From 1aef5c06a3702d7722dcd38e342eae950839cecb Mon Sep 17 00:00:00 2001 From: Nathan Binkert Date: Sat, 10 Mar 2007 23:00:54 -0800 Subject: Rework the way SCons recurses into subdirectories, making it automatic. The point is that now a subdirectory can be added to the build process just by creating a SConscript file in it. The process has two passes. On the first pass, all subdirs of the root of the tree are searched for SConsopts files. These files contain any command line options that ought to be added for a particular subdirectory. On the second pass, all subdirs of the src directory are searched for SConscript files. These files describe how to build any given subdirectory. I have added a Source() function. Any file (relative to the directory in which the SConscript resides) passed to that function is added to the build. Clean up everything to take advantage of Source(). function is added to the list of files to be built. --HG-- extra : convert_revision : 103f6b490d2eb224436688c89cdc015211c4fd30 --- SConstruct | 45 ++++++++++++++++++++++++++++----------------- 1 file changed, 28 insertions(+), 17 deletions(-) (limited to 'SConstruct') diff --git a/SConstruct b/SConstruct index 0a3d6de02..a6659fe9b 100644 --- a/SConstruct +++ b/SConstruct @@ -63,10 +63,10 @@ # ################################################### -# Python library imports import sys import os import subprocess + from os.path import join as joinpath # Check for recent-enough Python and SCons versions. If your system's @@ -182,6 +182,7 @@ for t in abs_targets: env = Environment(ENV = os.environ, # inherit user's environment vars ROOT = ROOT, SRCDIR = SRCDIR) +Export('env') #Parse CC/CXX early so that we use the correct compiler for # to test for dependencies/versions/libraries/includes @@ -363,30 +364,42 @@ if have_mysql: env = conf.Finish() # Define the universe of supported ISAs -env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips', 'x86'] +all_isa_list = [ ] +Export('all_isa_list') # Define the universe of supported CPU models -env['ALL_CPU_LIST'] = ['AtomicSimpleCPU', 'TimingSimpleCPU', - 'O3CPU', 'OzoneCPU'] - -if os.path.isdir(joinpath(SRCDIR, 'encumbered/cpu/full')): - env['ALL_CPU_LIST'] += ['FullCPU'] +all_cpu_list = [ ] +default_cpus = [ ] +Export('all_cpu_list', 'default_cpus') # Sticky options get saved in the options file so they persist from # one invocation to the next (unless overridden, in which case the new # value becomes sticky). sticky_opts = Options(args=ARGUMENTS) +Export('sticky_opts') + +# Non-sticky options only apply to the current build. +nonsticky_opts = Options(args=ARGUMENTS) +Export('nonsticky_opts') + +# Walk the tree and execute all SConsopts scripts that wil add to the +# above options +for root, dirs, files in os.walk('.'): + if 'SConsopts' in files: + SConscript(os.path.join(root, 'SConsopts')) + +all_isa_list.sort() +all_cpu_list.sort() +default_cpus.sort() + sticky_opts.AddOptions( - EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env['ALL_ISA_LIST']), + EnumOption('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list), BoolOption('FULL_SYSTEM', 'Full-system support', False), # There's a bug in scons 0.96.1 that causes ListOptions with list # values (more than one value) not to be able to be restored from # a saved option file. If this causes trouble then upgrade to # scons 0.96.90 or later. - ListOption('CPU_MODELS', 'CPU models', 'AtomicSimpleCPU,TimingSimpleCPU,O3CPU', - env['ALL_CPU_LIST']), - BoolOption('ALPHA_TLASER', - 'Model Alpha TurboLaser platform (vs. Tsunami)', False), + ListOption('CPU_MODELS', 'CPU models', default_cpus, all_cpu_list), BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False), BoolOption('EFENCE', 'Link with Electric Fence malloc debugger', False), @@ -408,8 +421,6 @@ sticky_opts.AddOptions( '%s:%s' % (sys.prefix, sys.exec_prefix)) ) -# Non-sticky options only apply to the current build. -nonsticky_opts = Options(args=ARGUMENTS) nonsticky_opts.AddOptions( BoolOption('update_ref', 'Update test reference outputs', False) ) @@ -514,6 +525,7 @@ env.SConscript('ext/libelf/SConscript', # ################################################### +env['ALL_ISA_LIST'] = all_isa_list def make_switching_dir(dirname, switch_headers, env): # Generate the header. target[0] is the full path of the output # header to generate. 'source' is a dummy variable, since we get the @@ -524,7 +536,7 @@ def make_switching_dir(dirname, switch_headers, env): f = open(fname, 'w') f.write('#include "arch/isa_specific.hh"\n') cond = '#if' - for isa in env['ALL_ISA_LIST']: + for isa in all_isa_list: f.write('%s THE_ISA == %s_ISA\n#include "%s/%s/%s"\n' % (cond, isa.upper(), dirname, isa, basename)) cond = '#elif' @@ -545,8 +557,7 @@ def make_switching_dir(dirname, switch_headers, env): # Instantiate actions for each header for hdr in switch_headers: env.Command(hdr, [], switch_hdr_action) - -env.make_switching_dir = make_switching_dir +Export('make_switching_dir') ################################################### # -- cgit v1.2.3