[Bug bootstrap/92484] In tree build of ISL 0.22 fails: requires C++11
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92484 --- Comment #5 from franz --- OK, I've now digged a little further in to this issue. According to the GCC docs for a native build a 3-stage-build is performed automatically. So with "--disable-bootstrap" the build should behave the same as the crosscompile build. I've tested it and isl builds fine with this setting. I've checked config.log from isl and yes, c++11 flags are not added in this case. However I actually don't know why this even has any influence on that. It seems that in the newest isl version they now use the M4 macro "AX_CXX_COMPILE_STDCXX_11" for the whole build. In the previous versions it was only used for "interface/isl_test_cpp", that's the reason why this problem actually came up.
[Bug bootstrap/92484] In tree build of ISL 0.22 fails: requires C++11
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92484 franz changed: What|Removed |Added CC||franz.flasch at gmx dot at --- Comment #4 from franz --- 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?
