https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92484
Bug ID: 92484
Summary: In tree build of ISL 0.22 fails: requires C++11
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: romain.geissler at amadeus dot com
Target Milestone: ---
Hi,
ISL 0.22 was released recently, and I tried to use it in builds of gcc 8, 9 and
10. It fails on all these three branches will millions of error, the first ones
being:
In file included from
/home/jenkins/workspace/OTF_Toolchain_release_4.0/output/build/temporary-system/install/include/c++/8.3.1/type_traits:35,
from /workdir/src/gcc-8.3.1/isl/include/isl/cpp.h:34,
from /workdir/src/gcc-8.3.1/isl/isl_test_cpp.cc:16:
/home/jenkins/workspace/OTF_Toolchain_release_4.0/output/build/temporary-system/install/include/c++/8.3.1/bits/c++0x_warning.h:32:2:
error: #error This file requires compiler and library support for the ISO C++
2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11
compiler options.
#error This file requires compiler and library support \
^~~~~
In file included from /workdir/src/gcc-8.3.1/isl/isl_test_cpp.cc:16:
/workdir/src/gcc-8.3.1/isl/include/isl/cpp.h: In member function 'isl_ctx*
isl::ctx::release()':
/workdir/src/gcc-8.3.1/isl/include/isl/cpp.h:57:8: error: 'tmp' does not name a
type; did you mean 'tm'?
auto tmp = ptr;
^~~
tm
/workdir/src/gcc-8.3.1/isl/include/isl/cpp.h:58:9: error: 'nullptr' was not
declared in this scope
ptr = nullptr;
^~~~~~~
/workdir/src/gcc-8.3.1/isl/include/isl/cpp.h:59:10: error: 'tmp' was not
declared in this scope
return tmp;
^~~
Obviously the problem is that isl seems to require C++11 now, and gcc is being
built with C++98.
Is there any official way to build gcc with another C++ standard by default ?
And is in-tree build of libs like gmp/mpfr/mpc/isl still supported or
officially declared deprecated and shall not be used anymore ?
Cheers,
Romain
