Hi, I just rediscovered this issue by adding “gcc-7” to a package’s input without also adjusting the variable that determines the order of includes. (I ended up not needing to use GCC 7 in the end.)
Seeing that issue #42392 (“GCC includes ordering issue? g++: error: 'round' is not a member of 'std'”) has since been solved, should we close this issue, too? Or are there still reasons to want an adjustment of the gnu-build-system? What do you think, Miguel? -- Ricardo