Ran in to this issue when trying to update gcc in cenbuild on Fedora 34. Running 'rebuild' results in a build failure, and when looking in /home/cendio/cenbuild/repo/rpmbuild/build.log I see this error: > ../../gcc/reload1.c: In function 'void init_reload()': > ../../gcc/reload1.c:115:24: error: use of an operand of type 'bool' in 'operator++' is forbidden in C++17 > 115 | (this_target_reload->x_spill_indirect_levels) > | ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ This error will likely happen on all distributions where we try to run .c-files with a too high version of C++. How to reproduce: 1. Update gcc in cenbuild 2. Run 'rebuild'
This simple fix seems to be sufficient to resolve things: diff --git a/build/gcc.spec b/build/gcc.spec index 1c1d8cd..8595ede 100644 --- a/build/gcc.spec +++ b/build/gcc.spec @@ -298,6 +298,10 @@ if [ "%{_cendio_host}" == "%{_cendio_target}" ]; then fi %endif +%if 0%{?prebootstrap} || 0%{?bootstrap} +export CXXFLAGS="$CXXFLAGS -std=c++11" +%endif + # We don't use %%{_cendio_configure} as gcc does its own magic with # regard to libdir. This is also how Red Hat configures their gcc. %{cbrun} ../configure \
