[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #16 from Jonathan Wakely --- (In reply to Jonathan Wakely from comment #15) > After discussing this on IRC I'll make a change to support this use case, > without needing to rebuild libstdc++ when glibc is updated. I've created https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69413 for that.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #15 from Jonathan Wakely --- (In reply to Jonathan Wakely from comment #14) > So I believe the problem is that you need to reconfigure libstdc++ with the > new glibc headers, you can't just drop them in later and expect an > already-built libstdc++ to work with them. Libstdc++ depends on glibc, so if > you update glibc (or fake doing so by using --sysroot to point at a new > glibc) then you need to rebuild libstdc++ too. After discussing this on IRC I'll make a change to support this use case, without needing to rebuild libstdc++ when glibc is updated.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #14 from Jonathan Wakely --- (In reply to Dominik Vogt from comment #13) > -- snip -- > In file included from .../git/gcc/install/include/c++/6.0.0/math.h:36:0, >from x.C:1: > .../gcc/install/include/c++/6.0.0/cmath:614:11: error: ‘::isinf’ has not > been declared > using ::isinf; > ^ If this line is being compiled it means libstdc++ was configured against the old glibc headers (because _GLIBCXX_HAVE_OBSOLETE_ISINF_ISNAN is defined). The error means you are successfully using the new glibc headers when compiling your test, but they don't match the glibc headers used at configure-time. So I believe the problem is that you need to reconfigure libstdc++ with the new glibc headers, you can't just drop them in later and expect an already-built libstdc++ to work with them. Libstdc++ depends on glibc, so if you update glibc (or fake doing so by using --sysroot to point at a new glibc) then you need to rebuild libstdc++ too.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #13 from Dominik Vogt --- I'm running into problems testing the latest Gcc with the latest Glibc. The test program is just #include It's a bit difficult to provide the propert args to g++ to make it use the replacement Glibc after its own headers but before the system Glibc. This should do it: $ g++ --sysroot ~/src/git/glibc/install -std=c++11 x.C However, this results in errors with isnan and isinf: -- snip -- In file included from .../git/gcc/install/include/c++/6.0.0/math.h:36:0, from x.C:1: .../gcc/install/include/c++/6.0.0/cmath:614:11: error: ‘::isinf’ has not been declared using ::isinf; ^ .../gcc/install/include/c++/6.0.0/cmath:638:11: error: ‘::isnan’ has not been declared using ::isnan; ^ -- snip -- With -v Gcc prints this include dir search list which looks fine to me: -- snip -- ignoring nonexistent directory ".../glibc/install/usr/local/include" ignoring nonexistent directory ".../gcc/install/lib/gcc/s390x-ibm-linux-gnu/6.0.0/../../../../s390x-ibm-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: .../gcc/install/lib/gcc/s390x-ibm-linux-gnu/6.0.0/../../../../include/c++/6.0.0 .../gcc/install/lib/gcc/s390x-ibm-linux-gnu/6.0.0/../../../../include/c++/6.0.0/s390x-ibm-linux-gnu .../gcc/install/lib/gcc/s390x-ibm-linux-gnu/6.0.0/../../../../include/c++/6.0.0/backward .../gcc/install/lib/gcc/s390x-ibm-linux-gnu/6.0.0/include .../gcc/install/include .../gcc/install/lib/gcc/s390x-ibm-linux-gnu/6.0.0/include-fixed .../glibc/install/usr/include End of search list. -- snip -- Not sure whether this is a Gcc issue, a Glibc issue or just bad arguments to g++.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #12 from Dominik Vogt --- Regarding the Glibc fix; do you mean this commit? 2016-01-11 13:34 Adhemerval Zanella * Fix isinf/isnan declaration conflict with C++11 That does *not* fix the isnan and isinf errors.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #11 from Dominik Vogt --- Looks good, the errors are gone now. Thanks!
