diff --git a/build-auto.sh b/build-auto.sh
index 7666066..1e27c3a 100755
--- a/build-auto.sh
+++ b/build-auto.sh
@@ -9,6 +9,36 @@ if ! hostname | grep -q ^gitbuilder- ; then
     exit 1
 fi
 
+if hostname | grep -q -- -clang ; then
+    echo "hostname has -clang, will build with CC=clang CXX=clang++"
+    export CC=clang
+    export CXX=clang++
+    # Workaround nfortunate interactions between clang and distcc < 3.2.
+    export CCACHE_CPP2=yes
+    export CFLAGS="-Qunused-arguments $CFLAGS"
+    export CXXFLAGS="-Qunused-arguments $CXXFLAXS"
+fi
+if hostname | grep -q -- -analyze ; then
+    echo "hostname has -analyze, will wrap build with scan-build static analyzer"
+    echo "Disabling CCache to ensure complete coverage."
+    export CCACHE_DISABLE=yes
+    export BUILD_WRAPPER="scan-build -o scan-build-report.tmp/"
+fi
+if hostname | grep -q -- -asan; then
+    echo "hostname has -asan, will build with -fsanitize=address"
+    export CFLAGS="-fsanitize=address $CFLAGS"
+    export CXXFLAGS="-fsanitize=address $CXXFLAGS"
+fi
+if hostname | grep -q -- -tsan; then
+    echo "hostname has -tsan, will build with -fsanitize=thread"
+    export CFLAGS="-fsanitize=thread $CFLAGS"
+    export CXXFLAGS="-fsanitize=thread $CXXFLAGS"
+fi
+if hostname | grep -q -- -wall; then
+    echo "hostname has -wall, will build with all possible warnings enabled"
+    export CFLAGS="-Wall -Weverything -Wpedantic $CFLAGS"
+    export CXXFLAGS="-Wall -Weverything -Wpedantic $CXXFLAGS"
+fi
 if hostname | grep -q -- -notcmalloc ; then
     echo "hostname has -notcmalloc, will build --without-tcmalloc --without-cryptopp"
     export CEPH_EXTRA_CONFIGURE_ARGS="$CEPH_EXTRA_CONFIGURE_ARGS --without-tcmalloc"
diff --git a/build-ceph-deb-native.sh b/build-ceph-deb-native.sh
index d99d73f..d66b270 100755
--- a/build-ceph-deb-native.sh
+++ b/build-ceph-deb-native.sh
@@ -18,13 +18,23 @@ rm -rf .git/modules/
 /srv/git/bin/git submodule update --init
 git clean -fdx
 
+# If CC is not already defined, use gcc.
+if [ "x$CC" = "x" ]; then
+    export CC=gcc
+fi
+
+# If CXX is not already defined, use g++.
+if [ "x$CXX" = "x" ]; then
+    export CXX=g++
+fi
+
 DIST=`lsb_release -sc`
 
 echo --START-IGNORE-WARNINGS
 [ ! -x autogen.sh ] || ./autogen.sh || exit 1
 autoconf || true
 echo --STOP-IGNORE-WARNINGS
-[ ! -x configure ] || CFLAGS="-fno-omit-frame-pointer -g -O2" CXXFLAGS="-fno-omit-frame-pointer -g -O2" ./configure --with-debug --with-radosgw --with-fuse --with-tcmalloc --with-libatomic-ops --with-gtk2 --with-profiler --enable-cephfs-java || exit 2
+[ ! -x configure ] || CFLAGS="-fno-omit-frame-pointer -g -O2 $CFLAGS" CXXFLAGS="-fno-omit-frame-pointer -g -O2 $CXXFLAGS" ./configure --with-debug --with-radosgw --with-fuse --with-tcmalloc --with-libatomic-ops --with-gtk2 --with-profiler --enable-cephfs-java || exit 2
 
 if [ ! -e Makefile ]; then
     echo "$0: no Makefile, aborting." 1>&2
@@ -42,7 +52,7 @@ if command -v ccache >/dev/null; then
   if [ ! -e "$CCACHE_DIR" ]; then
     echo "$0: have ccache but cache directory does not exist: $CCACHE_DIR" 1>&2
   else
-    set -- CC='ccache gcc' CXX='ccache g++'
+    set -- CC="ccache $CC" CXX="ccache $CXX"
   fi
 else
   echo "$0: no ccache found, compiles will be slower." 1>&2
diff --git a/build-ceph-deb.sh b/build-ceph-deb.sh
index ef5b7d0..e507528 100755
--- a/build-ceph-deb.sh
+++ b/build-ceph-deb.sh
@@ -18,6 +18,15 @@ rm -rf .git/modules/
 /srv/git/bin/git submodule update --init
 git clean -fdx
 
