Source of the problem is missing type declaration from, can be fixed with something like -D_POSIX_C_SOURCE=200809L or -std=gnu1x. Reproducible: Always
Created attachment 409884 [details] build.log
Please try with the latest masked version of chromium.
Created attachment 409886 [details] build.log.xz
>try with the latest masked version of chromium Yes, 46.0.2486.0 builds fine.
Closing then. An even more recent version, 47, is now stable.