From df28df55eb17170eee0f88bba0be41d038490e3f Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Fri, 17 Apr 2020 15:31:05 +0200
Subject: extra/rust140: for building rust 1.40. from 1.39

---
 build-support/rust140/PKGBUILD          | 231 ++++++++++++++++++++++++++++++++
 build-support/rust140/config.toml.patch | Bin 0 -> 660 bytes
 build-support/rust140/watcher.sh        |  27 ++++
 3 files changed, 258 insertions(+)
 create mode 100644 build-support/rust140/PKGBUILD
 create mode 100644 build-support/rust140/config.toml.patch
 create mode 100755 build-support/rust140/watcher.sh

diff --git a/build-support/rust140/PKGBUILD b/build-support/rust140/PKGBUILD
new file mode 100644
index 00000000..444f098e
--- /dev/null
+++ b/build-support/rust140/PKGBUILD
@@ -0,0 +1,231 @@
+# Maintainer: Johannes Löthberg <johannes@kyriasis.com>
+# Contributor: Alexander F Rødseth <xyproto@archlinux.org>
+# Contributor: Daniel Micay <danielmicay@gmail.com>
+# Contributor: userwithuid <userwithuid@gmail.com>
+
+pkgname=('rust140' 'rust140-docs')
+epoch=1
+pkgver=1.40.0
+pkgrel=1
+
+_llvm_ver=9.0.1
+
+pkgdesc='Systems programming language focused on safety, speed and concurrency'
+url='https://www.rust-lang.org/'
+arch=(i486 i686 pentium4 'x86_64')
+license=('MIT' 'Apache')
+
+makedepends=('rust=1.39.0' "llvm=$_llvm_ver" 'libffi' 'perl' 'python' 'curl' 'cmake')
+checkdepends=('procps-ng' 'gdb')
+
+options=('!emptydirs')
+
+source=("https://static.rust-lang.org/dist/rustc-$pkgver-src.tar.gz"{,.asc}
+        "https://github.com/llvm/llvm-project/releases/download/llvmorg-$_llvm_ver/compiler-rt-$_llvm_ver.src.tar.xz"{,.sig})
+
+sha256sums=('d2e8f931d16a0539faaaacd801e0d92c58df190269014b2360c6ab2a90ee3475'
+            'SKIP'
+            'c2bfab95c9986318318363d7f371a85a95e333bc0b34fbfa52edbd3f5e3a9077'
+            'SKIP')
+validpgpkeys=('108F66205EAEB0AAA8DD5E1C85AB96E6FA1BE5FE'  # Rust Language (Tag and Release Signing Key) <rust-key@rust-lang.org>
+              '474E22316ABF4785A88C6E8EA2C794A986419D8A'  # Tom Stellard <tstellar@redhat.com>
+              'B6C8F98282B944E3B0D5C2530FC3042E345AD05D') # Hans Wennborg <hans@chromium.org>
+
+prepare() {
+  cd "rustc-$pkgver-src"
+
+  cat >config.toml <<END
+[llvm]
+link-shared = true
+
+[build]
+target = ["x86_64-unknown-linux-gnu", "i686-unknown-linux-gnu"]
+cargo = "/usr/bin/cargo"
+rustc = "/usr/bin/rustc"
+python = "/usr/bin/python"
+extended = true
+sanitizers = false
+profiler = true
+vendor = true
+
+[install]
+prefix = "/usr"
+
+[rust]
+# LLVM crashes when passing an object through ThinLTO twice.  This is triggered when using rust
+# code in cross-language LTO if libstd was built using ThinLTO.
