Initial commit.

.editorconfig

@@ -0,0 +1,25 @@
+root = true
+
+[*]
+charset = utf-8
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 120
+tab_width = 4
+trim_trailing_whitespace = true
+
+[*.json]
+indent_size = 2
+
+[*.jsonc]
+indent_size = 2
+
+[*.vsconfig]
+indent_size = 2
+
+[*.yaml]
+indent_size = 2
+
+[*.yml]
+indent_size = 2

.gitattributes

@@ -0,0 +1,7 @@
+* text
+*.verified.* text eol=lf
+*.ico binary
+*.pdf binary
+*.png binary
+*.zig eol=lf
+*.zon eol=lf

.github/CODEOWNERS

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+* @vezel-dev/graf-maintainers

.github/dependabot.yml

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+# yaml-language-server: $schema=https://json.schemastore.org/dependabot-2.0.json
+version: 2
+updates:
+  - package-ecosystem: nuget
+    directories:
+      - /
+    schedule:
+      interval: daily
+      timezone: Europe/Copenhagen
+      time: "12:00"
+    open-pull-requests-limit: 25
+    labels: []

.gitignore

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+/out

.gitmodules

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+[submodule "pkg/binutils-gdb"]
+	path = pkg/binutils-gdb
+    url = https://sourceware.org/git/binutils-gdb.git
+    shallow = true
+[submodule "pkg/gcc"]
+	path = pkg/gcc
+	url = https://gcc.gnu.org/git/gcc.git
+    shallow = true
+[submodule "pkg/glibc"]
+	path = pkg/glibc
+    url = https://sourceware.org/git/glibc.git
+    shallow = true
+[submodule "pkg/linux"]
+	path = pkg/linux
+    url = https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
+    shallow = true
+[submodule "pkg/musl"]
+	path = pkg/musl
+    url = git://git.musl-libc.org/musl
+    shallow = true
+[submodule "pkg/newlib-cygwin"]
+	path = pkg/newlib-cygwin
+	url = https://sourceware.org/git/newlib-cygwin.git
+    shallow = true

.markdownlint.json

@@ -0,0 +1,95 @@
+{
+  "$schema": "https://raw.githubusercontent.com/DavidAnson/markdownlint/main/schema/markdownlint-config-schema.json",
+  "default": true,
+  "MD001": true,
+  "MD003": {
+    "style": "atx"
+  },
+  "MD004": {
+    "style": "asterisk"
+  },
+  "MD005": true,
+  "MD007": {
+    "start_indented": false,
+    "start_indent": 4,
+    "indent": 4
+  },
+  "MD009": {
+    "br_spaces": 0,
+    "strict": true
+  },
+  "MD010": {
+    "spaces_per_tab": 4
+  },
+  "MD011": true,
+  "MD012": true,
+  "MD013": {
+    "code_blocks": false,
+    "headings": false,
+    "tables": false
+  },
+  "MD014": true,
+  "MD018": true,
+  "MD019": true,
+  "MD020": true,
+  "MD021": true,
+  "MD022": true,
+  "MD023": true,
+  "MD024": true,
+  "MD025": true,
+  "MD026": {
+    "punctuation": "!,.:;?"
+  },
+  "MD027": true,
+  "MD028": true,
+  "MD029": {
+    "style": "ordered"
+  },
+  "MD030": true,
+  "MD031": true,
+  "MD032": true,
+  "MD033": {
+    "allowed_elements": [
+      "div",
+      "img",
+      "p",
+      "strong"
+    ]
+  },
+  "MD034": true,
+  "MD035": {
+    "style": "--------------------------------------------------------------------------------"
+  },
+  "MD036": {
+    "punctuation": "!,.:;?"
+  },
+  "MD037": true,
+  "MD038": true,
+  "MD039": true,
+  "MD040": {
+    "language_only": true
+  },
+  "MD041": true,
+  "MD042": true,
+  "MD043": false,
+  "MD044": true,
+  "MD045": true,
+  "MD046": {
+    "style": "fenced"
+  },
+  "MD047": true,
+  "MD048": {
+    "style": "backtick"
+  },
+  "MD049": {
+    "style": "asterisk"
+  },
+  "MD050": {
+    "style": "asterisk"
+  },
+  "MD051": true,
+  "MD052": true,
+  "MD053": {
+    "ignored_definitions": []
+  }
+}

