diff --git a/poky/meta/classes/sanity.bbclass b/poky/meta/classes/sanity.bbclass
index 63ab6cf..9e87101 100644
--- a/poky/meta/classes/sanity.bbclass
+++ b/poky/meta/classes/sanity.bbclass
@@ -2,7 +2,7 @@
 # Sanity check the users setup for common misconfigurations
 #
 
-SANITY_REQUIRED_UTILITIES ?= "patch diffstat makeinfo git bzip2 tar \
+SANITY_REQUIRED_UTILITIES ?= "patch diffstat git bzip2 tar \
     gzip gawk chrpath wget cpio perl file which"
 
 def bblayers_conf_file(d):
@@ -511,14 +511,38 @@
     return None
 
 
-# Check if we're running on WSL (Windows Subsystem for Linux). Its known not to
-# work but we should tell the user that upfront.
+# Check if we're running on WSL (Windows Subsystem for Linux).
+# WSLv1 is known not to work but WSLv2 should work properly as
+# long as the VHDX file is optimized often, let the user know
+# upfront.
+# More information on installing WSLv2 at:
+# https://docs.microsoft.com/en-us/windows/wsl/wsl2-install
 def check_wsl(d):
     with open("/proc/version", "r") as f:
         verdata = f.readlines()
     for l in verdata:
         if "Microsoft" in l:
-            return "OpenEmbedded doesn't work under WSL at this time, sorry"
+            return "OpenEmbedded doesn't work under WSLv1, please upgrade to WSLv2 if you want to run builds on Windows"
+        elif "microsoft" in l:
+            bb.warn("You are running bitbake under WSLv2, this works properly but you should optimize your VHDX file eventually to avoid running out of storage space")
+    return None
+
+# Require at least gcc version 5.0.
+#
+# This can be fixed on CentOS-7 with devtoolset-6+
+# https://www.softwarecollections.org/en/scls/rhscl/devtoolset-6/
+#
+# A less invasive fix is with scripts/install-buildtools (or with user
+# built buildtools-extended-tarball)
+#
+def check_gcc_version(sanity_data):
+    from distutils.version import LooseVersion
+    import subprocess
+    
+    build_cc, version = oe.utils.get_host_compiler_version(sanity_data)
+    if build_cc.strip() == "gcc":
+        if LooseVersion(version) < LooseVersion("5.0"):
+            return "Your version of gcc is older than 5.0 and will break builds. Please install a newer version of gcc (you could use the project's buildtools-extended-tarball or use scripts/install-buildtools).\n"
     return None
 
 # Tar version 1.24 and onwards handle overwriting symlinks correctly
@@ -532,10 +556,8 @@
     except subprocess.CalledProcessError as e:
         return "Unable to execute tar --version, exit code %d\n%s\n" % (e.returncode, e.output)
     version = result.split()[3]
-    if LooseVersion(version) < LooseVersion("1.24"):
-        return "Your version of tar is older than 1.24 and has bugs which will break builds. Please install a newer version of tar (1.28+).\n"
     if LooseVersion(version) < LooseVersion("1.28"):
-        return "Your version of tar is older than 1.28 and does not have the support needed to enable reproducible builds. Please install a newer version of tar (you could use the projects buildtools-tarball from our last release).\n"
+        return "Your version of tar is older than 1.28 and does not have the support needed to enable reproducible builds. Please install a newer version of tar (you could use the project's buildtools-tarball from our last release or use scripts/install-buildtools).\n"
     return None
 
 # We use git parameters and functionality only found in 1.7.8 or later
@@ -634,6 +656,7 @@
     except ImportError as e:
         status.addresult('Your Python 3 is not a full install. Please install the module %s (see the Getting Started guide for further information).\n' % e.name)
 
+    status.addresult(check_gcc_version(d))
     status.addresult(check_make_version(d))
     status.addresult(check_patch_version(d))
     status.addresult(check_tar_version(d))
@@ -806,7 +829,7 @@
     # If SDK_VENDOR looks like "-my-sdk" then the triples are badly formed so fail early
     sdkvendor = d.getVar("SDK_VENDOR")
     if not (sdkvendor.startswith("-") and sdkvendor.count("-") == 1):
-        status.addresult("SDK_VENDOR should be of the form '-foosdk' with a single dash\n")
+        status.addresult("SDK_VENDOR should be of the form '-foosdk' with a single dash; found '%s'\n" % sdkvendor)
 
     check_supported_distro(d)
 
@@ -929,7 +952,7 @@
     last_tmpdir = ""
     last_sstate_dir = ""
     last_nativelsbstr = ""
-    sanityverfile = sanity_data.expand("${TOPDIR}/conf/sanity_info")
+    sanityverfile = sanity_data.expand("${TOPDIR}/cache/sanity_info")
     if os.path.exists(sanityverfile):
         with open(sanityverfile, 'r') as f:
             for line in f: