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GNU AFFERO GENERAL PUBLIC LICENSE
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#+TITLE: Bootstrappable.org website
Hi there! This is the code for the [[bootstrappable.org]] website. It is a static site generated with [[http://haunt.dthompson.us/][Haunt]].
* Hacking
Here’s how to get Haunt and build the site:
#+BEGIN_SRC sh
cd /path/to/this/dir
guix package -i haunt
haunt build
#+END_SRC
This will create a =site= directory containing the built website.
Hacking can be more fun by letting Haunt build the site whenever the source files are modified:
#+BEGIN_SRC sh
haunt serve -w
#+END_SRC
Now browse to http://localhost:8080/ and rejoice!
* License
The sources of this website are made available to you under the Affero General Public License, either version 3 of the license or (at your option) any later version.

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;; -*- geiser-scheme-implementation: guile -*-
;;; Bootstrappable.org website
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of the Bootstrappable.org website.
;;;
;;; The Bootstrappable.org website is free software; you can
;;; redistribute it and/or modify it under the terms of the Affero
;;; General Public License as published by the Free Software
;;; Foundation; either version 3 of the License, or (at your option)
;;; any later version.
;;;
;;; GuixSD website is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the Affero General Public
;;; License along with these source files. If not, see
;;; <http://www.gnu.org/licenses/>.
;; This is a build file for Haunt.
(use-modules (srfi srfi-1) ; list stuff
(srfi srfi-11) ; let-values
(srfi srfi-19) ; date functions
(srfi srfi-26) ; cut
(ice-9 ftw) ; file system
(ice-9 match) ; match-lambda
(haunt reader)
(haunt reader skribe)
(haunt site)
(haunt asset)
(haunt post) ;post-file-name
(haunt page)
(haunt html) ;sxml->html
(haunt utils) ;absolute-file-name
(haunt builder blog)
(haunt builder atom))
(define skribe-reader
(make-skribe-reader #:modules '((haunt skribe utils)
(haunt utils)
(skribe-utils))))
(define (drop-extension file-name)
(string-join
(drop-right (string-split file-name #\.) 1) ""))
(define (post/file-base-name post)
(drop-extension (basename (post-file-name post))))
(define* (read-page reader file-name layout target)
"Read a page object from FILE-NAME using READER and wrap it in LAYOUT."
(let-values (((metadata sxml) ((reader-proc reader) file-name)))
(make-page target
(layout #f (assoc-ref metadata 'title) sxml) ; site is #f
sxml->html)))
(define* (wrap-pages directory dest layout readers)
"Read all files in DIRECTORY, wrap them with the given LAYOUT and
place them in the directory DEST."
(define enter? (const #t))
;; remove "directory" from the front of "file-name", prepend "dest"
(define (leaf file-name stat memo)
(let* ((reader (find (cut reader-match? <> file-name) readers))
(base-length (length (file-name-components directory)))
(dest* (file-name-components dest))
(file-name* (file-name-components file-name))
(target (join-file-name-components
(append dest* (drop file-name* base-length))))
(target-name (string-append (drop-extension target) ".html")))
(if reader
(cons (read-page reader file-name default-layout target-name) memo)
(error "no reader available for page: " file-name))))
(define (noop file-name stat memo) memo)
(define (err file-name stat errno memo)
(error "layout processing failed with errno: " file-name errno))
(file-system-fold enter? leaf noop noop noop err '() directory))
(define* (latest-blog-post #:key theme)
"Return a builder procedure that copies the latest blog post to blog/latest.html."
(lambda (site posts)
(make-page "blog/latest.html"
((@@ (haunt builder blog) render-post)
theme
site
(first (posts/reverse-chronological posts)))
sxml->html)))
(define* (pin-blog-post file-name pinned-name #:key theme)
"Return a builder procedure that copies FILE-NAME as PINNED-NAME."
(lambda (site posts)
(make-page pinned-name
((@@ (haunt builder blog) render-post) theme site
(find (lambda (post)
(equal? (post-file-name post) file-name))
posts))
sxml->html)))
(define (date->string* date)
"Convert DATE to human readable string."
(date->string date "~B ~e, ~Y"))
(define (make-layout big-banner?)
(lambda (site title body)
`((doctype "html")
(head
(meta (@ (http-equiv "Content-Type") (content "text/html; charset=UTF-8")))
(meta (@ (http-equiv "Content-Language") (content "en")))
(meta (@ (name "author") (content "Ricardo Wurmus")))
(meta (@ (name "viewport") (content "width=device-width")))
(title ,(or title (if site (site-title site) "Bootstrappable --- towards trustable trust")))
(link (@ (rel "stylesheet")
(media "screen")
(type "text/css")
(href "/css/reset.css")))
(link (@ (rel "stylesheet")
(media "screen")
(type "text/css")
(href "/css/screen.css")))
(link (@ (rel "shortcut icon")
(href "http://bootstrappable.org/favicon.ico"))))
(body (@ (id "top"))
,(if big-banner?
