Bug 1445536 - Add a toolchain job for GCC 7. r=froydnj

And adapt the build-gcc.sh script for the changes to
contrib/download_prerequisites.

--HG--
rename : taskcluster/scripts/misc/build-gcc-6-linux.sh => taskcluster/scripts/misc/build-gcc-7-linux.sh
extra : rebase_source : b1d785777b8c141c0eb0f52a73734abd2db21b94

build/unix/build-gcc/build-gcc.sh

@@ -29,11 +29,15 @@ prepare() {
     tar() { :; }
     sed() { :; }
     wget() {
-      echo $1
+      # Get last argument given to wget.
+      eval echo \$$# >&3
     }
 
+    # In GCC >= 7, the download_prerequisites script tried to do its own
+    # verification, but we have ours, so disable it.
+    set -- --no-verify
     . ./contrib/download_prerequisites
-  ) | while read url; do
+  ) 3>&1 > /dev/null | while read url; do
     file=$(basename $url)
     case "$file" in
     gmp-*.tar.*)
@@ -49,7 +53,15 @@ prepare() {
     mpc-*.tar.*)
       # If download_prerequisites wants 0.8.1, use 0.8.2 instead.
       file=${file/0.8.1/0.8.2}
-      download_and_check http://www.multiprecision.org/downloads $file.asc
+      case "$file" in
+      *-0.8.2.tar*|*-0.9.tar*|*-1.0.tar*)
+        ext=asc
+        ;;
+      *)
+        ext=sig
+        ;;
+      esac
+      download_and_check http://www.multiprecision.org/downloads $file.$ext
       ;;
     *)
       download $(dirname $url) $file

taskcluster/ci/toolchain/linux.yml

@@ -180,6 +180,23 @@ linux64-gcc-6:
         toolchain-alias: linux64-gcc
         toolchain-artifact: public/build/gcc.tar.xz
 
+linux64-gcc-7:
+    description: "GCC 7 toolchain build"
+    treeherder:
+        kind: build
+        platform: toolchains/opt
+        symbol: TL(gcc7)
+        tier: 1
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
+    worker:
+        max-run-time: 36000
+    run:
+        using: toolchain-script
+        script: build-gcc-7-linux.sh
+        resources:
+            - 'build/unix/build-gcc/build-gcc.sh'
+        toolchain-artifact: public/build/gcc.tar.xz
+
 linux64-sixgill:
     description: "sixgill GCC plugin build"
     treeherder:

taskcluster/scripts/misc/build-gcc-7-linux.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+
+# This script is for building GCC 7 for Linux.
+
+WORKSPACE=$HOME/workspace
+HOME_DIR=$WORKSPACE/build
+UPLOAD_DIR=$HOME/artifacts
+
+root_dir=$HOME_DIR
+data_dir=$HOME_DIR/src/build/unix/build-gcc
+
+. $data_dir/build-gcc.sh
+
+gcc_version=7.3.0
+gcc_ext=xz
+binutils_version=2.25.1
+binutils_ext=bz2
+
+# GPG key used to sign GCC
+$GPG --import $data_dir/13975A70E63C361C73AE69EF6EEB81F8981C74C7.key
+# GPG key used to sign binutils
+$GPG --import $data_dir/EAF1C276A747E9ED86210CBAC3126D3B4AE55E93.key
+# GPG key used to sign GMP
+$GPG --import $data_dir/343C2FF0FBEE5EC2EDBEF399F3599FF828C67298.key
+# GPG key used to sign MPFR
+$GPG --import $data_dir/07F3DBBECC1A39605078094D980C197698C3739D.key
+# GPG key used to sign MPC
+$GPG --import $data_dir/AD17A21EF8AED8F1CC02DBD9F7D5C9BF765C61E3.key
+
+cat > $HOME_DIR/checksums <<EOF
+b5b14added7d78a8d1ca70b5cb75fef57ce2197264f4f5835326b0df22ac9f22  binutils-2.25.1.tar.bz2
+832ca6ae04636adbb430e865a1451adf6979ab44ca1c8374f61fba65645ce15c  gcc-7.3.0.tar.xz
+498449a994efeba527885c10405993427995d3f86b8768d8cdf8d9dd7c6b73e8  gmp-6.1.0.tar.bz2
+412538bb65c799ac98e17e8cfcdacbb257a57362acfaaff254b0fcae970126d2  isl-0.16.1.tar.bz2
+617decc6ea09889fb08ede330917a00b16809b8db88c29c31bfbb49cbf88ecc3  mpc-1.0.3.tar.gz
+d3103a80cdad2407ed581f3618c4bed04e0c92d1cf771a65ead662cc397f7775  mpfr-3.1.4.tar.bz2
+EOF
+
+prepare
+build_binutils
+build_gcc
+
+# Put a tarball in the artifacts dir
+mkdir -p $UPLOAD_DIR
+cp $HOME_DIR/gcc.tar.* $UPLOAD_DIR