.netconfig

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+[file ".editorconfig"]
+	url = https://github.com/vezel-dev/.github/blob/master/syn/.editorconfig
+	sha = 25cfbb6a508a9fcf8444ef283ddfe7b2e5121bca
+	etag = df90691e6bc4d301e82e508fca55eed234028a335c3615cf916db00cb4a053f1
+	weak
+[file ".gitattributes"]
+	url = https://github.com/vezel-dev/.github/blob/master/syn/.gitattributes
+	sha = 0ff05334db6d820dd16428e1aad477ed83ca10ef
+	etag = 0a6a1f6373760bc1c03e09e1efeeb77109705f11b159afd759e11550b45ee950
+	weak
+[file ".markdownlint.json"]
+	url = https://github.com/vezel-dev/.github/blob/master/syn/.markdownlint.json
+	sha = 7d581ae5eedad5892855cebc673edafad664856b
+	etag = cf98ac95cf318b52e206b9003e342de9db2ecb7be062eab6edf1681b1f374b3a
+	weak
+[file "LICENSE-0BSD"]
+	url = https://github.com/vezel-dev/.github/blob/master/syn/LICENSE-0BSD
+	sha = 7d581ae5eedad5892855cebc673edafad664856b
+	etag = 4fe195e9c11a20688615d92035ac752eeac4ab3f3d82b20df798ea6dc1b49aab
+	weak

.vscode/extensions.json

@@ -0,0 +1,12 @@
+{
+  "recommendations": [
+    "chdsbd.github-code-owners",
+    "codezombiech.gitignore",
+    "davidanson.vscode-markdownlint",
+    "editorconfig.editorconfig",
+    "github.vscode-github-actions",
+    "github.vscode-pull-request-github",
+    "redhat.vscode-yaml",
+    "yy0931.gitconfig-lsp"
+  ]
+}

.vscode/settings.json

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+{
+  "files.exclude": {
+    "out": true
+  }
+}

GNUmakefile

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+# SPDX-License-Identifier: 0BSD
+
+include bld/common.mk
+
+packages = $(sort $(foreach package,$(wildcard pkg/*),$(notdir $(package))))
+targets = $(sort $(foreach target,$(wildcard tgt/*.mk),$(basename $(notdir $(target)))))
+
+.PHONY: list
+list:
+>   $(Q)echo "Supported targets:"
+>   $(Q)echo
+>   $(Q)for target in $(targets); do echo "    $$target"; done
+>   $(Q)echo
+>   $(Q)echo "Run 'make <target> PREFIX=...' to build and install a toolchain."
+
+# $(1) = target
+define build_toolchain
+.PHONY: $(1)
+$(1):
+>   $(Q)$(MAKE) clean
+>   $(Q)$(MAKE) -C tgt -f $(1).mk -I ../bld
+endef
+
+$(foreach target,$(targets),$(eval $(call build_toolchain,$(target))))
+
+.PHONY: all
+all: $(targets)
+
+# $(1) = package
+define clean_package
+.PHONY: clean-$(1)
+clean-$(1):
+>   $(Q)echo "Cleaning $(1)..."
+>   $(Q)cd pkg/$(1) && $(RM) -f -r build
+endef
+
+$(foreach package,$(packages),$(eval $(call clean_package,$(package))))
+
+.PHONY: clean
+clean: $(foreach package,$(packages),clean-$(package))

LICENSE-0BSD

@@ -0,0 +1,12 @@
+BSD Zero Clause License (0BSD)
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.