'(div (@ (id "banner"))
(img (@ (alt "A boot pulled up by its straps.")
(src "/images/banner.svg"))))
`(begin
(div (@ (id "banner-slim"))
(a (@ (href "/"))
(img (@ (alt "A boot pulled up by its straps.")
(src "/images/banner-slim.svg")))))
(h1 ,title)))
(div (@ (id "page"))
,body)))))
(define default-layout (make-layout #f))
(define index-layout (make-layout #t))
(define bootstrappable-theme
(theme #:name "Bootstrappable"
#:layout default-layout
#:post-template ; TODO: should also take "site" for "site-post-slug"
(lambda (post)
;; TODO: similar version below for collection-template
(define (post-uri post)
(string-append "/blog/" (%make-slug post) ".html"))
`((h1 ,(post-ref post 'title))
(div (@ (class "time"))
(a (@ (href ,(post-uri post)))
,(date->string* (post-date post))))
(p (@ (class "back"))
(a (@ (href "/blog"))
"← other posts"))))
#:collection-template
(lambda* (site title posts prefix #:optional all-posts tag)
(define (post-uri post)
(string-append "/" (or prefix "") (site-post-slug site post) ".html"))
`((h1 ,title
,(if tag
`(a (@ (href ,(string-append "/feeds/tags/" tag ".xml")))
(img (@ (class "feed-icon")
(src "/images/feed.png")
(alt "subscribe to atom feed"))))
'()))
(ul (@ (class "archive"))
,@(map (lambda (post)
`(li
(a (@ (href ,(post-uri post)))
,(post-ref post 'title))))
posts))))))
;; needed for post template, because the site is not passed to the
;; layout function
(define %make-slug post/file-base-name)
(site #:title "Bootstrappable"
#:domain "http://bootstrappable.org/blog"
#:default-metadata
'((author . "Ricardo Wurmus")
(email . "rekado@elephly.net"))
#:make-slug %make-slug
#:readers (list skribe-reader html-reader)
#:builders (list (lambda _
(read-page skribe-reader
"index.skr"
index-layout
"index.html"))
(lambda (args . rest)
(wrap-pages "pages" "." default-layout
(list skribe-reader html-reader)))
(lambda _
(directory-assets "static" (const #t) "."))
(blog #:theme bootstrappable-theme
#:prefix "blog/")
(atom-feed)
(atom-feeds-by-tag)))

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(post :title "Bootstrappable builds"
(page
(p [To have trust in our computing platforms, we should be able to tell how each part was produced from source.
This would allow us to feel confident that the system is built on good foundations.])
(p [Compilers are often written in the language they are compiling.
This creates a chicken-and-egg problem that leads users and distributors to rely on opaque, pre-built binaries of those compilers that they use to build newer versions of the compiler.])
(p [We believe that opaque binaries are a threat to user security and user freedom since they are not auditable;
we believe the amount of bootstrap binaries should be minimized.])
(h2 [Motivation])
(p [If you are not yet convinced that having to trust unauditable binaries in your system is bad, you might find this
,(anchor "discussion of possible exploits and dangers" "motivation.html") interesting.])
(h2 [Benefits])
(p [This is nice, but what are the ,(em [actual]) benefits of “bootstrappable” implementations?
,(anchor "Find out what additional benefits" "benefits.html") there are to achieving bootstrappable builds.])
(h2 [Best practises])
(p [Are you developing or contributing to software that is affected by the bootstrapping problem?
Here we list ,(anchor "best practises and practical examples" "best-practises.html")
that can help you pull yourself up by your own bootstraps.])
(h2 [Collaboration projects])
(p [TODO: You know, long term stuff to work on collaboratively ... ,(anchor "Collaboration projects" "projects.html")])
(h2 [Who we are])
(p [TODO: Folks from the reproducible builds project, contacts from individual projects... ,(anchor "Who we are" "who.html")])))

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* Problems
- depending on binaries for building compilers and/or build systems is bad for trust
- the scale of the problem is getting larger as time passes: we started with just having GCC as a problem, but as time passed we got more and more new languages that are self-hosted (i.e. need an older version of themselves to be built).
- having a long chain of builds means that build systems have to be kept alive in modern environments.
- Go has its own linker, so to keep the bootstrap working patches have to be backported
- later versions of GCC are written in C++
- if you’re going to maintain an old version GCC just for a bootstrap chain you’ll have to backport new architectures. This means that our bootstrap chain is forever tied to x86 (PowerPPC users cannot bootstrap on their own).
- generated C code is not source — it may make portability possible, but it’s not trustworthy
- bootstrapping is not a *functional* feature, so the value isn’t immediately obvious (very much like reproducible builds)
- the whole toolchain has bootstrapping issues (including linker and kernel…)
* Ideas
** Consensus
- languages with multiple implementations are great, because diversity makes bootstrapping easier. For single-implementation languages we need alternative ways to get started (even if it’s inefficient)
** Rather than depend on more binary blobs, throw more CPU time at it, e.g. by emulating an x86 CPU with qemu and then work from there.