+# If CC is not already defined, use gcc.
+if [ "x$CC" = "x" ]; then
+    export CC=gcc
+fi
+
+# If CXX is not already defined, use g++.
+if [ "x$CXX" = "x" ]; then
+    export CXX=g++
+fi
 
 DISTS=`cat ../../dists`
 
@@ -43,7 +52,7 @@ if command -v ccache >/dev/null; then
   if [ ! -e "$CCACHE_DIR" ]; then
     echo "$0: have ccache but cache directory does not exist: $CCACHE_DIR" 1>&2
   else
-    set -- CC='ccache gcc' CXX='ccache g++'
+    set -- CC="ccache $CC" CXX="ccache $CXX"
   fi
 else
   echo "$0: no ccache found, compiles will be slower." 1>&2
diff --git a/build-ceph-gcov.sh b/build-ceph-gcov.sh
index f3f7ea4..f4892ed 100755
--- a/build-ceph-gcov.sh
+++ b/build-ceph-gcov.sh
@@ -19,6 +19,16 @@ rm -rf .git/modules/
 /srv/git/bin/git submodule update --init
 git clean -fdx
 
+# If CC is not already defined, use gcc.
+if [ "x$CC" = "x" ]; then
+    export CC=gcc
+fi
+
+# If CXX is not already defined, use g++.
+if [ "x$CXX" = "x" ]; then
+    export CXX=g++
+fi
+
 echo --START-IGNORE-WARNINGS
 [ ! -x autogen.sh ] || ./autogen.sh || exit 1
 autoconf || true
@@ -41,14 +51,14 @@ if command -v ccache >/dev/null; then
   if [ ! -e "$CCACHE_DIR" ]; then
     echo "$0: have ccache but cache directory does not exist: $CCACHE_DIR" 1>&2
   else
-    set -- CC='ccache gcc' CXX='ccache g++'
+    set -- CC="ccache $CC" CXX="ccache $CXX"
   fi
 else
   echo "$0: no ccache found, compiles will be slower." 1>&2
 fi
 
 NCPU=$(( 2 * `grep -c processor /proc/cpuinfo` ))
-ionice -c3 nice -n20 make -j$NCPU "$@" || exit 4
+ionice -c3 nice -n20 $BUILD_WRAPPER make -j$NCPU "$@" || exit 4
 
 # The "make -q check" probe in build.sh.example is faulty in that
 # screwups in Makefiles make it think there are no unit tests to
diff --git a/build-ceph-notcmalloc.sh b/build-ceph-notcmalloc.sh
index 107f2b8..f397b24 100755
--- a/build-ceph-notcmalloc.sh
+++ b/build-ceph-notcmalloc.sh
@@ -19,12 +19,21 @@ rm -rf .git/modules/
 /srv/git/bin/git submodule update --init
 git clean -fdx
 
+# If CC is not already defined, use gcc.
+if [ "x$CC" = "x" ]; then
+    export CC=gcc
+fi
+
+# If CXX is not already defined, use g++.
+if [ "x$CXX" = "x" ]; then
+    export CXX=g++
+fi
 
 echo --START-IGNORE-WARNINGS
 [ ! -x autogen.sh ] || ./autogen.sh || exit 1
 autoconf || true
 echo --STOP-IGNORE-WARNINGS
-[ ! -x configure ] || CFLAGS="-fno-omit-frame-pointer -g -O2" CXXFLAGS="-fno-omit-frame-pointer -g" ./configure --with-debug --with-radosgw --with-fuse --without-tcmalloc --with-libatomic-ops --with-gtk2 --with-profiler || exit 2
+[ ! -x configure ] || CFLAGS="-fno-omit-frame-pointer -g -O2 $CFLAGS" CXXFLAGS="-fno-omit-frame-pointer -g $CXXFLAGS" ./configure --with-debug --with-radosgw --with-fuse --without-tcmalloc --with-libatomic-ops --with-gtk2 --with-profiler || exit 2
 
 if [ ! -e Makefile ]; then
     echo "$0: no Makefile, aborting." 1>&2
@@ -42,14 +51,14 @@ if command -v ccache >/dev/null; then
   if [ ! -e "$CCACHE_DIR" ]; then
     echo "$0: have ccache but cache directory does not exist: $CCACHE_DIR" 1>&2
   else
-    set -- CC='ccache gcc' CXX='ccache g++'
+    set -- CC="ccache $CC" CXX="ccache $CXX"
   fi
 else
   echo "$0: no ccache found, compiles will be slower." 1>&2
 fi
 
 NCPU=$(( 2 * `grep -c processor /proc/cpuinfo` ))
-ionice -c3 nice -n20 make -j$NCPU "$@" || exit 4
+ionice -c3 nice -n20 $BUILD_WRAPPER make -j$NCPU "$@" || exit 4
 
