diff --git a/contrib/devtools/symbol-check.py b/contrib/devtools/symbol-check.py
index 34f1ed2d1..93acfcdda 100755
--- a/contrib/devtools/symbol-check.py
+++ b/contrib/devtools/symbol-check.py
@@ -49,7 +49,24 @@ IGNORE_EXPORTS = {
 READELF_CMD = os.getenv('READELF', '/usr/bin/readelf')
 CPPFILT_CMD = os.getenv('CPPFILT', '/usr/bin/c++filt')
 # Allowed NEEDED libraries
-ALLOWED_LIBRARIES = {'librt.so.1','libpthread.so.0','libanl.so.1','libm.so.6','libgcc_s.so.1','libc.so.6','ld-linux-x86-64.so.2'}
+ALLOWED_LIBRARIES = {
+# bitcoind and bitcoin-qt
+'libgcc_s.so.1', # GCC base support
+'libc.so.6', # C library
+'libpthread.so.0', # threading
+'libanl.so.1', # DNS resolve
+'libm.so.6', # math library
+'librt.so.1', # real-time (clock)
+'ld-linux-x86-64.so.2', # 64-bit dynamic linker
+'ld-linux.so.2', # 32-bit dynamic linker
+# bitcoin-qt only
+'libX11-xcb.so.1', # part of X11
+'libX11.so.6', # part of X11
+'libxcb.so.1', # part of X11
+'libfontconfig.so.1', # font support
+'libfreetype.so.6', # font parsing
+'libdl.so.2' # programming interface to dynamic linker
+}
 
 class CPPFilt(object):
     '''
diff --git a/contrib/gitian-descriptors/README.md b/contrib/gitian-descriptors/README.md
index 061b897d2..07c2ba98b 100644
--- a/contrib/gitian-descriptors/README.md
+++ b/contrib/gitian-descriptors/README.md
@@ -27,7 +27,7 @@ Once you've got the right hardware and software:
 
     # Create base images
     cd gitian-builder
-    bin/make-base-vm --suite precise --arch amd64
+    bin/make-base-vm --suite trusty --arch amd64
     cd ..
 
     # Get inputs (see doc/release-process.md for exact inputs needed and where to get them)
diff --git a/contrib/gitian-descriptors/gitian-linux.yml b/contrib/gitian-descriptors/gitian-linux.yml
index a98a71e2f..0c3c439dd 100644
--- a/contrib/gitian-descriptors/gitian-linux.yml
+++ b/contrib/gitian-descriptors/gitian-linux.yml
@@ -2,20 +2,19 @@
 name: "bitcoin-linux-0.12"
 enable_cache: true
 suites:
-- "precise"
+- "trusty"
 architectures:
 - "amd64"
 packages: 
 - "g++-multilib"
 - "git-core"
 - "pkg-config"
-- "autoconf2.13"
+- "autoconf"
 - "libtool"
 - "automake"
 - "faketime"
 - "bsdmainutils"
 - "binutils-gold"
-- "libstdc++6-4.6-pic"
 reference_datetime: "2015-06-01 00:00:00"
 remotes:
 - "url": "https://github.com/bitcoin/bitcoin.git"
@@ -44,7 +43,7 @@ script: |
   for prog in ${FAKETIME_PROGS}; do
     echo '#!/bin/bash' > ${WRAP_DIR}/${prog}
     echo "REAL=\`which -a ${prog} | grep -v ${WRAP_DIR}/${prog} | head -1\`" >> ${WRAP_DIR}/${prog}
-    echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
+    echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
     echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${prog}
     echo "\$REAL \$@" >> $WRAP_DIR/${prog}
     chmod +x ${WRAP_DIR}/${prog}
@@ -55,7 +54,7 @@ script: |
     for prog in ${FAKETIME_HOST_PROGS}; do
         echo '#!/bin/bash' > ${WRAP_DIR}/${i}-${prog}
         echo "REAL=\`which -a ${i}-${prog} | grep -v ${WRAP_DIR}/${i}-${prog} | head -1\`" >> ${WRAP_DIR}/${i}-${prog}
-        echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${i}-${prog}
+        echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${i}-${prog}
         echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${i}-${prog}
         echo "\$REAL \$@" >> $WRAP_DIR/${i}-${prog}
         chmod +x ${WRAP_DIR}/${i}-${prog}
@@ -70,14 +69,6 @@ script: |
     make ${MAKEOPTS} -C ${BASEPREFIX} HOST="${i}"
   done
 
-  # Ubuntu precise hack: Not an issue in later versions.
-  # Precise's libstdc++.a is non-pic. There's an optional libstdc++6-4.6-pic
-  #   package which provides libstdc++_pic.a, but the linker can't find it.
