oeqa sdk cases: Skip SDK test cases when TCLIBC is newlib

diff --git a/meta/lib/oeqa/sdk/cases/autotools.py b/meta/lib/oeqa/sdk/cases/autotools.py
index 848e9392ec..4bac28f04d 100644
--- a/meta/lib/oeqa/sdk/cases/autotools.py
+++ b/meta/lib/oeqa/sdk/cases/autotools.py
@@ -7,6 +7,7 @@ 
 import os
 import tempfile
 import subprocess
+import unittest
 
 from oeqa.sdk.case import OESDKTestCase
 from oeqa.utils.subprocesstweak import errors_have_output
@@ -16,6 +17,11 @@  class AutotoolsTest(OESDKTestCase):
     """
     Check that autotools will cross-compile correctly.
     """
+    def setUp(self):
+        libc = self.td.get("TCLIBC")
+        if libc in [ 'newlib' ]:
+            raise unittest.SkipTest("AutotoolsTest class: SDK doesn't contain a supported C library")
+
     def test_cpio(self):
         with tempfile.TemporaryDirectory(prefix="cpio-", dir=self.tc.sdk_dir) as testdir:
             tarball = self.fetch(testdir, self.td["DL_DIR"], "https://ftp.gnu.org/gnu/cpio/cpio-2.15.tar.gz")
diff --git a/meta/lib/oeqa/sdk/cases/cmake.py b/meta/lib/oeqa/sdk/cases/cmake.py
index db7d826a38..cb0944ee99 100644
--- a/meta/lib/oeqa/sdk/cases/cmake.py
+++ b/meta/lib/oeqa/sdk/cases/cmake.py
@@ -19,6 +19,10 @@  class CMakeTest(OESDKTestCase):
     """
 
     def setUp(self):
+        libc = self.td.get("TCLIBC")
+        if libc in [ 'newlib' ]:
+            raise unittest.SkipTest("CMakeTest class: SDK doesn't contain a supported C library")
+
         if not (self.tc.hasHostPackage("nativesdk-cmake") or
                 self.tc.hasHostPackage("cmake-native")):
             raise unittest.SkipTest("CMakeTest: needs cmake")
diff --git a/meta/lib/oeqa/sdk/cases/gcc.py b/meta/lib/oeqa/sdk/cases/gcc.py
index fc28b9c3d4..e810d2c42b 100644
--- a/meta/lib/oeqa/sdk/cases/gcc.py
+++ b/meta/lib/oeqa/sdk/cases/gcc.py
@@ -26,6 +26,10 @@  class GccCompileTest(OESDKTestCase):
                     os.path.join(self.tc.sdk_dir, f))
 
     def setUp(self):
+        libc = self.td.get("TCLIBC")
+        if libc in [ 'newlib' ]:
+            raise unittest.SkipTest("GccCompileTest class: SDK doesn't contain a supported C library")
+
         machine = self.td.get("MACHINE")
         if not (self.tc.hasHostPackage("packagegroup-cross-canadian-%s" % machine) or
                 self.tc.hasHostPackage("^gcc-", regex=True)):
diff --git a/meta/lib/oeqa/sdk/cases/gtk3.py b/meta/lib/oeqa/sdk/cases/gtk3.py
index c329c4bb86..8f60d5e7da 100644
--- a/meta/lib/oeqa/sdk/cases/gtk3.py
+++ b/meta/lib/oeqa/sdk/cases/gtk3.py
@@ -18,6 +18,10 @@  class GTK3Test(OESDKTestCase):
     Test that autotools and GTK+ 3 compiles correctly.
     """
     def setUp(self):
+        libc = self.td.get("TCLIBC")
+        if libc in [ 'newlib' ]:
+            raise unittest.SkipTest("GTK3Test class: SDK doesn't contain a supported C library")
+
         if not (self.tc.hasTargetPackage("gtk+3", multilib=True) or \
                 self.tc.hasTargetPackage("libgtk-3.0", multilib=True)):
             raise unittest.SkipTest("GalculatorTest class: SDK don't support gtk+3")
diff --git a/meta/lib/oeqa/sdk/cases/makefile.py b/meta/lib/oeqa/sdk/cases/makefile.py
index 2ff54ce25f..e1e2484820 100644
--- a/meta/lib/oeqa/sdk/cases/makefile.py
+++ b/meta/lib/oeqa/sdk/cases/makefile.py
@@ -5,6 +5,7 @@ 
 #
 
 import os, tempfile, subprocess
+import unittest
 from oeqa.sdk.case import OESDKTestCase
 from oeqa.utils.subprocesstweak import errors_have_output
 errors_have_output()
@@ -13,6 +14,11 @@  class MakefileTest(OESDKTestCase):
     """
     Test that "plain" compilation works, using just $CC $CFLAGS etc.
     """
+    def setUp(self):
+        libc = self.td.get("TCLIBC")
+        if libc in [ 'newlib' ]:
+            raise unittest.SkipTest("MakefileTest class: SDK doesn't contain a supported C library")
+
     def test_lzip(self):
         with tempfile.TemporaryDirectory(prefix="lzip", dir=self.tc.sdk_dir) as testdir:
             tarball = self.fetch(testdir, self.td["DL_DIR"], "http://downloads.yoctoproject.org/mirror/sources/lzip-1.19.tar.gz")
diff --git a/meta/lib/oeqa/sdk/cases/meson.py b/meta/lib/oeqa/sdk/cases/meson.py
index be53df204a..1edf78720a 100644
--- a/meta/lib/oeqa/sdk/cases/meson.py
+++ b/meta/lib/oeqa/sdk/cases/meson.py
@@ -18,6 +18,10 @@  class MesonTest(OESDKTestCase):
     Test that Meson builds correctly.
     """
     def setUp(self):
+        libc = self.td.get("TCLIBC")
+        if libc in [ 'newlib' ]:
+            raise unittest.SkipTest("MesonTest class: SDK doesn't contain a supported C library")
+
         if not (self.tc.hasHostPackage("nativesdk-meson") or
                 self.tc.hasHostPackage("meson-native")):
             raise unittest.SkipTest("MesonTest: needs meson")