On Wed, 21 Jan 2026 at 21:25, Robert Haas <[email protected]> wrote: > > On Tue, Jan 20, 2026 at 10:43 AM Peter Eisentraut <[email protected]> > wrote: > > tests: Add a test C++ extension module > > This patch caused my usual build process to fail. I have been setting > CC='ccache clang' in my environment, and I was able to fix make it > work again by also setting CXX='ccache clang'. Before that, I was > getting my macPorts version of clang (21.1.2) for C source files but > the OS version of clang (15.0.0) for c++ files. But I still don't > really understand how that caused this failure, which doesn't look > like it has anything to do with mixing compilers:
Seems like the same error as Peter Smith. So I guess clang 15 doesn't use C++11 by default. Did you try if my proposed patch solves it? Another way of fixing your problem would have been: CXX='/path/to/os-version/clang -std=gnu++11'
