tcwg-llvm-build.sh: Adding new toolchain parameter

This new parameter allows us to choose a toolchain to use to build LLVM.
This can either be an upstream release (from llvm.org/releases) or
internal ones stored in dev-01, so we can do stage 2 builds.

A similar patch in configs is being submitted to cope with the
new parameter.

Change-Id: Ic8d440e21ea22ebd611d431d4b99b558b36bdee4

1 files changed, 39 insertions, 1 deletions

diff --git a/tcwg-llvm-build.sh b/tcwg-llvm-build.sh
index 8b0076db..912f376e 100755
--- a/tcwg-llvm-build.sh
+++ b/tcwg-llvm-build.sh
@@ -16,7 +16,8 @@ SYN_BUILDDIR="--builddir=path/to/build"
 SYN_INSTDIR="--instdir=path/to/install"
 SYN_BUILDJOBS="--buildjobs=N (def. CPUS)"
 SYN_LINKJOBS="--linkjobs=N (def. RAM+1)"
-SYNTAX="$0 $SYN_BUILD $SYN_ASSERTS $SYN_RELEASETYPE $SYN_SRCDIR $SYN_BUILDDIR $SYN_INSTDIR $SYN_LINKJOBS $SYN_BUILDJOBS"
+SYN_TOOLCHAIN="--toolchain=http://url/for/tarball"
+SYNTAX="$0 $SYN_BUILD $SYN_ASSERTS $SYN_RELEASETYPE $SYN_SRCDIR $SYN_BUILDDIR $SYN_INSTDIR $SYN_LINKJOBS $SYN_BUILDJOBS $STN_TOOLCHAIN"
 
 # Environment Variables and default values
 GEN="Unix Makefiles"
@@ -29,6 +30,7 @@ BUILDDIR=""
 INSTDIR=""
 BUILDJOBS=$CPUS
 LINKJOBS=$(free -g | awk '/Mem/ {print $2}')
+TOOLCHAIN=""
 # We don't want more link jobs than CPUs, even if there's plenty of RAM
 if [ "$LINKJOBS" -ge "$CPUS" ]; then
   LINKJOBS=$CPUS
@@ -113,6 +115,39 @@ while [ "$#" -gt 0 ]; do
           exit 1
         fi
         shift ;;
+      --toolchain)
+        if [ "$VAL" != "" ]; then
+          file=$(basename "$VAL")
+          dir=$(echo "$file" | sed 's/\.tar.*//g')
+          # Download the toolchain
+          if [ ! -d "$WORKSPACE/$dir" ]; then
+            echo "No dir '$WORKSPACE/$dir'..."
+            if [ ! -f "$WORKSPACE/$file" ]; then
+              echo "No file '$WORKSPACE/$file'..."
+              echo "Downloading from '$VAL'"
+              wget -q "$VAL" -O "$WORKSPACE/$file"
+            fi
+            echo "Unpacking '$WORKSPACE/$file'"
+            tar xf "$WORKSPACE/$file" -C "$WORKSPACE"
+          fi
+          # Clang or GCC?
+          if [ -f "$WORKSPACE/$dir/bin/clang" ]; then
+            export CC="$WORKSPACE/$dir/bin/clang"
+            export CXX="$WORKSPACE/$dir/bin/clang++"
+          elif [ -f "$WORKSPACE/$dir/bin/gcc" ]; then
+            export CC="$WORKSPACE/$dir/bin/gcc"
+            export CXX="$WORKSPACE/$dir/bin/g++"
+          else
+            echo "ERROR: Toolchain '$VAL' has no known compiler in $dir/bin"
+            echo "Syntax: $SYN_TOOLCHAIN"
+            exit 1
+          fi
+        else
+          echo "ERROR: Toolchain '$VAL' not valid"
+          echo "Syntax: $SYN_LINKJOBS"
+          exit 1
+        fi
+        shift ;;
       *)
         echo "ERROR: Invalid argument '$1'"
         echo "Syntax: $SYNTAX"
@@ -169,6 +204,9 @@ echo "BUILDDIR = $BUILDDIR"
 echo "INSTDIR = $INSTDIR"
 echo "BUILDJOBS = $BUILDJOBS"
 echo "LINKJOBS = $LINKJOBS"
+echo "TOOLCHAIN = $TOOLCHAIN"
+echo "CC = $CC"
+echo "CXX = $CXX"
 
 # Logs
 LOGBASE="$SRCDIR/../tcwg-llvm"