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-rw-r--r--build2/cxx/init.cxx7
1 files changed, 4 insertions, 3 deletions
diff --git a/build2/cxx/init.cxx b/build2/cxx/init.cxx
index 89c7c11..32ba8b6 100644
--- a/build2/cxx/init.cxx
+++ b/build2/cxx/init.cxx
@@ -150,12 +150,13 @@ namespace build2
}
case compiler_id::gcc:
{
- // Enable starting with GCC 8.0.0.
+ // Enable starting with GCC 8.0.0 (currently the c++-modules
+ // branch).
//
- if (mj >= 8)
+ if (mj >= 8 &&
+ ci.version.build.find ("cxx-modules") != string::npos)
{
r.push_back ("-fmodules");
- //r.push_back ("-D__cpp_modules=201704"); // p0629r0
modules = true;
}
break;