fixed #1273, npm is not used by default

CMakeLists.txt

@@ -22,6 +22,7 @@ function(createDefaultCacheConfig)
 	set(FATDB OFF CACHE BOOL "Build with ability to list entries in the Trie. Doubles DB size, slows everything down, but good for looking at state diffs and trie contents.")
 	set(JUSTTESTS OFF CACHE BOOL "Build only for tests.")
 	set(SOLIDITY ON CACHE BOOL "Build the Solidity language components (requried unless HEADLESS)")
+	set(USENPM OFF CACHE BOOL "Use npm to recompile ethereum.js if it was changed")
 endfunction()
 
 
@@ -125,7 +126,7 @@ configureProject()
 set (ETH_HAVE_WEBENGINE 1)
 
 message(STATUS "CMAKE_VERSION: ${CMAKE_VERSION}")
-message("-- VMTRACE: ${VMTRACE}; PARANOIA: ${PARANOIA}; HEADLESS: ${HEADLESS}; JSONRPC: ${JSONRPC}; EVMJIT: ${EVMJIT}; FATDB: ${FATDB}; CHROMIUM: ${ETH_HAVE_WEBENGINE}")
+message("-- VMTRACE: ${VMTRACE}; PARANOIA: ${PARANOIA}; HEADLESS: ${HEADLESS}; JSONRPC: ${JSONRPC}; EVMJIT: ${EVMJIT}; FATDB: ${FATDB}; CHROMIUM: ${ETH_HAVE_WEBENGINE}; USENPM: ${USENPM}")
 
 
 # Default TARGET_PLATFORM to "linux".

cmake/EthDependencies.cmake

@@ -134,7 +134,9 @@ if (NOT HEADLESS)
 		message(" - windeployqt path: ${WINDEPLOYQT_APP}")
 	endif()
 
-# TODO check node && npm version
+	if (USENPM)
+
+		# TODO check node && npm version
 		find_program(ETH_NODE node)
 		string(REGEX REPLACE "node" "" ETH_NODE_DIRECTORY ${ETH_NODE})
 		message(" - nodejs location : ${ETH_NODE}")
@@ -143,6 +145,14 @@ if (NOT HEADLESS)
 		string(REGEX REPLACE "npm" "" ETH_NPM_DIRECTORY ${ETH_NPM})
 		message(" - npm location    : ${ETH_NPM}")
 
+		if (NOT ETH_NODE)
+			message(FATAL_ERROR "node not found!")
+		endif()
+		if (NOT ETH_NPM)
+			message(FATAL_ERROR "npm not found!")
+		endif()
+	endif()
+
 endif() #HEADLESS
 
 # use multithreaded boost libraries, with -mt suffix

libjsqrc/CMakeLists.txt

@@ -12,7 +12,7 @@ qt5_add_resources(JSQRC js.qrc)
 add_library(jsqrc STATIC ${JSQRC})
 target_link_libraries(jsqrc Qt5::Core)
 
-if (ETH_NODE AND ETH_NPM)
+if (USENPM)
 	add_custom_target(ethereumjs)
 	add_custom_command(TARGET ethereumjs
 		POST_BUILD