Source code for SCons.Scanner.Prog

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"""Dependency scanner for program files."""

import SCons.Node
import SCons.Node.FS
import SCons.Scanner
import SCons.Util

# global, set by --debug=findlibs
print_find_libs = None

[docs]def ProgramScanner(**kw): """Return a prototype Scanner instance for scanning executable files for static-lib dependencies""" kw['path_function'] = SCons.Scanner.FindPathDirs('LIBPATH') ps = SCons.Scanner.Base(scan, "ProgramScanner", **kw) return ps
[docs]def _subst_libs(env, libs): """Substitute environment variables and split into list.""" if SCons.Util.is_String(libs): libs = env.subst(libs) if SCons.Util.is_String(libs): libs = libs.split() elif SCons.Util.is_Sequence(libs): _libs = [] for l in libs: _libs += _subst_libs(env, l) libs = _libs else: # libs is an object (Node, for example) libs = [libs] return libs
[docs]def scan(node, env, libpath = ()): """Scans program files for static-library dependencies. It will search the LIBPATH environment variable for libraries specified in the LIBS variable, returning any files it finds as dependencies. """ try: libs = env['LIBS'] except KeyError: # There are no LIBS in this environment, so just return a null list: return [] libs = _subst_libs(env, libs) try: prefix = env['LIBPREFIXES'] if not SCons.Util.is_List(prefix): prefix = [ prefix ] except KeyError: prefix = [ '' ] try: suffix = env['LIBSUFFIXES'] if not SCons.Util.is_List(suffix): suffix = [ suffix ] except KeyError: suffix = [ '' ] pairs = [] for suf in map(env.subst, suffix): for pref in map(env.subst, prefix): pairs.append((pref, suf)) result = [] if callable(libpath): libpath = libpath() find_file = SCons.Node.FS.find_file adjustixes = SCons.Util.adjustixes for lib in libs: if SCons.Util.is_String(lib): for pref, suf in pairs: l = adjustixes(lib, pref, suf) l = find_file(l, libpath, verbose=print_find_libs) if l: result.append(l) else: result.append(lib) return result
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