Merge remote-tracking branch 'origin/releases/gcc-11' into devel/omp/gcc-11

Merge up to 2e4e16f75e637d6486d0fdbb8c6ab13701238a55 (Aug 12, 2021)

diff --cc gcc/config.in
Simple merge

diff --cc gcc/configure
Simple merge

diff --cc gcc/configure.ac
Simple merge

diff --cc gcc/cp/cp-tree.h
Simple merge

diff --cc gcc/cp/decl.c
Simple merge

diff --cc gcc/cp/parser.c
Simple merge

diff --cc gcc/fortran/match.c
Simple merge

diff --cc gcc/fortran/resolve.c
Simple merge