** Need to reach out to compiler developers: make sure that there’s a non-self-hosted path to build the first compiler — find cooperative people in compiler projects to “bootstrap” a bootstrapping project
** try to depend only on the smallest C compiler possible
- e.g. [[http://www.landley.net/code/tinycc/][tinycc]], [[http://pcc.ludd.ltu.se/][pcc]], [[http://www.landley.net/qcc/][qcc]]
- coreboot folks have a simple C compiler RAMCC(?)
** register http://bootstrappable.org, collect stories there!
*** motivation: collect examples of backdoored compilers
- toy example: https://manishearth.github.io/blog/2016/12/02/reflections-on-rusting-trust/
- ken thompson: reflections on trusting trust
- "Defending Against Compiler-Based Backdoors"
http://blog.regehr.org/archives/1241
- PoC||GTFO
https://www.alchemistowl.org/pocorgtfo/pocorgtfo08.pdf
- TODO: need more!
*** Examples
- e.g. the bootstrap chain for GCC –> GCJ –> IcedTea 6 –> IcedTea7 in Guix
- GNU Make doesn’t need make but just a bash script
- Cook
- Guile Scheme: includes an interpreter written in C.
- Bazel needs Bazel to build itself, *but* you can build a minimal variant of Bazel with a shell script that runs =javac= on all Java sources, etc
- Ant, needs itself but can be build with plain Java
*** best practises
- don’t throw old code away (to allow for a bootstrapping chain)
- have an alternative implementation backend (e.g. written in C or in a language that traces back to C eventually) — simplifies porting
*** Call for Action!
- target it to different audiences: “if you’re a compiler writer, do this…”, “if you’re a free software dev, consider …”
* Notes for the manifesto
- Don't give "bad" examples, since we don't want to piss off upstreams. Only give "good" examples.
* Homepage / overview of problem
(short summary from the problem - 2-3 concise sentences based on the Problems section?)
(try to clarify what bootstrapping actually is)
To have trust in our computing platforms, we should be able to follow the
bootstrapping process - how each part was produced from source - to then feel
confident it is built on good foundations.
(more detail on the intended outcomes and benefits)
(1. trust/security - most powerful/appealing motivation, mention this one first)
We want to draw attention to the need for an auditable, repeatable process for
bootstrapping programming languages, compilers, pieces of the toolchain and whole
distributions.
(2. easier porting (new platforms? languages?) - secondary benefit, important but less people are interested)
Another benefit would be that it becomes easier to port these things to new hardware
platforms.
(Motivation / benefits could become a separate section of it gets too big)
Compilers are often written in the language they are compiling.
This creates a chicken-and-egg problem that leads users and
distributors to rely on opaque, pre-built binaries of those
compilers that they use to build newer versions of the compiler.
We believe that those opaque binaries are a threat to user
security and user freedom since they are not auditable; we believe
the amount of bootstrap binaries should be minimized.
* Best Practices (incl. examples, success stories?)
** For compiler writers...
If you're working on a compiler that is written in a language other than
the one it's compiling, you're all set!
If your compiler is written in the language that it's compiling
(“self-hosted”), it probably falls in one of the following categories.
If other implementations of this programming language exist, please make
sure your compiler can be built with one of these. Examples include:
- The Go programming language has two implementations: [[https://golang.org/][the reference
implementation]] is self-hosted, and that in [[https://gcc.gnu.org][GCC]] is written in C++.
(TODO: check if we can build one with the other) Furthermore,
version 1.4 of the reference implementation was written in a
different language and can be used to build version 1.5.
- Common Lisp has several implementations. Notably [[http://www.clisp.org/][GNU clisp]] is
written and C and can be used to build self-hosted implementations
such as [[http://www.sbcl.org/][SBCL]].
If your compiler targets a language for which no other implementation
exists, then please consider maintaining a (minimal) implementation of
the language written in a different language. Most likely this
implementation exists, or existed at the point the programming language
was created. Maintaining this alternate implementation has a cost;
however, this cost should be minimal if this alternate implementation is
used routinely to build the compiler, and if this implementation is kept
simple—it does not need to be optimized.
Examples include:
- [[https://gnu.org/software/guile][GNU Guile]], a Scheme implementation with a self-hosted compiler,
relies on an [[http://git.savannah.gnu.org/cgit/guile.git/tree/libguile/eval.c][Scheme interpreter written in C]] for bootstrapping
purposes.
Please let us know if you’d like to add your compiler to this list!
** For build systems writers...
Build systems sometimes have chicken-and-egg problems: they may
need a version of themselves to get built. If you are developing
a build system, this can be avoided. We recommend that you
provide an alternative way to build your build system.
Examples include:
- [[https://gnu.org/software/make][GNU Make]] does not require a ‘make’ implementation. It can be built
using a [[http://git.savannah.gnu.org/cgit/make.git/tree/build.template][shell script]].
