tcwg-llvm-*: Add compiler option, setting CC/CXX

In addition to an external toolchain, we also want to control which
system compiler is to be used. If an option is passed, that will be the
set into CC/CXX and used by the scripts in the same way an external
toolchain would.

Change-Id: I25366c6c3c725ead1667d7b8828b1100e5e925d3

1 files changed, 25 insertions, 0 deletions

diff --git a/tcwg-llvm-common.sh b/tcwg-llvm-common.sh
index 6ec362e1..7eaec6db 100755
--- a/tcwg-llvm-common.sh
+++ b/tcwg-llvm-common.sh
@@ -13,7 +13,13 @@ download_toolchain() {
     echo "WARNING: No toolchain specified, using the system one"
     return 0
   fi
+  if [ "${CC+set}" = "set" ] || [ "${CXX+set}" = "set" ]; then
+    echo "ERROR: Duplicating CC/CXX setup"
+    exit 1
+  fi
   # Basename/dir
+  local FILE
+  local DIR
   FILE=$(basename "$TOOLCHAIN")
   DIR=${FILE//\.tar.*//}
   # Download the toolchain
@@ -49,6 +55,25 @@ download_toolchain() {
   fi
 }
 
+# Set the compiler based on the name (clang/gcc)
+set_compiler () {
+  local VAL="$1"
+  if [ "${CC+set}" = "set" ] || [ "${CXX+set}" = "set" ]; then
+    echo "ERROR: Duplicating CC/CXX setup"
+    exit 1
+  fi
+  if [ "$VAL" = "clang" ]; then
+    export CC="clang"
+    export CXX="clang++"
+  elif [ "$VAL" = "gcc" ]; then
+    export CC="gcc"
+    export CXX="g++"
+  else
+    echo "ERROR: Unknown compiler '$VAL'"
+    exit 1
+  fi
+}
+
 # Find the closest git hash for the SVN revision
 update_git() {
   local BASE=$1