-  # Symlink it to a path that will be included in our link-line so that the
-  # linker picks it up before the default libstdc++.a.
-  # This is only necessary for 64bit.
-  ln -s /usr/lib/gcc/x86_64-linux-gnu/4.6/libstdc++_pic.a ${BASEPREFIX}/x86_64-unknown-linux-gnu/lib/libstdc++.a
-
   # Create the release tarball using (arbitrarily) the first host
   ./autogen.sh
   ./configure --prefix=${BASEPREFIX}/`echo "${HOSTS}" | awk '{print $1;}'`
diff --git a/contrib/gitian-descriptors/gitian-osx-signer.yml b/contrib/gitian-descriptors/gitian-osx-signer.yml
index 36d7b0126..aa9494b7e 100644
--- a/contrib/gitian-descriptors/gitian-osx-signer.yml
+++ b/contrib/gitian-descriptors/gitian-osx-signer.yml
@@ -1,7 +1,7 @@
 ---
 name: "bitcoin-dmg-signer"
 suites:
-- "precise"
+- "trusty"
 architectures:
 - "amd64"
 packages:
@@ -23,7 +23,7 @@ script: |
   for prog in ${FAKETIME_PROGS}; do
     echo '#!/bin/bash' > ${WRAP_DIR}/${prog}
     echo "REAL=\`which -a ${prog} | grep -v ${WRAP_DIR}/${prog} | head -1\`" >> ${WRAP_DIR}/${prog}
-    echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
+    echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
     echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${prog}
     echo "\$REAL \$@" >> $WRAP_DIR/${prog}
     chmod +x ${WRAP_DIR}/${prog}
diff --git a/contrib/gitian-descriptors/gitian-osx.yml b/contrib/gitian-descriptors/gitian-osx.yml
index eeeb408de..9ac774c8a 100644
--- a/contrib/gitian-descriptors/gitian-osx.yml
+++ b/contrib/gitian-descriptors/gitian-osx.yml
@@ -2,14 +2,14 @@
 name: "bitcoin-osx-0.12"
 enable_cache: true
 suites:
-- "precise"
+- "trusty"
 architectures:
 - "amd64"
 packages: 
 - "g++"
 - "git-core"
 - "pkg-config"
-- "autoconf2.13"
+- "autoconf"
 - "libtool"
 - "automake"
 - "faketime"
@@ -49,7 +49,7 @@ script: |
   for prog in ${FAKETIME_PROGS}; do
     echo '#!/bin/bash' > ${WRAP_DIR}/${prog}
     echo "REAL=\`which -a ${prog} | grep -v ${WRAP_DIR}/${prog} | head -1\`" >> ${WRAP_DIR}/${prog}
-    echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
+    echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
     echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${prog}
     echo "\$REAL \$@" >> $WRAP_DIR/${prog}
     chmod +x ${WRAP_DIR}/${prog}
@@ -60,7 +60,7 @@ script: |
     for prog in ${FAKETIME_HOST_PROGS}; do
         echo '#!/bin/bash' > ${WRAP_DIR}/${i}-${prog}
         echo "REAL=\`which -a ${i}-${prog} | grep -v ${WRAP_DIR}/${i}-${prog} | head -1\`" >> ${WRAP_DIR}/${i}-${prog}
-        echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${i}-${prog}
+        echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${i}-${prog}
         echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${i}-${prog}
         echo "\$REAL \$@" >> $WRAP_DIR/${i}-${prog}
         chmod +x ${WRAP_DIR}/${i}-${prog}
diff --git a/contrib/gitian-descriptors/gitian-win-signer.yml b/contrib/gitian-descriptors/gitian-win-signer.yml
index 2a73050e0..a29d7ab47 100644
--- a/contrib/gitian-descriptors/gitian-win-signer.yml
+++ b/contrib/gitian-descriptors/gitian-win-signer.yml
@@ -1,7 +1,7 @@
 ---
 name: "bitcoin-win-signer"
 suites:
-- "precise"
+- "trusty"
 architectures:
 - "amd64"
 packages:
diff --git a/contrib/gitian-descriptors/gitian-win.yml b/contrib/gitian-descriptors/gitian-win.yml
index 5fa0db678..6bb482d45 100644
--- a/contrib/gitian-descriptors/gitian-win.yml
+++ b/contrib/gitian-descriptors/gitian-win.yml
@@ -2,14 +2,14 @@
 name: "bitcoin-win-0.12"
 enable_cache: true
 suites:
-- "precise"
+- "trusty"
 architectures:
 - "amd64"
 packages: 
 - "g++"
 - "git-core"
 - "pkg-config"
-- "autoconf2.13"
+- "autoconf"
 - "libtool"
 - "automake"
 - "faketime"
@@ -46,7 +46,7 @@ script: |
   for prog in ${FAKETIME_PROGS}; do
