diff options
Diffstat (limited to 'libbuild2/cc/utility.cxx')
| -rw-r--r-- | libbuild2/cc/utility.cxx | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libbuild2/cc/utility.cxx b/libbuild2/cc/utility.cxx index 283e1b4..ffe3e03 100644 --- a/libbuild2/cc/utility.cxx +++ b/libbuild2/cc/utility.cxx @@ -17,5 +17,58 @@ namespace build2 const dir_path module_build_dir (dir_path (module_dir) /= "build"); const dir_path module_build_modules_dir ( dir_path (module_build_dir) /= "modules"); + + void + normalize_header (path& f) + { + // Interestingly, on most paltforms and with most compilers (Clang on + // Linux being a notable exception) most system/compiler headers are + // already normalized. + // + path_abnormality a (f.abnormalities ()); + if (a != path_abnormality::none) + { + // While we can reasonably expect this path to exit, things do go + // south from time to time (like compiling under wine with file + // wlantypes.h included as WlanTypes.h). + // + try + { + // If we have any parent components, then we have to verify the + // normalized path matches realized. + // + path r; + if ((a & path_abnormality::parent) == path_abnormality::parent) + { + r = f; + r.realize (); + } + + try + { + f.normalize (); + + // Note that we might still need to resolve symlinks in the + // normalized path. + // + if (!r.empty () && f != r && path (f).realize () != r) + f = move (r); + } + catch (const invalid_path&) + { + assert (!r.empty ()); // Shouldn't have failed if no `..`. + f = move (r); // Fallback to realize. + } + } + catch (const invalid_path&) + { + fail << "invalid header path '" << f.string () << "'"; + } + catch (const system_error& e) + { + fail << "invalid header path '" << f.string () << "': " << e; + } + } + } } } |