+# http://blog.llvm.org/2019/09/closing-gap-cross-language-lto-between.html
+# https://github.com/rust-lang/rust/issues/54872
+codegen-units-std = 1
+
+debuginfo-level = 2
+
+channel = "stable"
+
+rpath = false
+
+[target.x86_64-unknown-linux-gnu]
+llvm-config = "/usr/bin/llvm-config"
+END
+}
+
+build() {
+  cd "rustc-$pkgver-src"
+
+  export RUST_BACKTRACE=1
+  export RUST_COMPILER_RT_ROOT="$srcdir/compiler-rt-$_llvm_ver.src"
+
+  python ./x.py dist -j "$(nproc)"
+  DESTDIR="$PWD"/dest-rust python ./x.py install -j "$(nproc)"
+
+  # move docs and lib32 libs out of the way for splitting
+  mv dest-rust/usr/lib/rustlib/i686-unknown-linux-gnu dest-i686
+  mv dest-rust/usr/share/doc dest-doc
+}
+
+package_rust140() {
+  depends=('gcc-libs' 'llvm-libs' 'curl' 'libssh2')
+  optdepends=('lldb: rust-lldb script'
+              'gdb: rust-gdb script')
+  provides=('cargo' 'rustfmt')
+  conflicts=('cargo' 'rustfmt')
+  replaces=('cargo' 'rustfmt')
+
+  cd "rustc-$pkgver-src"
+
+  mv dest-rust/* "$pkgdir"
+  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*
+
+  # delete unnecesary files, e.g. components and manifest files only used for the uninstall script
+  cd "$pkgdir"/usr/lib/rustlib
+  rm components install.log manifest-* rust-installer-version uninstall.sh
+
+  # rustbuild always installs copies of the shared libraries to /usr/lib,
+  # overwrite them with symlinks to the per-architecture versions
+  ln -srft "$pkgdir"/usr/lib x86_64-unknown-linux-gnu/lib/*.so
+
+  install -d "$pkgdir"/usr/share/bash-completion
+  mv "$pkgdir"/etc/bash_completion.d/ "$pkgdir"/usr/share/bash-completion/completions/
+}
+
+package_lib32-rust-libs() {
+  descriptino=('32-bit libraries for Rust')
+  depends=('lib32-gcc-libs')
+  provides=('lib32-rust')
+  conflicts=('lib32-rust')
+  replaces=('lib32-rust')
+
+  cd "rustc-$pkgver-src"
+  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*
+
+  install -d "$pkgdir"/usr/lib/rustlib/ "$pkgdir"/usr/lib32/
+  mv dest-i686 "$pkgdir"/usr/lib/rustlib/i686-unknown-linux-gnu
+  ln -srft "$pkgdir"/usr/lib32 "$pkgdir"/usr/lib/rustlib/i686-unknown-linux-gnu/lib/*.so
+}
+
+package_rust140-docs() {
+  description=('Documentation for the Rust programming language')
+
+  cd "rustc-$pkgver-src"
+  install -Dm644 -t "$pkgdir/usr/share/licenses/$pkgname" LICENSE*
+
+  install -d "$pkgdir"/usr/share/doc
+  mv dest-doc/* "$pkgdir"/usr/share/doc
+}
+
+# vim:set ts=2 sw=2 et:
+# enable i686-unknown-linux-gnu target
+# and replace pentium4 (SSE2) with pentium3 (no SSE2) in the compiler spec file
+#
+# Also trying to reduce memory usage by building with
+# -debuginfo-level-std=1
+# see https://github.com/rust-lang/rust/issues/60294
+
+source+=(config.toml.patch)
+sha256sums+=('42e861ba90335d0e2e666e10b12d9ff85ea1bdb711176fb3c09e92375e193660')
+
+eval "$(
+  declare -f prepare | \
+    sed '
+      $ i patch -p1 -i "$srcdir/config.toml.patch"
+    '
+)"
+
+# stop insanity of nproc (see FS#62952)
+eval "$(
+  declare -f build | \
+    sed '
+      s/-j"$(nproc)"/-j16/
+    '
+)"
+
+if [ "${CARCH}" != 'pentium4' ]; then
+  eval "$(
+    declare -f prepare | \
+      sed '
+        $ i sed -i "s/pentium4/pentium3/g" "$srcdir/rustc-$pkgver-src/vendor/rustc-ap-rustc_target/spec/i686_unknown_linux_gnu.rs"