- [[http://ant.apache.org/][Apache Ant]] can bootstrap with a [[https://git-wip-us.apache.org/repos/asf?p=ant.git;a=blob;f=bootstrap.sh;h=60b6ece03ce78716bc036a44226f4934b541f326;hb=HEAD][shell script]]
that only relies on the Java compiler.
- [[https://bazel.build/][Bazel]] does not require Bazel to build itself but
can be boostrapped with a [[https://github.com/bazelbuild/bazel/blob/master/compile.sh][shell script]].
- [[https://buckbuild.com/][Buck]] does not require Buck to build itself. Instead, it can be
built using [[https://github.com/facebook/buck/blob/master/build.xml][Ant]].
Build system, compared to compiler, do not need to write a full
language compiler of its language to bootstrap. A really slow and
unefficient build written in shell script or another older
build system (Ant, GNU Make) can generate a minimal version of the
build system to bootstrap a complete version of it.
** For distros
It is unavoidable that distributions use some binaries as part of
their bootstrap chain. However, distributions should endeavour to
provide traceacibility and automated reproducibility for such
binaries. This means that:
- It should be clear where the binary came from and how it was
produced.
- Users can reproduce the binary to verify that it has not been
tampered with.
For example, a distribution might use a binary package of GCC to build
GCC from source. This bootstrap binary is in most cases built from a
previous revision of the distribution's GCC package. Thus, the
distribution can label the binary with something like "this package
was built by running <command> on revision <hash> of the
distribution's package repository." A user can then easily reproduce
the binary by fetching the specified sources and running the specified
command. This build will in most cases depend on a previous generation
of bootstrap binaries. Thus, we get a chain of verifiable bootstrap
binaries stretching back in time.
Bootstrap binaries may also come from upstream. This would typically
be the case when a language is first added to a distribution. In this
case, it may not be obvious how the binary can be reproduced, but the
distribution should at least clearly label the provenance of the
binary, e.g. "this binary was downloaded from
https://upstream-compiler.example.org/upstream-compiler-20161211-x86_64-linux.tar.xz".
TODO: provide an example of how we do this / are going to do this in
Nixpkgs / Guix / ...?
http://git.savannah.gnu.org/cgit/guix.git/commit/?id=062134985802d85066418f6ee2f327122166a567
* Collaboration projects
** Continued maintenance of the GNU Compiler for Java (GCJ)
Until recently the latest Java Development Kit (JDK) could be
bootstrapped in a chain starting with GCJ (the GNU Compiler for Java)
and the IcedTea build system. GCJ was deleted from the GNU Compiler
Collection in October 2016, so it is now unclear how to bootstrap the
JDK in future. To ensure that the JDK can be built from sources
without the need for an existing installation of the OpenJDK we
propose to continue maintaining GCJ.
** Collectively maintaining GCC 4.7
The C and C++ compilers of the GNU Compiler Collection make up the
foundation of many free software distributions. Current versions of
GCC are written in C++, which means that a C++ compiler is needed to
build it from source. GCC 4.7 was the last version of the collection
that could be built with a plain C compiler, a much simpler task. We
propose to collectively maintain a subset of GCC 4.7 to ensure that we
can build the foundation of free software distributions starting with
a simple C compiler (such as tinyCC, pcc, etc).
* Who are we? Which projects are participating
* Buy-in
This is nice, but what are the actual benefits of “bootstrappable”
implementations?
** For users
As a user, bootstrappable implementations, together with [[https://reproducible-builds.org][reproducible
builds]], provide confidence that you are running the code you expect to
be running. Its source code is auditable by the developer community,
which in turns provides reassurance that the code you’re running does
not have backdoors.
** For distributors
Bootstrappable implementations provide clear provenance tracking: the
dependency graph of your distribution packages shows how each binary was
obtained.
** For developers
If you are a compiler writer, making your compiler bootstrappable from a
different language will simplify the development process (no need to
carry large pre-built binaries around). It will also make it easier to
port the compiler to a different platform for which no bootstrap
binaries exist yet.
* Next Steps
Try building gcc using gcc-4.7 <-- this already works (we used GCC 4.7 some months ago in Guix, but updated later for unrelated reasons)
Try building GCC 4.7 with TinyCC

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(post :title "Benefits"
(page
(p [This is nice, but what are the actual benefits of “bootstrappable” implementations?])
(h2 [For users])
(p [As a user, bootstrappable implementations, together with ,(anchor "reproducible builds" "https://reproducible-builds.org"), provide confidence that you are running the code you expect to be running.
Its source code is auditable by the developer community, which in turns provides reassurance that the code you’re running does not have backdoors.])
(h2 [For distributors])
(p [Bootstrappable implementations provide clear provenance tracking:
the dependency graph of your distribution packages shows how each binary was obtained.])
(h2 [For developers])
(p [If you are a compiler writer, making your compiler bootstrappable from a different language will simplify the development process (no need to carry large pre-built binaries around).
