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Integrate armcc into scons

Integrating armcc into scons is not an easy task. If you only modify a few environment variables of CC/CXX/AR/LINK, scons will be called with the parameters of Visual C++, such as-c becomes / c, causing armcc not to recognize it.

After spending half a day reading the source code of scons, I found in the SCons/Tool directory that each compiler has a plug-in-like tool. Visual inspection did not find armcc's tool. Writing a tool for armcc should solve this problem.

In the ToolsForFools article, you learned that you can define your own tool, as long as you put it in the project's site_scons/site_tools directory.

In order to support armcc, we create a tool of armcc in the site_scons/site_tools/armcc directory. It is troublesome to write a tool from scratch. Considering that armcc is similar to cc, copy the SCons/Tool/cc.py directly to site_scons/site_tools/armcc/__init__.py and modify it based on it.

After the following line of code

Add_common_cc_variables (env)

Add the following code:

Armcc = SCons.Tool.find_program_path (env, 'armcc.exe'); armar = SCons.Tool.find_program_path (env,' armar.exe'); armlink = SCons.Tool.find_program_path (env, 'armlink.exe') Env ['CC'] = armcc env [' CXX'] = armcc env ['AR'] = armar env [' LINK'] = armlink env ['CXXCOM'] =' $CC-o $TARGET-c $CFLAGS $CCFLAGS $_ CCCOMCOM $SOURCES' env ['ARFLAGS'] = SCons.Util.CLVar ('-create-r') env ['ARCOM'] =' $AR $ARFLAGS $TARGET $SOURCES' env [' OBJSUFFIX'] ='.o 'env [' LIBPREFIX'] = 'lib' env [' LIBSUFFIX'] ='.a'

Referring to the code in scons's Tool, in the SConstruct file, add the following code to enable the armcc we defined earlier:

Env = DefaultEnvironment (); SCons.Tool.Tool ('armcc') (env)

Compiling with scons works fine, but the following error occurs when armar generates .a files:

The command line is too long.

This is mainly due to the fact that there are too many .o files. Armar does not read parameters through @ match to the file as ar does, but armar can first create a .a file and then append .o files to it one by one.

From the source code of scons, it is found that the command is finally called in SCons/Platform/win32.py. But this is a system file, so it's not wise to modify it directly, so let's write a tool to solve this problem.

To avoid implementing it from scratch, copy the SCons/Platform/win32.py to site_scons/site_tools/win4armcc/__init__.py and then modify it.

First change the values of the following variables to:

Env ['OBJSUFFIX'] =' .o 'env [' LIBPREFIX'] = 'lib' env [' LIBSUFFIX'] ='.a'

Add an exists function

Def exists (env): return True

Reimplement the spawn function.

Def exe_ar (sh, cmd, args, env): armar = args [0] # args [1] is-create # args [2] is-r target = args [3] Objs = args [4:] for i in range (len (objs)): ARFLAGS='-r' if I = = 0: ARFLAGS='--create-r 'all_args= [armar, target, ARFLAGS, objs [I]] sargs =' .join (all_args) .replace ('\','/'); print (str (I) +':'+ sargs) Exec_spawn ([sh,'/ caching, sargs], env) def spawn (sh, escape, cmd, args, env): if cmd.endswith ('armar.exe'): exe_ar (sh, cmd, args, env); else: sargs =' .join (args) .replace ('\','/'); return exec_spawn ([sh,'/ cations, sargs], env)

Again, enable win4armcc in the SConstruct file.

SCons.Tool.Tool ('win4armcc') (env)

OK, now you can call armcc with scons.

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