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authorKaren Arutyunov <karen@codesynthesis.com>2019-08-24 17:41:30 +0300
committerKaren Arutyunov <karen@codesynthesis.com>2019-08-28 15:01:48 +0300
commit4bdf53837e010073de802070d4e6087410662d3e (patch)
tree2820d3964877d1a7d498833da325aa3d3a699353 /libbuild2/cc/utility.cxx
parentea24f530048cbce0c5335ca3fd3632c8ce34315a (diff)
Move cc build system module to separate library
Diffstat (limited to 'libbuild2/cc/utility.cxx')
-rw-r--r--libbuild2/cc/utility.cxx114
1 files changed, 114 insertions, 0 deletions
diff --git a/libbuild2/cc/utility.cxx b/libbuild2/cc/utility.cxx
new file mode 100644
index 0000000..07f3b2e
--- /dev/null
+++ b/libbuild2/cc/utility.cxx
@@ -0,0 +1,114 @@
+// file : libbuild2/cc/utility.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#include <libbuild2/cc/utility.hxx>
+
+#include <libbuild2/file.hxx>
+#include <libbuild2/variable.hxx>
+#include <libbuild2/algorithm.hxx> // search()
+
+#include <libbuild2/bin/rule.hxx>
+#include <libbuild2/bin/target.hxx>
+
+using namespace std;
+
+namespace build2
+{
+ namespace cc
+ {
+ using namespace bin;
+
+ const dir_path module_dir ("cc");
+ const dir_path modules_sidebuild_dir (dir_path (module_dir) /= "modules");
+
+ lorder
+ link_order (const scope& bs, otype ot)
+ {
+ // Initialize to suppress 'may be used uninitialized' warning produced
+ // by MinGW GCC 5.4.0.
+ //
+ const char* var (nullptr);
+
+ switch (ot)
+ {
+ case otype::e: var = "bin.exe.lib"; break;
+ case otype::a: var = "bin.liba.lib"; break;
+ case otype::s: var = "bin.libs.lib"; break;
+ }
+
+ const auto& v (cast<strings> (bs[var]));
+ return v[0] == "shared"
+ ? v.size () > 1 && v[1] == "static" ? lorder::s_a : lorder::s
+ : v.size () > 1 && v[1] == "shared" ? lorder::a_s : lorder::a;
+ }
+
+ const target*
+ link_member (const bin::libx& x, action a, linfo li, bool exist)
+ {
+ if (x.is_a<libul> ())
+ {
+ // For libul{} that is linked to an executable the member choice
+ // should be dictated by the members of lib{} this libul{} is
+ // "primarily" for. If both are being built, then it seems natural to
+ // prefer static over shared since it could be faster (but I am sure
+ // someone will probably want this configurable).
+ //
+ if (li.type == otype::e)
+ {
+ // Utility libraries are project-local which means the primarily
+ // target should be in the same project as us.
+ //
+ li.type = lib_rule::build_members (x.root_scope ()).a
+ ? otype::a
+ : otype::s;
+ }
+
+ const target_type& tt (li.type == otype::a
+ ? libua::static_type
+ : libus::static_type);
+
+ // Called by the compile rule during execute.
+ //
+ return x.ctx.phase == run_phase::match && !exist
+ ? &search (x, tt, x.dir, x.out, x.name)
+ : search_existing (x.ctx, tt, x.dir, x.out, x.name);
+ }
+ else
+ {
+ assert (!exist);
+
+ const lib& l (x.as<lib> ());
+
+ // Make sure group members are resolved.
+ //
+ group_view gv (resolve_members (a, l));
+ assert (gv.members != nullptr);
+
+ lorder lo (li.order);
+
+ bool ls (true);
+ switch (lo)
+ {
+ case lorder::a:
+ case lorder::a_s:
+ ls = false; // Fall through.
+ case lorder::s:
+ case lorder::s_a:
+ {
+ if (ls ? l.s == nullptr : l.a == nullptr)
+ {
+ if (lo == lorder::a_s || lo == lorder::s_a)
+ ls = !ls;
+ else
+ fail << (ls ? "shared" : "static") << " variant of " << l
+ << " is not available";
+ }
+ }
+ }
+
+ return ls ? static_cast<const target*> (l.s) : l.a;
+ }
+ }
+ }
+}