Compilation error in sagelib-9.1 / ppl-1.2 with clang 11

[thierry-FreeBSD]

When built with clang version 11.0.0, the compilation of sagelib 9.1 fails with the following message:

[sagelib-9.1] [179/510] cc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -O2 -pipe -DLIBICONV_PLUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing -DLIBICONV_PLUG -I/usr/local/include -isystem /usr/local/include -fPIC -Isage/libs -I./sage/libs/ntl -I./sage/cpython -I/usr/local/lib/python3.7/site-packages/cysignals -I/wrkdirs/usr/ports/math/sage/work/build/usr/local/include -I/wrkdirs/usr/ports/math/sage/work/sage-9.1/src -I/wrkdirs/usr/ports/math/sage/work/sage-9.1/src/sage/ext -I/usr/local/include/python3.7m -I/usr/local/lib/python3.7/site-packages/numpy/core/include -Ibuild/cythonized -I/wrkdirs/usr/ports/math/sage/work/build/usr/local/include -I/usr/local/include/python3.7m -c build/cythonized/sage/libs/ppl.cpp -o build/temp.freebsd-13.0-CURRENT-amd64-3.7/build/cythonized/sage/libs/ppl.o -fno-strict-aliasing -DCYTHON_CLINE_IN_TRACEBACK=1 -std=c++11
[sagelib-9.1] build/cythonized/sage/libs/ppl.cpp:13974:46: error: cannot initialize a parameter of type 'bool' with an rvalue of type 'nullptr_t'
[sagelib-9.1]   __pyx_v_result = __pyx_v_self->thisptr->OK(NULL);
[sagelib-9.1]                                              ^~~~
[sagelib-9.1] /usr/include/sys/_null.h:37:14: note: expanded from macro 'NULL'
[sagelib-9.1] #define NULL    nullptr
[sagelib-9.1]                 ^~~~~~~
[sagelib-9.1] /usr/local/include/ppl.hh:48056:16: note: passing argument to parameter 'check_not_empty' here
[sagelib-9.1]   bool OK(bool check_not_empty = false) const;
[sagelib-9.1]                ^
[sagelib-9.1] 1 error generated.

Note: this is on FreeBSD with external ppl-1.2 / pplpy-0.8.4.

I have not found other report of this; is it specific to FreeBSD?

Component: packages: experimental

Keywords: ppl, FreeBSD

Issue created by migration from https://trac.sagemath.org/ticket/30782

[dimpase]

comment:1

ought to be reported on https://gitlab.com/videlec/pplpy - but indeed, clang 11 is sort of rare. Perhaps this problem was fixed in the ongoing work on sage 9.2, where one has to deal with clang 12 from Apple (but it's Apple, so all bets are off)

[fchapoton]

comment:2

should we close as obsolete or just change the milestone to 9.7 ?

[mkoeppe]

comment:3

We can close it.