+        $ i sed -i "s/pentium4/pentium3/g" "$srcdir/rustc-$pkgver-src/src/librustc_target/spec/i686_unknown_linux_gnu.rs"
+        $ i sed -i "s/a75a6025d7e3424edf9baf3039056c0f8eea157631a175d00ac5a218aa54b510/484bf8be15015b330fa9a97b6dabb8c7627e59d5cddb2dd0e83478749f8aabad/g" "$srcdir/rustc-$pkgver-src/vendor/rustc-ap-rustc_target/.cargo-checksum.json"
+      '
+  )"
+fi
+
+# Don't move lib32 support into rust32-lib, we are on 32-bit in the end
+# and don't draw a symlink to 64-bit libraries (but to 32-bit instead)
+
+pkgname=(
+  $(
+    printf '%s\n' "${pkgname[@]}" | \
+      grep -v '^lib32-rust-libs'
+  )
+)
+
+eval "$(
+  declare -f package_rust140 | \
+    sed '
+      /mv.*i686-unknown-linux-gnu.*/d
+      /ln /s/x86_64-unknown-linux-gnu/i686-unknown-linux-gnu/g
+    '
+)"
+
+eval "$(
+  declare -f build | \
+    sed '
+      /mv.*i686-unknown-linux-gnu.*/d
+      /ln /s/x86_64-unknown-linux-gnu/i686-unknown-linux-gnu/g
+    '
+)"
+
+# watch for files changing which need patching during the x.py craziness!
+# currently this is duplicate U1024 and P1024 types (this is currently needed
+# for i686 and 1.38.0)
+source+=('watcher.sh')
+sha256sums+=('c91b55a428ef463fc1529724da0c7f3930bd9d4b32b4596a14be77cc3f1e0594')
+
+if [ "${CARCH}" = "i686" ]; then
+  makedepends+=('inotify-tools' 'procps-ng')
+  
+  eval "$(
+    declare -f build | \
+      sed '
+        /\.\/x.py/ i \
+          chmod u+x "$srcdir/watcher.sh" \
+          "$srcdir/watcher.sh" "$srcdir" & \
+          _kill_pid=$! \
+           sleep 10
+        /\.\/x.py/ a \
+          kill $_kill_pid || true
+      '
+  )"
+fi
+
+# Enable on demand, if your previous rust is broken, see also build-support and AUR
+# for rust-bin.
+#makedepends=(${makedepends[@]//rust/})
+#makedepends+=('rust-bin')
+sha256sums=('dd97005578defc10a482bff3e4e728350d2099c60ffcf1f5e189540c39a549ad'
+            'SKIP'
+            'c2bfab95c9986318318363d7f371a85a95e333bc0b34fbfa52edbd3f5e3a9077'
+            'SKIP'
+            '42e861ba90335d0e2e666e10b12d9ff85ea1bdb711176fb3c09e92375e193660'
+            'c91b55a428ef463fc1529724da0c7f3930bd9d4b32b4596a14be77cc3f1e0594')
diff --git a/build-support/rust140/config.toml.patch b/build-support/rust140/config.toml.patch
new file mode 100644
index 00000000..8d0762cd
Binary files /dev/null and b/build-support/rust140/config.toml.patch differ
diff --git a/build-support/rust140/watcher.sh b/build-support/rust140/watcher.sh
new file mode 100755
index 00000000..98228b5d
--- /dev/null
+++ b/build-support/rust140/watcher.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+term() {
+  echo "--> Got SIGTERM"
+  echo "--> killing inotifywait with PID $inotifywait"
+  kill -TERM "$inotifywait"
+  sleep 10
+  kill -9 "$inotifywait"
+}
+
+srcdir="$1"
+
+trap term SIGTERM
+
+inotifywait -mr -e close_write --format %w%f $srcdir | while read -r FILE; do
+  case "$FILE" in
+    *consts.rs)
+      echo "--> patching $FILE"
+      sed -i '/pub type U1024/d;/pub type P1024/d' $FILE
+      echo "--> finished patching $FILE"
+      ;;
+  esac
+done &
+inotifywait=$(ps -ef | grep inotifywait | grep -v grep | tr -s ' ' | cut -d ' ' -f2)
+echo "--> waiting for inotifywait $inotifywait"
+wait "$inotifywait"
+echo "--> watcher terminated"
-- 
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