README.md

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+# Kruco
+
+This is a makefile that simplifies the creation of [GCC](https://gcc.gnu.org)
+cross-toolchains for a wide variety of target platforms.
+
+The toolchains produced by this makefile are *probably* not appropriate for
+building production software. The point of this makefile is just to be able to
+type a single command and have a toolchain that is useful for development and
+testing purposes in less than 15 minutes.
+
+## Caveats
+
+* This makefile is only tested regularly on modern Linux machines. It *might*
+  work in other Unix-like environments, but we make no promises.
+* The versions for Linux kernel headers, [glibc](https://sourceware.org/glibc),
+  and [musl](https://musl.libc.org) are generally pinned to whatever the latest
+  release of [Zig](https://ziglang.org) supports.
+* You need to install various build prerequisites yourself, including some
+  libraries. The build is done in this way to reduce the size of the generated
+  toolchains.
+
+## Usage
+
+In a nutshell, usage is as follows:
+
+1. Clone this repository.
+2. Run `make list` to get a list of supported targets.
+3. Run `make <target> PREFIX=...` to build and install a toolchain.
+4. Run `make clean` to remove leftover build artifacts.
+
+For example, `make arm-linux-gnueabi PREFIX=$HOME/cross` will install a
+toolchain targeting Linux and glibc under `$HOME/cross/arm-linux-gnueabi` with a
+sysroot under `$HOME/cross/arm-linux-gnueabi/sysroot`.
+
+If you need to use your computer as an expensive space heater and/or you have a
+burning hatred for your CPU and disk drive, you can run `make all` to build a
+toolchain for every single supported target. That is 400+ toolchains, just to be
+clear. You probably should not do that. But you *can*.
+
+## Configuration
+
+The following variables affect the makefile:
+
+* `PREFIX`: The location to install the built toolchain in. Note that the
+  toolchain will actually be installed under `$PREFIX/<target>`. Defaults to the
+  `out` directory in the root of the repository.
+* `BUILD`: The platform that you are building the toolchain on. This defaults to
+  `x86_64-cross-linux-gnu`. The `cross` vendor component is crucial here, as it
+  forces Autotools to run in cross-compilation mode. You only need to set this
+  if you are building on a different platform, e.g. `aarch64-cross-linux-gnu`.
+* `JOBS`: The maximum number of concurrent jobs that will be used while building
+  each software package. Defaults to the output of `nproc`, i.e. as many jobs as
+  you have CPU cores.
+* `V`: Can be set to any value to get verbose output from the makefile.
+
+## License
+
+The build system is licensed under the terms found in
+[`LICENSE-0BSD`](LICENSE-0BSD). Each software package that is built has its own
+license terms.

bld/common.mk

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+# SPDX-License-Identifier: 0BSD
+
+# Disable some slow and/or unhelpful features.
+MAKEFLAGS += -R -r --warn-undefined-variables
+
+# Avoid shell portability issues.
+SHELL = bash
+.SHELLFLAGS = -e -o pipefail -u -c
+
+# Avoid the need for tabs.
+.RECIPEPREFIX = >
+
+# We parallelize package builds, but our makefiles should be serial.
+.NOTPARALLEL:
+
+# Tools used throughout our makefiles.
+FIND ?= find
+MKDIR ?= mkdir
+NPROC ?= nproc
+RM ?= rm
+SED ?= sed
+XARGS ?= xargs
+
+# How many jobs should we use in package builds?
+JOBS ?= $(shell $(NPROC))
+
+# Only echo commands if requested by the user with the V variable.
+ifdef V
+    Q =
+else
+    Q = @
+endif

bld/kernel/freestanding.mk

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+# SPDX-License-Identifier: 0BSD
+
+# Nothing to do.
+build-kernel:

bld/kernel/linux.mk

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+# SPDX-License-Identifier: 0BSD
+
+build-kernel:
+>   $(Q)$(call cd_pkg,linux) && $(RM) -f -r build
+>   $(Q)$(call cd_pkg,linux) && $(make_j) headers_install \
+        O=build \
+        ARCH=$(arch) \
+        INSTALL_HDR_PATH=$(sysroot)/usr