     echo '#!/bin/bash' > ${WRAP_DIR}/${prog}
     echo "REAL=\`which -a ${prog} | grep -v ${WRAP_DIR}/${prog} | head -1\`" >> ${WRAP_DIR}/${prog}
-    echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
+    echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${prog}
     echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${prog}
     echo "\$REAL \$@" >> $WRAP_DIR/${prog}
     chmod +x ${WRAP_DIR}/${prog}
@@ -57,12 +57,36 @@ script: |
     for prog in ${FAKETIME_HOST_PROGS}; do
         echo '#!/bin/bash' > ${WRAP_DIR}/${i}-${prog}
         echo "REAL=\`which -a ${i}-${prog} | grep -v ${WRAP_DIR}/${i}-${prog} | head -1\`" >> ${WRAP_DIR}/${i}-${prog}
-        echo 'export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${i}-${prog}
+        echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${i}-${prog}
         echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${i}-${prog}
         echo "\$REAL \$@" >> $WRAP_DIR/${i}-${prog}
         chmod +x ${WRAP_DIR}/${i}-${prog}
     done
   done
+
+  # Create per-host linker wrapper
+  # This is only needed for trusty, as the mingw linker leaks a few bytes of
+  # heap, causing non-determinism. See discussion in https://github.com/bitcoin/bitcoin/pull/6900
+  for i in $HOSTS; do
+    mkdir -p ${WRAP_DIR}/${i}
+    for prog in collect2; do
+        echo '#!/bin/bash' > ${WRAP_DIR}/${i}/${prog}
+        REAL=$(${i}-gcc -print-prog-name=${prog})
+        echo "export MALLOC_PERTURB_=255" >> ${WRAP_DIR}/${i}/${prog}
+        echo "${REAL} \$@" >> $WRAP_DIR/${i}/${prog}
+        chmod +x ${WRAP_DIR}/${i}/${prog}
+    done
+    for prog in gcc g++; do
+        echo '#!/bin/bash' > ${WRAP_DIR}/${i}-${prog}
+        echo "REAL=\`which -a ${i}-${prog} | grep -v ${WRAP_DIR}/${i}-${prog} | head -1\`" >> ${WRAP_DIR}/${i}-${prog}
+        echo 'export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1' >> ${WRAP_DIR}/${i}-${prog}
+        echo "export FAKETIME=\"${REFERENCE_DATETIME}\"" >> ${WRAP_DIR}/${i}-${prog}
+        echo "export COMPILER_PATH=${WRAP_DIR}/${i}" >> ${WRAP_DIR}/${i}-${prog}
+        echo "\$REAL \$@" >> $WRAP_DIR/${i}-${prog}
+        chmod +x ${WRAP_DIR}/${i}-${prog}
+    done
+  done
+
   export PATH=${WRAP_DIR}:${PATH}
 
   cd bitcoin
diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
index cba2fbd15..901b761fd 100644
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -8,7 +8,7 @@ $(package)_dependencies=openssl
 $(package)_linux_dependencies=freetype fontconfig dbus libxcb libX11 xproto libXext
 $(package)_build_subdir=qtbase
 $(package)_qt_libs=corelib network widgets gui plugins testlib
-$(package)_patches=mac-qmake.conf fix-xcb-include-order.patch mingw-uuidof.patch
+$(package)_patches=mac-qmake.conf fix-xcb-include-order.patch mingw-uuidof.patch pidlist_absolute.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=c4bd6db6e426965c6f8824c54e81f68bbd61e2bae1bcadc328c6e81c45902a0d
@@ -122,9 +122,6 @@ endef
 define $(package)_preprocess_cmds
   sed -i.old "s|updateqm.commands = \$$$$\$$$$LRELEASE|updateqm.commands = $($(package)_extract_dir)/qttools/bin/lrelease|" qttranslations/translations/translations.pro && \
   sed -i.old "s/src_plugins.depends = src_sql src_xml src_network/src_plugins.depends = src_xml src_network/" qtbase/src/src.pro && \
-  sed -i.old "s/PIDLIST_ABSOLUTE/ITEMIDLIST */" qtbase/src/plugins/platforms/windows/qwindowscontext.h &&\
-  sed -i.old "s/PIDLIST_ABSOLUTE/ITEMIDLIST */" qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp &&\
-  sed -i.old "s/PCIDLIST_ABSOLUTE/const ITEMIDLIST */" qtbase/src/plugins/platforms/windows/qwindowscontext.h &&\
   sed -i.old "s|X11/extensions/XIproto.h|X11/X.h|" qtbase/src/plugins/platforms/xcb/qxcbxsettings.cpp && \