It will also make it easier to port the compiler to a different platform for which no bootstrap binaries exist yet.])))

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(post :title "Best practises"
(page
(p [Are you developing or contributing to software that is affected by the bootstrapping problem?
The following sections list best practises and practical examples that can help you pull yourself up by your own bootstraps,
no matter if you are ,(anchor "a compiler writer" "#compiler"),
,(anchor "a build system developer" "#build-system"),
or ,(anchor "a system distribution developer" "#distro").])
`(div (@ (id "compiler")))
(h2 [For compiler writers])
(p [If you're working on a compiler that is written in a language other than the one it's compiling, you're all set!])
(p [If your compiler is written in the language that it's compiling (“self-hosted”), it probably falls in one of the following categories.])
(h3 [When an alternative implementation exists])
(p [If other implementations of this programming language exist, please make sure your compiler can be built with one of these.
Examples include:])
(ul (li [The Go programming language has two implementations:
,(anchor "the reference implementation" "https://golang.org/") is self-hosted, and that in ,(anchor "GCC" "https://gcc.gnu.org") is written in C++.
Furthermore, version 1.4 of the reference implementation was written in a different language and can be used to build version 1.5.])
(li [Common Lisp has several implementations.
Notably ,(anchor "GNU clisp" "http://www.clisp.org/") is written and C and can be used to build self-hosted implementations such as ,(anchor "SBCL" "http://www.sbcl.org/").]))
(h3 [When there is only one implementation])
(p [If your compiler targets a language for which no other implementation exists, then please consider maintaining a (minimal) implementation of the language written in a different language.
Most likely this implementation exists, or existed at the point the programming language was created.
Maintaining this alternate implementation has a cost;
however, this cost should be minimal if this alternate implementation is used routinely to build the compiler, and if this implementation is kept simple—it does not need to be optimized.])
(p [Examples include:])
(ul (li [,(anchor "GNU Guile" "https://gnu.org/software/guile"),
a Scheme implementation with a self-hosted compiler,
relies on a ,(anchor "Scheme interpreter written in C" "http://git.savannah.gnu.org/cgit/guile.git/tree/libguile/eval.c") for bootstrapping purposes.]))
(p [Please let us know if you’d like to add your compiler to this list!])
`(div (@ (id "build-system")))
(h2 [For build systems writers])
(p [Build systems sometimes have chicken-and-egg problems: they may need a version of themselves to get built.
If you are developing a build system, this can be avoided.
We recommend that you provide an alternative way to build your build system.])
(p [Examples include:])
(ul (li [,(anchor "GNU Make" "https://gnu.org/software/make") does not require a (code "make") implementation.
It can be built using a ,(anchor "shell script" "http://git.savannah.gnu.org/cgit/make.git/tree/build.template").])
(li [,(anchor "Apache Ant" "http://ant.apache.org/") can bootstrap with a ,(anchor "shell script" "https://git-wip-us.apache.org/repos/asf?p=ant.git;a=blob;f=bootstrap.sh;h=60b6ece03ce78716bc036a44226f4934b541f326;hb=HEAD") that only relies on the Java compiler.])
(li [,(anchor "Bazel" "https://bazel.build/") does not require Bazel to build itself but can be boostrapped with a ,(anchor "shell script" "https://github.com/bazelbuild/bazel/blob/master/compile.sh").])
(li [,(anchor "Buck" "https://buckbuild.com/") does not require Buck to build itself.
Instead, it can be built using ,(anchor "Ant" "https://github.com/facebook/buck/blob/master/build.xml").]))
(p [Build systems are generally easier to safely bootstrap than a self-hosted compiler that may need a full language compiler of its language.
A slow and inefficient build written in shell scripts or a different older build system (Ant, GNU Make) may suffice to generate a minimal version of the build system to bootstrap a complete version of it.])
`(div (@ (id "distro")))
(h2 [For distros])
(p [It is unavoidable that distributions use some binaries as part of their bootstrap chain.
However, distributions should endeavour to provide traceacibility and automated reproducibility for such binaries.
This means that:])
(ul (li [It should be clear where the binary came from and how it was produced.])
(li [Users can reproduce the binary to verify that it has not been tampered with.]))
(p [For example, a distribution might use a binary package of GCC to build GCC from source.
This bootstrap binary is in most cases built from a previous revision of the distribution's GCC package.
Thus, the distribution can label the binary with something like "this package was built by running <command> on revision <hash> of the distribution's package repository."
A user can then easily reproduce the binary by fetching the specified sources and running the specified command.
This build will in most cases depend on a previous generation of bootstrap binaries.
Thus, we get a chain of verifiable bootstrap binaries stretching back in time.])
(p [Bootstrap binaries may also come from upstream.
This would typically be the case when a language is first added to a distribution.
In this case, it may not be obvious how the binary can be reproduced, but the distribution should at least clearly label the provenance of the binary, e.g. ,(em "this binary was downloaded from https://upstream-compiler.example.org/upstream-compiler-20161211-x86_64-linux.tar.xz").]))
