gitian: Add OSX build descriptors

Github-Pull: #4185
Rebased-By: Wladimir J. van der Laan
Rebased-From: bb5da27, 2288206, 7fe8fe6, f76db78, ebcf375, fa1ed7c, 397e9b8

2 files changed, 103 insertions, 17 deletions

diff --git a/doc/README_osx.txt b/doc/README_osx.txt
new file mode 100644
index 0000000000..6eae4f5cf1
--- /dev/null
+++ b/doc/README_osx.txt
@@ -0,0 +1,71 @@
+Deterministic OSX Dmg Notes.
+
+Working OSX DMG's are created in Linux by combining a recent clang,
+the Apple's binutils (ld, ar, etc), and DMG authoring tools.
+
+Apple uses clang extensively for development and has upstreamed the necessary
+functionality so that a vanilla clang can take advantage. It supports the use
+of -F, -target, -mmacosx-version-min, and --sysroot, which are all necessary
+when building for OSX. A pre-compiled version of 3.2 is used because it was not
+available in the Precise repositories at the time this work was started. In the
+future, it can be switched to use system packages instead.
+
+Apple's version of binutils (called cctools) contains lots of functionality
+missing in the FSF's binutils. In addition to extra linker options for
+frameworks and sysroots, several other tools are needed as well such as
+install_name_tool, lipo, and nmedit. These do not build under linux, so they
+have been patched to do so. The work here was used as a starting point:
+https://github.com/mingwandroid/toolchain4
+
+In order to build a working toolchain, the following source packages are needed
+from Apple: cctools, dyld, and ld64.
+
+Beware. This part is ugly. Very very very ugly. In the future, this should be
+broken out into a new repository and cleaned up. Additionally, the binaries
+only work when built as x86 and not x86_64. This is an especially nasty
+limitation because it must be linked with the toolchain's libLTO.so, meaning
+that the entire toolchain must be x86. Gitian x86_64 should not be used until
+this has been fixed, because it would mean that several native dependencies
+(openssl, libuuid, etc) would need to be built as x86 first.
+
+These tools inject timestamps by default, which produce non-deterministic
+binaries. The ZERO_AR_DATE environment variable is used to disable that.
+
+This version of cctools has been patched to use the current version of clang's
+headers and and its libLTO.so rather than those from llvmgcc, as it was
+originally done in toolchain4.
+
+To complicate things further, all builds must target an Apple SDK. These SDKs
+are free to download, but not redistributable.
+To obtain it, register for a developer account, then download xcode_3.2.6_and_ios_sdk_4.3.dmg:
+https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/xcode_3.2.6_and_ios_sdk_4.3__final/xcode_3.2.6_and_ios_sdk_4.3.dmg
+This file is several gigabytes in size, but only a single .pkg file inside is
+needed (MacOSX10.6.pkg). From Linux, 7-zip can be used to extract this file.
+The DMG can then be discarded.
+
+The gitian descriptors build 2 sets of files: Linux tools, then Apple binaries
+which are created using these tools. The build process has been designed to
+avoid including the SDK's files in Gitian's outputs. All interim tarballs are
+fully deterministic and may be freely redistributed.
+
+genisoimage is used to create the initial DMG. It is not deterministic as-is,
+so it has been patched. A system genisoimage will work fine, but it will not
+be deterministic because the file-order will change between invocations.
+The patch can be seen here:
+https://raw.githubusercontent.com/theuni/osx-cross-depends/master/patches/cdrtools/genisoimage.diff
+No effort was made to fix this cleanly, so it likely leaks memory badly. But
+it's only used for a single invocation, so that's no real concern.
+
+genisoimage cannot compress DMGs, so afterwards, the 'dmg' tool from the
+libdmg-hfsplus project is used to compress it. There are several bugs in this
+tool and its maintainer has seemingly abandoned the project. It has been forked
+and is available (with fixes) here: https://github.com/theuni/libdmg-hfsplus .
+
+The 'dmg' tool has the ability to create DMG's from scratch as well, but this
+functionality is broken. Only the compression feature is currently used.
+Ideally, the creation could be fixed and genisoimage would no longer be necessary.
+
+Background images and other features can be added to DMG files by inserting a
+.DS_Store before creation. The easiest way to create this file is to build a
+DMG without one, move it to a device running OSX, customize the layout, then
+grab the .DS_Store file for later use. That is the approach taken here.
diff --git a/doc/release-process.md b/doc/release-process.md
index b93c163748..be00cb8092 100644
--- a/doc/release-process.md
+++ b/doc/release-process.md
@@ -33,10 +33,18 @@ Release Process
 	git checkout v${VERSION}
 	popd
 	pushd ./gitian-builder
+        mkdir -p inputs; cd inputs/
+
+ Register and download the Apple SDK (see OSX Readme for details)
+        visit https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/xcode_3.2.6_and_ios_sdk_4.3__final/xcode_3.2.6_and_ios_sdk_4.3.dmg
+ 
+ Extract MacOSX10.6.pkg using 7zip
+        7z e -y xcode_3.2.6_and_ios_sdk_4.3.dmg 5.hfs
+        7z -y e 5.hfs "Xcode and iOS SDK/Packages/MacOSX10.6.pkg"
+        rm 5.hfs
 
