[Bug bootstrap/92484] In tree build of ISL 0.22 fails: requires C++11

[franz.flasch at gmx dot at]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92484

franz <franz.flasch at gmx dot at> changed:

           What    |Removed                     |Added
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                 CC|                            |franz.flasch at gmx dot at

--- Comment #4 from franz <franz.flasch at gmx dot at> ---
It seems this issue only occurs if the host machine and the target machine are
identical, as it does not occur when crosscompilers are built.

E.g. when building a crosscompiler for arm isl builds just fine. I checked the
config.status and it seems that the c++11 compiler flag is not being set in
case of a crosscompiler build:

CXX variable for arm crosscompiler build in config.log:
CXX='g++'

CXX variable for x86_64 native compiler build in config.log:
CXX='g++ -std=gnu++98 -std=c++11'


Is there any way of telling the buildprocess to not use those c++11 compiler
flag for isl?