diff options
Diffstat (limited to 'SConstruct')
| -rw-r--r-- | SConstruct | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/SConstruct b/SConstruct index 59d40d5cc..d047f99d3 100644 --- a/SConstruct +++ b/SConstruct @@ -461,6 +461,46 @@ env.SConscript('ext/libelf/SConscript', ################################################### # +# This function is used to set up a directory with switching headers +# +################################################### + +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 + # list of ISAs from env['ALL_ISA_LIST']. + def gen_switch_hdr(target, source, env): + fname = str(target[0]) + basename = os.path.basename(fname) + f = open(fname, 'w') + f.write('#include "arch/isa_specific.hh"\n') + cond = '#if' + for isa in env['ALL_ISA_LIST']: + f.write('%s THE_ISA == %s_ISA\n#include "%s/%s/%s"\n' + % (cond, isa.upper(), dirname, isa, basename)) + cond = '#elif' + f.write('#else\n#error "THE_ISA not set"\n#endif\n') + f.close() + return 0 + + # String to print when generating header + def gen_switch_hdr_string(target, source, env): + return "Generating switch header " + str(target[0]) + + # Build SCons Action object. 'varlist' specifies env vars that this + # action depends on; when env['ALL_ISA_LIST'] changes these actions + # should get re-executed. + switch_hdr_action = Action(gen_switch_hdr, gen_switch_hdr_string, + varlist=['ALL_ISA_LIST']) + + # Instantiate actions for each header + for hdr in switch_headers: + env.Command(hdr, [], switch_hdr_action) + +env.make_switching_dir = make_switching_dir + +################################################### +# # Define build environments for selected configurations. # ################################################### @@ -566,6 +606,7 @@ for build_path in build_paths: Help(help_text) + ################################################### # # Let SCons do its thing. At this point SCons will use the defined |