   sed -i.old 's/if \[ "$$$$XPLATFORM_MAC" = "yes" \]; then xspecvals=$$$$(macSDKify/if \[ "$$$$BUILD_ON_MAC" = "yes" \]; then xspecvals=$$$$(macSDKify/' qtbase/configure && \
   mkdir -p qtbase/mkspecs/macx-clang-linux &&\
@@ -134,6 +131,7 @@ define $(package)_preprocess_cmds
   cp -f $($(package)_patch_dir)/mac-qmake.conf qtbase/mkspecs/macx-clang-linux/qmake.conf && \
   patch -p1 < $($(package)_patch_dir)/fix-xcb-include-order.patch && \
   patch -p1 < $($(package)_patch_dir)/mingw-uuidof.patch && \
+  patch -p1 < $($(package)_patch_dir)/pidlist_absolute.patch && \
   echo "QMAKE_CFLAGS     += $($(package)_cflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "QMAKE_CXXFLAGS   += $($(package)_cxxflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "QMAKE_LFLAGS     += $($(package)_ldflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
diff --git a/depends/patches/qt/pidlist_absolute.patch b/depends/patches/qt/pidlist_absolute.patch
new file mode 100644
index 000000000..0b49c050d
--- /dev/null
+++ b/depends/patches/qt/pidlist_absolute.patch
@@ -0,0 +1,37 @@
+diff -dur old/qtbase/src/plugins/platforms/windows/qwindowscontext.h new/qtbase/src/plugins/platforms/windows/qwindowscontext.h
+--- old/qtbase/src/plugins/platforms/windows/qwindowscontext.h	2015-06-29 22:04:40.000000000 +0200
++++ new/qtbase/src/plugins/platforms/windows/qwindowscontext.h	2015-11-01 12:55:59.751234846 +0100
+@@ -124,10 +124,18 @@
+     inline void init();
+ 
+     typedef HRESULT (WINAPI *SHCreateItemFromParsingName)(PCWSTR, IBindCtx *, const GUID&, void **);
++#if defined(Q_CC_MINGW) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 3)
++    typedef HRESULT (WINAPI *SHGetKnownFolderIDList)(const GUID &, DWORD, HANDLE, ITEMIDLIST **);
++#else
+     typedef HRESULT (WINAPI *SHGetKnownFolderIDList)(const GUID &, DWORD, HANDLE, PIDLIST_ABSOLUTE *);
++#endif
+     typedef HRESULT (WINAPI *SHGetStockIconInfo)(int , int , _SHSTOCKICONINFO *);
+     typedef HRESULT (WINAPI *SHGetImageList)(int, REFIID , void **);
++#if defined(Q_CC_MINGW) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 3)
++    typedef HRESULT (WINAPI *SHCreateItemFromIDList)(const ITEMIDLIST *, REFIID, void **);
++#else
+     typedef HRESULT (WINAPI *SHCreateItemFromIDList)(PCIDLIST_ABSOLUTE, REFIID, void **);
++#endif
+ 
+     SHCreateItemFromParsingName sHCreateItemFromParsingName;
+     SHGetKnownFolderIDList sHGetKnownFolderIDList;
+diff -dur old/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp new/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp
+--- old/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp	2015-06-29 22:04:40.000000000 +0200
++++ new/qtbase/src/plugins/platforms/windows/qwindowsdialoghelpers.cpp	2015-11-01 13:41:09.503149772 +0100
+@@ -1008,7 +1008,11 @@
+             qWarning() << __FUNCTION__ << ": Invalid CLSID: " << url.path();
+             return Q_NULLPTR;
+         }
++#if defined(Q_CC_MINGW) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 3)
++        ITEMIDLIST *idList;
++#else
+         PIDLIST_ABSOLUTE idList;
++#endif
+         HRESULT hr = QWindowsContext::shell32dll.sHGetKnownFolderIDList(uuid, 0, 0, &idList);
+         if (FAILED(hr)) {
+             qErrnoWarning("%s: SHGetKnownFolderIDList(%s)) failed", __FUNCTION__, qPrintable(url.toString()));
diff --git a/doc/gitian-building.md b/doc/gitian-building.md
index 43de87d4b..019e85169 100644
--- a/doc/gitian-building.md
+++ b/doc/gitian-building.md
@@ -320,7 +320,7 @@ Execute the following as user `debian`:
 
 ```bash
 cd gitian-builder
-bin/make-base-vm --lxc --arch amd64 --suite precise
+bin/make-base-vm --lxc --arch amd64 --suite trusty
 ```
 
 There will be a lot of warnings printed during the build of the image. These can be ignored.