;;TODO: provide an example of how we do this / are going to do this in
;; Nixpkgs / Guix / ...?
;;http://git.savannah.gnu.org/cgit/guix.git/commit/?id=062134985802d85066418f6ee2f327122166a567
)

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(post :title "Motivation"
(page
(p [WIP: needs enticing prose!])
(ul (li [ken thompson: reflections on trusting trust])
(li [,(anchor "toy example"
"https://manishearth.github.io/blog/2016/12/02/reflections-on-rusting-trust/")])
(li [,(anchor "Defending Against Compiler-Based Backdoors"
"http://blog.regehr.org/archives/1241")])
(li [,(anchor "PoC||GTFO"
"https://www.alchemistowl.org/pocorgtfo/pocorgtfo08.pdf")]))))

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(post :title "Collaboration projects"
(page
(p [Here are a couple of projects that cannot possibly be done by just a single motivated individual.
If you're interested in working on any of these projects please ,(anchor "contact us" "/who.html").])
(h2 [Continued maintenance of the GNU Compiler for Java (GCJ)])
(p [Until recently the latest Java Development Kit (JDK) could be bootstrapped in a chain starting with GCJ (the GNU Compiler for Java) and the IcedTea build system.
GCJ was deleted from the GNU Compiler Collection in October 2016, so it is now unclear how to bootstrap the JDK in future.
To ensure that the JDK can be built from sources without the need for an existing installation of the OpenJDK we propose to continue maintaining GCJ.])
(h2 [Collectively maintaining GCC 4.7])
(p [The C and C++ compilers of the GNU Compiler Collection make up the foundation of many free software distributions.
Current versions of GCC are written in C++, which means that a C++ compiler is needed to build it from source.
GCC 4.7 was the last version of the collection that could be built with a plain C compiler, a much simpler task.
We propose to collectively maintain a subset of GCC 4.7 to ensure that we can build the foundation of free software distributions starting with a simple C compiler (such as tinyCC, pcc, etc).])))

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(post :title "Who we are"
(page "TODO"))

66
skribe-utils.scm Normal file
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(define-module (skribe-utils)
#:use-module (ice-9 match) ; match-lambda
#:use-module (srfi srfi-1) ; list stuff
#:export (email
~
---
page
div
table
figure
wide-img))
(define (div class . contents)
`(div (@ (class ,class)) ,@contents))
(define (page . contents)
`(div (@ (class "page")) ,@contents))
(define (email address)
"Obfuscate a given email ADDRESS."
`(span (@ (class "obfuscated"))
,(string-map (lambda (c) (integer->char (+ 1 (char->integer c))))
address)))
(define (~)
"Non-breaking space."
(string #\240))
(define (---)
"Em dash." "—")
(define* (table #:key (align '()) headers rows)
"Build HTML tables more easily."
(let ((alignment (append align
(make-list (- (length headers)
(length align))
"left"))))
(define (make-row fields)
`(tr ,(map (match-lambda
((field alignment)
`(td (@ (align ,alignment)) ,field)))
(zip fields alignment))))
(define (make-header fields)
`(tr (@ (class "header"))
,(map (match-lambda
((field alignment)
`(th (@ (align ,alignment)) ,field)))
(zip fields alignment))))
`(table
(thead ,(make-header headers))
(tbody ,(map make-row rows)))))
(define (figure file caption)
`(div (@ (class "figure"))
(img (@ (src ,(if (string-prefix? "/" file)
file
(string-append "/images/posts/" file)))
(alt ,caption)))
(p (@ (class "caption")) ,caption)))
(define (wide-img file alt)
`(img (@ (class "full stretch")
(src ,(if (string-prefix? "/" file)
file
(string-append "/images/posts/" file)))
(alt ,alt))))

BIN
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/* http://meyerweb.com/eric/tools/css/reset/
v2.0b1 | 201101
NOTE: WORK IN PROGRESS
USE WITH CAUTION AND TEST WITH ABANDON */
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure,
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video {
margin: 0;
padding: 0;
border: 0;
outline: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
display: block;
}
body {
line-height: 1;
}
ol, ul {
list-style: none;
}
blockquote, q {
quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
content: '';
content: none;
}
/* remember to define visible focus styles!
