Unable to create header unit for gtkmm4

Question

Trying to create gtkmm 4 header unit using g++ 15 with:

g++ -std=c++23 -fmodules -fsearch-include-path -fmodule-header gtkmm.h  `pkg-config --cflags gtkmm-4.0`

I get the following error:

/usr/include/gtkmm-4.0/gtkmm.h: internal compiler error: in core_vals, at cp/module.cc:6641
0x1f3713b internal_error(char const*, ...)
    ../../gcc-15.1.0/gcc/diagnostic-global-context.cc:517

Have I done something incorrectly or is there a workaround for this possible compiler bug?

An internal compiler error is always a compiler bug. Even if there's some error in the actual code, the compiler itself shouldn't crash. — Nicol Bolas
– Nicol Bolas, Commented Jun 27 at 1:37

programmer · Accepted Answer · 2025-08-09 11:49:16Z

0

Good news.

Now with g++ released today (aug 8, 2025) version 15.2, gtkmm 4.0 header unit compile without errors!

edited Aug 9 at 11:49

answered Aug 8 at 17:13

programmer

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