tools/testbuild.sh: Support regular expression in blacklist

and prepend 'uname -s' to config for filtering config by host

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

tools/README.txt

@@ -1040,7 +1040,10 @@ testbuild.sh
   configured board.
 
   The prefix '-' can be used to skip a configuration:
-  -stm32f429i-disco/nsh,CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIL
+  -stm32f429i-disco/nsh
+
+  or skip a configuration on a specific host(e.g. Darwin):
+  -Darwin,sim:rpserver
 
 uncrustify.cfg
 --------------

tools/testbuild.sh

@@ -47,6 +47,23 @@ unset JOPTION
 PRINTLISTONLY=0
 GITCLEAN=0
 
+case $(uname -s) in
+  Darwin*)
+    HOST=Darwin
+    ;;
+  CYGWIN*)
+    HOST=Cygwin
+    ;;
+  MINGW32*)
+    HOST=MinGw
+    ;;
+  *)
+
+    # Assume linux as a fallback
+    HOST=Linux
+    ;;
+esac
+
 function showusage {
   echo ""
   echo "USAGE: $progname [-l|m|c|g|n] [-d] [-e <extraflags>] [-x] [-j <ncpus>] [-a <appsdir>] [-t <topdir>] [-p] [-G] <testlist-file>"
@@ -258,10 +275,15 @@ function build {
 function dotest {
   echo "===================================================================================="
   config=`echo $1 | cut -d',' -f1`
-  re="-${config/\//:}[[:space:]]"
-  if [[ "${blacklist} " =~ $re ]]; then
+  check=${HOST},${config/\//:}
+
+  for re in $blacklist; do
+    if [[ "${check}" =~ ${re:1}$ ]]; then
       echo "Skipping: $1"
-  else
+      return
+    fi
+  done
+
   echo "Configuration/Tool: $1"
   if [ ${PRINTLISTONLY} -eq 1 ]; then
     return
@@ -302,7 +324,6 @@ function dotest {
   distclean
   configure
   build
-  fi
 }
 
 # Perform the build test for each entry in the test list file