 # The "make -q check" probe in build.sh.example is faulty in that
 # screwups in Makefiles make it think there are no unit tests to
diff --git a/build-ceph-rpm.sh b/build-ceph-rpm.sh
index 5a5fea3..fd74333 100755
--- a/build-ceph-rpm.sh
+++ b/build-ceph-rpm.sh
@@ -18,6 +18,16 @@ rm -rf .git/modules/
 /srv/git/bin/git submodule update --init
 git clean -fdx
 
+# If CC is not already defined, use gcc.
+if [ "x$CC" = "x" ]; then
+    export CC=gcc
+fi
+
+# If CXX is not already defined, use g++.
+if [ "x$CXX" = "x" ]; then
+    export CXX=g++
+fi
+
 DISTS=`cat ../../dists`
 TARGET="$(cat ../../rsync-target)"
 TARGET="$(basename $TARGET)"
@@ -67,7 +77,7 @@ if command -v ccache >/dev/null; then
   if [ ! -e "$CCACHE_DIR" ]; then
     echo "$0: have ccache but cache directory does not exist: $CCACHE_DIR" 1>&2
   else
-    set -- CC='ccache gcc' CXX='ccache g++'
+    set -- CC="ccache $CC" CXX="ccache $CXX"
   fi
 else
   echo "$0: no ccache found, compiles will be slower." 1>&2
diff --git a/build-ceph.sh b/build-ceph.sh
index 44789d9..e150629 100755
--- a/build-ceph.sh
+++ b/build-ceph.sh
@@ -18,11 +18,21 @@ rm -rf .git/modules/
 /srv/git/bin/git submodule update --init
 git clean -fdx
 
+# If CC is not already defined, use gcc.
+if [ "x$CC" = "x" ]; then
+    export CC=gcc
+fi
+
+# If CXX is not already defined, use g++.
+if [ "x$CXX" = "x" ]; then
+    export CXX=g++
+fi
+
 echo --START-IGNORE-WARNINGS
 [ ! -x autogen.sh ] || ./autogen.sh || exit 1
 autoconf || true
 echo --STOP-IGNORE-WARNINGS
-[ ! -x configure ] || CFLAGS="-fno-omit-frame-pointer -g -O2" CXXFLAGS="-fno-omit-frame-pointer -g" ./configure --with-debug --with-radosgw --with-fuse --with-tcmalloc --with-libatomic-ops --with-gtk2 --with-hadoop --with-profiler --enable-cephfs-java --with-librocksdb-static=check || exit 2
+[ ! -x configure ] || CFLAGS="-fno-omit-frame-pointer -g -O2 $CFLAGS" CXXFLAGS="-fno-omit-frame-pointer -g $CXXFLAGS" ./configure --with-debug --with-radosgw --with-fuse --with-tcmalloc --with-libatomic-ops --with-gtk2 --with-hadoop --with-profiler --enable-cephfs-java --with-librocksdb-static=check || exit 2
 
 if [ ! -e Makefile ]; then
     echo "$0: no Makefile, aborting." 1>&2
@@ -40,14 +50,14 @@ if command -v ccache >/dev/null; then
   if [ ! -e "$CCACHE_DIR" ]; then
     echo "$0: have ccache but cache directory does not exist: $CCACHE_DIR" 1>&2
   else
-    set -- CC='ccache gcc' CXX='ccache g++'
+    set -- CC="ccache $CC" CXX="ccache $CXX"
   fi
 else
   echo "$0: no ccache found, compiles will be slower." 1>&2
 fi
 
 NCPU=$(( 2 * `grep -c processor /proc/cpuinfo` ))
-ionice -c3 nice -n20 make -j$NCPU "$@" || exit 4
+ionice -c3 nice -n20 $BUILD_WRAPPER make -j$NCPU "$@" || exit 4
 
 # The "make -q check" probe in build.sh.example is faulty in that
 # screwups in Makefiles make it think there are no unit tests to
diff --git a/fabfile.py b/fabfile.py
index ffc553f..a56eb85 100644
--- a/fabfile.py
+++ b/fabfile.py
@@ -164,6 +164,8 @@ def _rh_gitbuilder(flavor, git_repo, extra_remotes={}, extra_packages=[], ignore
     _rpm_install(
         'ntp',
         'ccache',
+        'clang',
+        'clang-analyzer',
         'git',
         'logrotate',
         'rsync',
@@ -282,6 +284,7 @@ def _gitbuilder(flavor, git_repo, extra_remotes={}, extra_packages=[], ignore=[]
         'ntp',
         'build-essential',
         'ccache',
+        'clang',
         'git',
         'logrotate',
 #        'sun-java6-jdk',