:focus {
outline: ?????;
} */
/* remember to highlight inserts somehow! */
ins {
text-decoration: none;
}
del {
text-decoration: line-through;
}
table {
border-collapse: collapse;
border-spacing: 0;
}

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@font-face {
font-family: 'droid_serifregular';
src: url('DroidSerif-webfont.woff') format('woff');
font-weight: normal;
font-style: normal;
}
@font-face {
font-family: 'linbiolinum';
src: url('linbiolinum_rah-webfont.woff2') format('woff2'),
url('linbiolinum_rah-webfont.woff') format('woff');
font-weight: normal;
font-style: normal;
}
html, body {
font-family: "droid_serifregular", serif;
text-rendering: optimizelegibility;
-moz-font-feature-settings: "liga";
line-height: 140%;
color: #333;
background: #fcfbf3; }
@media all {html {font-size: 24px;}}
@media all and (max-width:1000px){html {font-size: 24px;}}
@media all and (max-width:960px){html {font-size: 23px;}}
@media all and (max-width:920px){html {font-size: 22px;}}
@media all and (max-width:880px){html {font-size: 21px;}}
@media all and (max-width:840px){html {font-size: 20px;}}
@media all and (max-width:800px){html {font-size: 19px;}}
@media all and (max-width:760px){html {font-size: 18px;}}
body {
margin: 0 auto; }
body .elephly {
background: #bdc0ac; }
#index {
padding: 1rem;
margin-left: 2rem; }
#banner-slim, #banner {
margin-left: auto;
margin-right: auto;
margin-top: 0;
margin-bottom: 1em;
padding-top: 1em;
width: 100%;
box-shadow: 0px 3px 8px #ccc;
background: #fff;
text-align: center; }
#banner-slim {
padding-bottom: 1em; }
div.boxes {
text-align: center;
padding-left: 1em;
padding-right: 1em; }
div.box {
font-size: 0.8em;
text-align: left;
display: inline-block;
background: #fff;
border-radius: 15px;
box-shadow: 0px 3px 8px #ccc;
border: 3px #aaa;
padding: 1em;
margin: 20px;
max-width: 400px;
min-width: 300px;
vertical-align: top; }
@media screen and (max-width: 600px) {
#index {
text-align: center; }}
/* drop caps */
#page p:first-child:first-letter {
font-size: 5em;
float: left;
color: #ff00ff;
line-height: 60px;
padding-top: 4px;
padding-right: 8px;
padding-left: 3px;
}
#page ul {
list-style: square outside;
margin-top: 0.5rem;
margin-bottom: 0.5rem; }
div.time {
color: #9ba0a7;
margin-top: -2.8rem;
margin-bottom: 2.5rem;
font-size: 0.9rem;
font-weight: normal; }
div.figure {
text-align: center;
background: #fff;
box-sizing: border-box;
box-shadow: 0 0 0.4em 0 #888;
margin: 1rem;
padding: 1rem; }
@media screen and (min-width: 600px) {
div.figure {
float: right; }}
@media screen and (max-width: 600px) {
div.figure {
float: none;
clear: both; }}
div#page div.figure p.caption {
width: auto;
text-align: center;
font-size: 0.8rem; }
div.footnotes {
margin-top: 1rem;
padding-top: 1rem;
border-top: 1px dotted #aaaaaa; }
h1 {
color: #000;
clear: both;
line-height: 125%;
text-align: center;
margin-top: 1.3rem;
margin-bottom: 1.3rem;
display: block;
font-family: "droid sans", sans-serif;
letter-spacing: -0.03em;
font-size: 2.2rem;
font-weight: 400; }
@media screen and (max-width: 600px) {
h1:first-child {
margin-top: 1rem; }}
* + h2 {
margin-top: 1.8rem; }
* + h3 {
margin-top: 1.5rem; }
h2, h3 {
color: #333;
margin-bottom: 0.5em;
clear: both;
letter-spacing: -0.02em;
font-size: 1.2rem;
font-weight: 300;
font-family: "Droid Sans", Arial, sans-serif; }
h2 {
text-align: center;
padding-bottom: 0.3em;
border-bottom: 2px solid #ff00ff; }
h3 {
font-size: 1.2rem; }
a {
color: #389;
text-decoration: none; }
a:visited {
color: #167; }
a:hover {
color: #000;
background: #eeede5; }
strong {
font-weight: bold; }
div.page {
overflow: visible;
max-width: 32rem;
padding-left: 2rem;
margin-right: 1rem;
margin-bottom: 1rem; }
@media only screen and (min-width: 600px) {
div.page {
margin-left: 4rem;
margin-right: 4rem; }}
@media only screen and (min-width: 1024px) {
div.page {
margin-left: auto;
margin-right: auto; }}
div.page ul {
max-width: 32rem; }
div.page p {
margin-bottom: 0;
text-align: justify;
max-width: 32rem; }
div.page p img, div#page p video {
display: inline;
float: right;
margin-left: 0.8rem;
-moz-border-radius: 15px;
border-radius: 15px; }
div.page p.back {
margin-top: 1.5rem;
width: 50%; }
div.page blockquote {
margin-left: 3rem;
margin-right: 3rem;
margin-top: 1rem;
margin-bottom: 1rem;
font-size: 0.9rem;
font-style: italic; }
div.page img.full {
