contrib: Enable -Werror by default

Change-Id: I1752cad1e34cb6e5f36edf3f538d803eff29d18c
diff --git a/contrib/jenkins-arm.sh b/contrib/jenkins-arm.sh
index d5fc31f..510b0e9 100755
--- a/contrib/jenkins-arm.sh
+++ b/contrib/jenkins-arm.sh
@@ -10,7 +10,7 @@
 	--host=arm-none-eabi \
 	--enable-embedded \
 	--disable-shared \
-	CFLAGS="-Os -ffunction-sections -fdata-sections -nostartfiles -nodefaultlibs"
+	CFLAGS="-Os -ffunction-sections -fdata-sections -nostartfiles -nodefaultlibs -Werror"
 
 $MAKE $PARALLEL_MAKE \
 	|| cat-testlogs.sh
@@ -27,7 +27,7 @@
 	--host=arm-none-eabi \
 	--enable-embedded \
 	--disable-shared \
-	CFLAGS="-Os -ffunction-sections -fdata-sections -nostartfiles -nodefaultlibs"
+	CFLAGS="-Os -ffunction-sections -fdata-sections -nostartfiles -nodefaultlibs -Werror"
 
 $MAKE $PARALLEL_MAKE \
 	|| cat-testlogs.sh
diff --git a/contrib/jenkins.sh b/contrib/jenkins.sh
index bb6c3cb..6a72840 100755
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -11,7 +11,7 @@
 fi
 
 autoreconf --install --force
-./configure --enable-static $ENABLE_SANITIZE
+./configure --enable-static $ENABLE_SANITIZE CFLAGS="-Werror" CPPFLAGS="-Werror"
 $MAKE $PARALLEL_MAKE check \
   || cat-testlogs.sh
 $MAKE distcheck \
@@ -23,7 +23,7 @@
 autoreconf --install --force
 mkdir builddir
 cd builddir
-../configure --enable-static
+../configure --enable-static CFLAGS="-Werror" CPPFLAGS="-Werror"
 $MAKE $PARALLEL_MAKE check \
   || cat-testlogs.sh
 $MAKE distcheck \