Bug 1436283 - Build a modern gdb version for Wheezy. r=dustin

The GDB version in Debian wheezy doesn't handle the DWARF data that the
GCC version we use to build Firefox and toolchains produce. So we take
the GDB version from Debian stretch and backport it.

--HG--
extra : rebase_source : dae0e9dcd5dde5a7c74b6cefd560480fccd9c5fa

build/debian-packages/gdb-wheezy.diff

@@ -0,0 +1,65 @@
+diff -Nru gdb-7.12/debian/changelog gdb-7.12/debian/changelog
+--- gdb-7.12/debian/changelog	2017-01-19 19:28:25.000000000 +0900
++++ gdb-7.12/debian/changelog	2018-02-07 15:36:15.000000000 +0900
+@@ -1,3 +1,16 @@
++gdb (7.12-6.deb7moz1) wheezy; urgency=medium
++
++  * Mozilla backport for wheezy.
++  * debian/rules, debian/control: Don't use libbabeltrace, which is not
++    available on wheezy.
++  * debian/rules:
++    - Use DEB_HOST_{ARCH,GNU_TYPE} instead of DEB_TARGET_{ARCH,GNU_TYPE}
++      because the latter is not available on wheezy.
++    - Don't pass --dbgsym-migration to dh_strip, it's not supported on
++      wheezy's debhelper.
++
++ -- Mike Hommey <glandium@mozilla.com>  Wed, 07 Feb 2018 15:36:15 +0900
++
+ gdb (7.12-6) unstable; urgency=medium
+ 
+   * debian/patches: import 7.12 branch fixes
+diff -Nru gdb-7.12/debian/control gdb-7.12/debian/control
+--- gdb-7.12/debian/control	2017-01-17 20:01:41.000000000 +0900
++++ gdb-7.12/debian/control	2018-02-07 15:36:06.000000000 +0900
+@@ -33,8 +33,6 @@
+                libreadline-dev,
+                zlib1g-dev,
+                liblzma-dev,
+-               libbabeltrace-dev [amd64 armel armhf i386 kfreebsd-amd64 kfreebsd-i386 mips mipsel mips64el powerpc s390x],
+-               libbabeltrace-ctf-dev [amd64 armel armhf i386 kfreebsd-amd64 kfreebsd-i386 mips mipsel mips64el powerpc s390x],
+                python-dev,
+ # Python3 build
+                python3-dev,
+diff -Nru gdb-7.12/debian/rules gdb-7.12/debian/rules
+--- gdb-7.12/debian/rules	2016-12-15 09:31:54.000000000 +0900
++++ gdb-7.12/debian/rules	2018-02-07 15:36:15.000000000 +0900
+@@ -4,7 +4,6 @@
+ 
+ DEB_BUILDDIR := $(ALL_BUILDDIR)/objdir
+ DEB_DH_INSTALL_SOURCEDIR := $(shell pwd)/debian/tmp
+-DEB_DH_STRIP_ARGS_gdb = --dbgsym-migration='gdb-dbg (<< 7.12-1~)'
+ 
+ # Override CDBS's default CFLAGS, which also includes -Wall; gdb
+ # does not handle -Wunused well with -Werror, but defaults to
+@@ -35,8 +34,8 @@
+ DEB_HOST_GNU_SYSTEM := $(shell dpkg-architecture -qDEB_HOST_GNU_SYSTEM)
+ DEB_HOST_GNU_CPU := $(shell dpkg-architecture -qDEB_HOST_GNU_CPU)
+ DEB_HOST_GNU_TYPE := $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
+-DEB_TARGET_ARCH := $(shell dpkg-architecture -qDEB_TARGET_ARCH)
+-DEB_TARGET_GNU_TYPE := $(shell dpkg-architecture -qDEB_TARGET_GNU_TYPE)
++DEB_TARGET_ARCH := $(shell dpkg-architecture -qDEB_HOST_ARCH)
++DEB_TARGET_GNU_TYPE := $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
+ 
+ # Cross configuration support.  Check for an environment variable
+ # $GDB_TARGET, or a file debian/target.
+@@ -89,10 +88,6 @@
+   arch_config_args := --with-libunwind-ia64
+ endif
+ 
+-ifneq (,$(filter $(DEB_HOST_ARCH),amd64 armel armhf i386 kfreebsd-amd64 kfreebsd-i386 mips mipsel powerpc s390x))
+-  arch_config_args += --with-babeltrace
+-endif
+-
+ ifdef GDB_TARGET
+   run_tests := no
+ 

taskcluster/ci/packages/kind.yml

@@ -175,3 +175,14 @@ jobs:
         # of devscripts.
         - deb7-devscripts-2.14
         - deb7-dpkg-1.17
+
+  deb7-gdb:
+    description: "gdb for Debian wheezy"
+    treeherder:
+      symbol: Deb7(gdb)
+    run:
+      using: debian-package
+      dsc:
+        url: http://snapshot.debian.org/archive/debian/20170119T152956Z/pool/main/g/gdb/gdb_7.12-6.dsc
+        sha256: 9727dcb3d6b655e4f2a92110f5db076a490aa50b739804be239905ecff3aacc8
+      patch: gdb-wheezy.diff