Build emscripten in build-emscripten to separate cache.

.travis.yml

@@ -5,12 +5,6 @@
 #
 # http://solidity.readthedocs.org
 #
-# TODO - Merge with .travis.yml file which currently lives in the root of
-# webthree-umbrella, but actually contains the automation for the Solidity
-# Emscripten build, which will also need consolidating into here somehow.
-#
-# See https://github.com/ethereum/webthree-umbrella/blob/develop/.travis.yml
-#
 # ------------------------------------------------------------------------------
 # This file is part of cpp-ethereum.
 #
@@ -75,6 +69,7 @@ cache:
     ccache: true
     directories:
         - build
+        - build-emscripten
         - boost_1_57_0
         - jsoncpp
         - cryptopp

scripts/travis-emscripten/build_emscripten.sh

@@ -85,8 +85,8 @@ echo -en 'travis_fold:end:compiling_boost\\r'
 # Build dependent components and solidity itself
 echo -en 'travis_fold:start:compiling_solidity\\r'
 cd $WORKSPACE
-mkdir -p build
-cd build
+mkdir -p build-emscripten
+cd build-emscripten
 emcmake cmake \
   -DCMAKE_BUILD_TYPE=Release \
   -DEMSCRIPTEN=1 \
@@ -125,7 +125,6 @@ emcmake cmake \
 emmake make -j 4
 
 cd ..
-cp build/solc/soljson.js ./
-rm -rf build
+cp build-emscripten/solc/soljson.js ./
 
 echo -en 'travis_fold:end:compiling_solidity\\r'