies listed below, clone this repository, and run the

following command line within the latter:  

```shell

./build.sh -a nt64 -b release -D minipix,zipdist -P -v

```

### Build-time dependencies

* **Alpine Linux**: binutils bzip2 cmake coreutils curl findutils g++ gawk gcc git grep gzip libc-dev linux-headers lzip make musl-dev net-tools patch perl perl-xml-parser procps sed tar util-linux wget xz zip

* **Debian/-derived Linux**: binutils bzip2 clzip cmake coreutils curl findutils g++ gawk gcc git grep gzip hostname libc6-dev libxml-parser-perl lzma make patch perl procps sed tar util-linux wget xz-utils zip

* **OpenSUSE Linux**: binutils bzip2 cmake coreutils curl findutils gawk gcc gcc-c++ git grep gzip hostname linux-glibc-devel lzip make patch perl perl-XML-Parser procps sed tar util-linux wget xz zip

> N.B. Busybox is not supported.

> N.B. Some packages (*coreutils*, *grep*, and *tar*, among others) override

Alpine's BusyBox utilities of the same name, as the latter are either non-

conformant or defective.

## Non-exhaustive list of build variables

The following variables are primarily defined in ``midipix.env`` and may be overriden

on a per-build basis on the command-line after the last argument, if any, e.g.:

```shell

./build.sh -a nt64 -b release -D minipix,zipdist -P -v PREFIX_ROOT="${HOME}/midipix_tmp"

```

Furthermore, ``${HOME}/midipix_build.vars``, ``${HOME}/.midipix_build.vars``, and/or

``../midipix_build.vars`` are sourced during build initialisation and may contain

additional overrides, particularly ``${DEFAULT_GITROOT_HEAD}``.

| Variable name    | Default value                   | Description                                                                   |

| ---------------- | ------------------------------- | ----------------------------------------------------------------------------- |

| ARCH             | nt64                            | Target 32-bit (nt32) or 64-bit (nt64) architecture                            |

| BUILD            | debug                           | Build w/ debugging (debug) or release compiler flags                          |

| BUILD_DLCACHEDIR | ${PREFIX_ROOT}/dlcache          | Absolute pathname to package downloads cache root directory                   |

| BUILD_WORKDIR    | ${PREFIX}/tmp                   | Absolute pathname to temporary package build root directory                   |

| PREFIX           | ${PREFIX_ROOT}/${ARCH}/${BUILD} | Absolute pathname to architecture- & build type-specific build root directory |

| PREFIX_CROSS     | ${PREFIX}/${DEFAULT_TARGET}     | Absolute pathname to toolchain root directory                                 |

| PREFIX_MINGW32   | ${PREFIX}/x86_64-w64-mingw32    | Absolute pathname to MinGW toolchain root directory                           |

| PREFIX_MINIPIX   | ${PREFIX}/minipix               | Absolute pathname to minipix distribution root directory                      |

| PREFIX_NATIVE    | ${PREFIX}/native                | Absolute pathname to cross-compiled packages root directory                   |

| PREFIX_ROOT      | ${HOME}/midipix                 | Absolute pathname to top-level directory                                      |

| PREFIX_RPM       | ${PREFIX}/rpm                   | Absolute pathname to package RPM archive root directory                       |

## Common tasks

Rebuild set of packages in isolation, along w/ their dependencies, if any, as needed,

or forcibly, respectively:

```shell

./build.sh [ ... ] -r mc,zsh

./build.sh [ ... ] -r \*mc,zsh

./build.sh [ ... ] -r \*\*mc,zsh

```

Rebuild entire build group:

```shell

./build.sh [ ... ] -r ALL native_runtime

```

## References

* ``Sun, 25 Apr 2016 09:04:08 +0000 [1]`` musl FAQ  

vim:tw=0