  Fetch and build inputs: (first time, or when dependency versions change)
 
-	mkdir -p inputs; cd inputs/
 	wget 'http://miniupnp.free.fr/files/download.php?file=miniupnpc-1.9.tar.gz' -O miniupnpc-1.9.tar.gz
 	wget 'https://www.openssl.org/source/openssl-1.0.1g.tar.gz'
 	wget 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz'
@@ -49,6 +57,16 @@ Release Process
 	wget 'https://download.qt-project.org/official_releases/qt/5.2/5.2.0/single/qt-everywhere-opensource-src-5.2.0.tar.gz'
 	wget 'https://download.qt-project.org/archive/qt/4.6/qt-everywhere-opensource-src-4.6.4.tar.gz'
 	wget 'https://protobuf.googlecode.com/files/protobuf-2.5.0.tar.bz2'
+	wget 'https://github.com/mingwandroid/toolchain4/archive/10cc648683617cca8bcbeae507888099b41b530c.tar.gz'
+	wget 'http://www.opensource.apple.com/tarballs/cctools/cctools-809.tar.gz'
+	wget 'http://www.opensource.apple.com/tarballs/dyld/dyld-195.5.tar.gz'
+	wget 'http://www.opensource.apple.com/tarballs/ld64/ld64-127.2.tar.gz'
+	wget 'http://cdrkit.org/releases/cdrkit-1.1.11.tar.gz'
+	wget 'https://github.com/theuni/libdmg-hfsplus/archive/libdmg-hfsplus-v0.1.tar.gz'
+	wget 'http://llvm.org/releases/3.2/clang+llvm-3.2-x86-linux-ubuntu-12.04.tar.gz' -O \
+	     clang-llvm-3.2-x86-linux-ubuntu-12.04.tar.gz
+        wget 'https://raw.githubusercontent.com/theuni/osx-cross-depends/master/patches/cdrtools/genisoimage.diff' -O \
+	     cdrkit-deterministic.patch
 	cd ..
 	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/boost-linux.yml
 	mv build/out/boost-*.zip inputs/
@@ -64,6 +82,12 @@ Release Process
 	mv build/out/qt-*.zip inputs/
 	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/protobuf-win.yml
 	mv build/out/protobuf-*.zip inputs/
+	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/gitian-osx-native.yml
+	mv build/out/osx-*.tar.gz inputs/
+	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/gitian-osx-depends.yml
+	mv build/out/osx-*.tar.gz inputs/
+	./bin/gbuild ../bitcoin/contrib/gitian-descriptors/gitian-osx-qt.yml
+	mv build/out/osx-*.tar.gz inputs/
 
  The expected SHA256 hashes of the intermediate inputs are:
 
@@ -96,13 +120,19 @@ Release Process
 	zip -r bitcoin-${VERSION}-win-gitian.zip *
 	mv bitcoin-${VERSION}-win-gitian.zip ../../../
 	popd
+        ./bin/gbuild --commit bitcoin=v${VERSION} ../bitcoin/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
+        ./bin/gsign --signer $SIGNER --release ${VERSION}-osx --destination ../gitian.sigs/ ../bitcoin/contrib/gitian-descriptors/gitian-osx-bitcoin.yml
+	pushd build/out
+	mv Bitcoin-Qt.dmg ../../../
+	popd
 	popd
 
   Build output expected:
 
   1. linux 32-bit and 64-bit binaries + source (bitcoin-${VERSION}-linux-gitian.zip)
   2. windows 32-bit and 64-bit binaries + installer + source (bitcoin-${VERSION}-win-gitian.zip)
-  3. Gitian signatures (in gitian.sigs/${VERSION}[-win]/(your gitian key)/
+  3. OSX installer (Bitcoin-Qt.dmg)
+  4. Gitian signatures (in gitian.sigs/${VERSION}[-win|-osx]/(your gitian key)/
 
 repackage gitian builds for release as stand-alone zip/tar/installer exe
 
@@ -119,21 +149,6 @@ repackage gitian builds for release as stand-alone zip/tar/installer exe
 	zip -r bitcoin-${VERSION}-win.zip bitcoin-${VERSION}-win
 	rm -rf bitcoin-${VERSION}-win
 
-**Perform Mac build:**
-
-  OSX binaries are created by Gavin Andresen on a 64-bit, OSX 10.6 machine.
-
-	./autogen.sh
-        SDK=$(xcode-select --print-path)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk
-        CXXFLAGS="-mmacosx-version-min=10.6 -isysroot $SDK" ./configure --enable-upnp-default
-	make
-	export QTDIR=/opt/local/share/qt4  # needed to find translations/qt_*.qm files
-	T=$(contrib/qt_translations.py $QTDIR/translations src/qt/locale)
-        export CODESIGNARGS='--keychain ...path_to_keychain --sign "Developer ID Application: BITCOIN FOUNDATION, INC., THE"'
-	python2.7 contrib/macdeploy/macdeployqtplus Bitcoin-Qt.app -sign -add-qt-tr $T -dmg -fancy contrib/macdeploy/fancy.plist
-
- Build output expected: Bitcoin-Qt.dmg
-
 ###Next steps:
 
 * Code-sign Windows -setup.exe (in a Windows virtual machine using signtool)