width: 100%;
margin-top: 0.5rem;
margin-bottom: 1rem;
margin-left: 0;
margin-right: 0;
position: static;
float: none;
clear: both;
padding: 0;
display: block;
-moz-border-radius: 15px;
border-radius: 15px; }
div.page img.stretch {
width: 100%; }
div.page div.fineprint {
font-size: .7rem;
text-indent: 0;
line-height: 1rem;
margin-top: 1rem;
padding-top: 1rem;
border-top: 1px dotted #aaaaaa;
width: 100%;
color: #666;
clear: both;
display: block; }
div.page div.fineprint div.license {
display: block;
clear: both; }
div.page div.fineprint img {
display: block;
float: left;
margin-right: .5rem; }
p + p, div.figure + p {
text-indent: .5rem;
margin-top: 0.4rem; }
warning {
clear: both;
margin: 1rem;
padding: 1rem;
background: #ffffaa;
border: 2px dashed #dddd88;
border-radius: 3px;
display: block; }
pre {
margin: 1rem;
padding: 1rem;
display: inline-block;
border-radius: 3px;
background: #444; }
pre.lyrics {
margin: 0;
padding: 0rem;
background: transparent; }
pre code {
color: #aaff00;
background: transparent; }
img.flickr {
position: relative;
display: block;
margin: 0 auto;
width: 100%; }
img.undecorated {
margin: 0;
padding: 0; }
img.headline {
margin: 0;
margin-right: 1rem;
padding: 0;
vertical-align: text-bottom; }
img.feed-icon {
vertical-align: middle;
padding-left: 0.2rem; }
div#columns {
overflow: hidden;
margin-bottom: 1rem; }
div#columns ul {
list-style: none outside none;
margin: 0;
float: left;
width: 50%; }
span.code, code {
font-family: "Envy Code R", "Inconsolata", "Consolas", "Courier New", monospace;
color: #111;
background: #dedede; }
span.code {
font-size: 0.85rem;
border-bottom: #888;
padding: .15rem; }
br {
clear: left; }
em {
font-style: italic; }
.item + .item {
margin-top: 1rem; }
ul.list {
list-style-type: square; }
ul.list li {
margin-bottom: .4rem; }
ul.list li .description {
font-size: .8rem; }
div.download {
float: left;
width: 45%;
margin-right: 1rem;
margin-bottom: 1.5rem; }
div.download a {
display: block;
width: 100%;
text-align: center;
padding: 0.5em 0;
font-family: sans-serif;
background: #fff;
color: #888;
border-radius: 2rem;
-moz-border-radius: 2rem; }
div.download a:hover {
background: #888;
color: #fff; }
div.download table {
font-size: .8rem;
line-height: 1rem;
border-collapse: collapse;
margin-bottom: 1rem;
clear: both; }
div.download table th {
color: #999;
font-weight: 400;
padding-right: 1rem;
border-right: 1px solid #ffaa00;
text-align: right; }
div.download table td {
color: #777;
margin: 0;
padding: 0;
padding-left: 1rem;
text-align: left; }
table {
font-size: 0.9rem;
margin-top: 0.5rem;
margin-bottom: 0.5rem; }
table thead {
border-bottom: 2px solid #ffaa00; }
table thead tr.header {
font-weight: bold; }
table tr.odd {
background-color: #fafafa; }
table th + th, table td + td {
padding-left: 1rem; }
h1.year {
border-bottom: 4px solid #eeede5;
width: 50%; }
h2.month {
font-weight: normal; }
ul.archive {
margin-left: 1rem; }
ul.tags {
list-style: none;
margin-left: 1rem; }
ul.tags li {
margin-right: 1rem;
white-space: nowrap;
display: inline-block; }
#page ul.tree {
margin: 1rem;
font-family: monospace;
display: block;
list-style: none; }
#page ul.tree li { line-height: 1.3rem; }
#page ul.tree .NORM { color: black; background-color: transparent;}
#page ul.tree .FIFO { color: purple; background-color: transparent;}
#page ul.tree .CHAR { color: yellow; background-color: transparent;}
#page ul.tree .DIR { color: blue; background-color: transparent;}
#page ul.tree .BLOCK { color: yellow; background-color: transparent;}
#page ul.tree .LINK { color: aqua; background-color: transparent;}
#page ul.tree .SOCK { color: fuchsia;background-color: transparent;}
#page ul.tree .EXEC { color: green; background-color: transparent;}
#comments {
margin-top: 1rem;
font-size: 0.7rem;
padding: 0 1em 1rem;
border-top: 5px solid #999999;
}
/* DISQUS */
h1.disqus {
margin-top: 1rem;
float: left; }
div#disqus_thread {
border-top: 5px solid #999999;
padding: 0 1em 1rem;
background: #eeede5;
margin-top: 1rem;
-moz-border-radius: 0 0 15px 15px;
border-radius: 0 0 15px 15px;
font-size: 14px; }
div#disqus_thread ul {
width: auto; }
div#disqus_thread #dsq-global-toolbar {
margin: 0.5em 0; }
div#disqus_thread #dsq-reply {
margin-top: 0.5rem; }
div#disqus_thread h3 {
clear: none; }

263
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