diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2021-05-13 15:38:53 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2021-05-13 15:38:53 +0200 |
commit | 23827edd998db30dd1f0d6a14f09399aa7d07b69 (patch) | |
tree | ad5d7669b167efde8e01894c72d091196f58bcdf /libbuild2/cc/link-rule.cxx | |
parent | d92ea3a7cff0dae578005a914df799e1e11efc8e (diff) |
Add ${c,cxx}.find_system_{header,library}() functions
Diffstat (limited to 'libbuild2/cc/link-rule.cxx')
-rw-r--r-- | libbuild2/cc/link-rule.cxx | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/libbuild2/cc/link-rule.cxx b/libbuild2/cc/link-rule.cxx index 96e243d..05a4da8 100644 --- a/libbuild2/cc/link-rule.cxx +++ b/libbuild2/cc/link-rule.cxx @@ -34,6 +34,137 @@ namespace build2 using namespace bin; using build2::to_string; + optional<path> link_rule:: + find_system_library (const strings& l) const + { + assert (!l.empty ()); + + // Figure out what we are looking for. + // + // See similar code in process_libraries(). + // + // @@ TODO: should we take the link order into account (but do we do + // this when we link system libraries)? + // + string n1, n2; + { + auto i (l.begin ()), e (l.end ()); + + string s (*i); + + if (tsys == "win32-msvc") + { + if (s[0] == '/') + { + // Some option (e.g., /WHOLEARCHIVE:<name>). Fall through to fail. + } + else + { + // Presumably a complete name. + // + n1 = move (s); + i++; + } + } + else + { + if (s[0] == '-') + { + // -l<name>, -l <name> + // + if (s[1] == 'l') + { + if (s.size () == 2) // -l <name> + { + if (i + 1 != e) + s = *++i; + else + s.clear (); + } + else // -l<name> + s.erase (0, 2); + + if (!s.empty ()) + { + i++; + + // Here we need to be consistent with search_library(). Maybe + // one day we should generalize it to be usable here (though + // here we don't need library name guessing). + // + const char* p (""); + const char* e1 (nullptr); + const char* e2 (nullptr); + + if (tclass == "windows") + { + if (tsys == "mingw32") + { + p = "lib"; + e1 = ".dll.a"; + e2 = ".a"; + } + else + { + e1 = ".dll.lib"; + e2 = ".lib"; + } + } + else + { + p = "lib"; + e1 = (tclass == "macos" ? ".dylib" : ".so"); + e2 = ".a"; + } + + n1 = p + s + e1; + n2 = e2 != nullptr ? p + s + e2 : string (); + } + } +#if 0 + // -framework <name> (Mac OS) + // + else if (tsys == "darwin" && l == "-framework") + { + // @@ TODO: maybe one day. + } +#endif + else + { + // Some other option (e.g., -Wl,--whole-archive). Fall through + // to fail. + } + } + else + { + // Presumably a complete name. + // + n1 = move (s); + i++; + } + } + + if (i != e) + fail << "unexpected library name '" << *i << "'"; + } + + path p; // Reuse the buffer. + for (const dir_path& d: sys_lib_dirs) + { + auto exists = [&p, &d] (const string& n) + { + return file_exists ((p = d, p /= n), + true /* follow_symlinks */, + true /* ignore_errors */); + }; + + if (exists (n1) || (!n2.empty () && exists (n2))) + return p; + } + + return nullopt; + } + link_rule:: link_rule (data&& d) : common (move (d)), |