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #10 from Jonathan Wakely --- Author: redi Date: Wed Jan 20 17:44:58 2016 New Revision: 232627 URL: https://gcc.gnu.org/viewcvs?rev=232627&root=gcc&view=rev Log: Add C++11 overloads to the global namespace PR libstdc++/60401 * include/c_compatibility/math.h (acosh, asinh, atanh, acbrt, copysign, erf, erfc, exp2, expm1, fdim, fma, fmax, fmin, hypot, ilogb, lgamma, llrint, llround, log1p, log2, logb, lrint, lround, nearbyint, nextafter, nexttoward, remainder, remquo, rint, round, scalbln, scalbn, tgamma, trunc) [__cplusplus >= 201103L && _GLIBCXX_USE_C99_MATH_TR1]: Add using declarations. * testsuite/26_numerics/headers/cmath/60401.cc: New. Added: trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/60401.cc Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/c_compatibility/math.h
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #9 from Jonathan Wakely --- The isnan and isinf errors need a glibc fix, which will be in glibc 2.23, the rest I have a patch for.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #8 from Dominik Vogt --- List of functions the test complains about: acosh, asinh, atanh, cbrt, copysign, erf, erfc, exp2, expm1, fdim, fma, fmax, fmin, hypot, ilogb, isinf, isnan, lgamma, llrint, llround, log1p, log2, logb, lrint, lround, nearbyint, nextafter, nexttoward, remainder, remquo, rint, round, scalbln, scalbn, tgamma, trunc
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #7 from Dominik Vogt --- Created attachment 37408 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37408&action=edit List of errors This is a list of all remaining errors of the Plumhall test. I've not checked whether they all depend on math.h.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #6 from Dominik Vogt --- The fix seems to be incomplete. This program still does not compile: -- snip -- #include static long double (*p3c_)(long double) = acosh; -- snip -- $ g++ -std=c++11 -S x.C x.C:3:43: error: invalid conversion from ‘double (*)(double) throw ()’ to ‘long double (*)(long double)’ [-fpermissive] static long double (*p3c_)(long double) = acosh; ^ $ g++ --version g++ (GCC) 6.0.0 20160120 (experimental)
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 Jonathan Wakely changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED Target Milestone|--- |6.0 --- Comment #5 from Jonathan Wakely --- Fixed on trunk
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #4 from Jonathan Wakely --- Author: redi Date: Tue Jan 19 21:43:55 2016 New Revision: 232586 URL: https://gcc.gnu.org/viewcvs?rev=232586&root=gcc&view=rev Log: Add C++-conforming wrappers for stdlib.h and math.h PR libstdc++/14608 PR libstdc++/60401 * include/Makefile.am: Use c_compatibility math.h and stdlib.h for --enable-cheaders=c_global configs. * include/Makefile.in: Regenerate. * include/c_compatibility/math.h: Remove obsolete _GLIBCXX_NAMESPACE_C test and allow inclusion from C files. * include/c_compatibility/stdlib.h: Likewise. Support freestanding. (at_quick_exit, quick_exit): Add using directives. * include/c_global/cmath: Use #include_next for math.h. * include/c_global/cstdlib: Use #include_next for stdlib.h. * testsuite/26_numerics/headers/cmath/14608.cc: New. * testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc: Remove xfail for most targets. * testsuite/26_numerics/headers/cstdlib/60401.cc: New. Added: trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/14608.cc - copied, changed from r232581, trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc trunk/libstdc++-v3/testsuite/26_numerics/headers/cstdlib/60401.cc - copied, changed from r232581, trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/Makefile.am trunk/libstdc++-v3/include/Makefile.in trunk/libstdc++-v3/include/c_compatibility/math.h trunk/libstdc++-v3/include/c_compatibility/stdlib.h trunk/libstdc++-v3/include/c_global/cmath trunk/libstdc++-v3/include/c_global/cstdlib trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #3 from Marc Glisse --- (dup of PR 33935) (In reply to Richard Biener from comment #1) > If you include stdlib.h and not cstdlib it's a glibc bug, not a > gcc/libstdc++ one. It would make sense for libstdc++ to provide wrappers to the C headers, for all the libc (not just glibc) that only handle C. We already provide complex.h, fenv.h, tgmath.h. (In reply to Jonathan Wakely from comment #2) > Yes, but if glibc fixes it then we'll also need changes in libstdc++ to > avoid duplicate definitions, so it needs coordination. If they only add the C++03 declarations, they can reuse the same macros as solaris without coordination. And libstdc++ can put in place macros for the new C++11, ready for anyone to use. Of course it is better to make sure those match what glibc is willing to do ;-)
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 Jonathan Wakely changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Last reconfirmed||2014-03-04 Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #2 from Jonathan Wakely --- (In reply to Richard Biener from comment #1) > If you include stdlib.h and not cstdlib it's a glibc bug, not a > gcc/libstdc++ one. Yes, but if glibc fixes it then we'll also need changes in libstdc++ to avoid duplicate definitions, so it needs coordination. There are a number of issues like this that I want to fix in collaboration with the glibc team, so keeping the bug here is helpful.
[Bug libstdc++/60401] stdlib.h does not provide abs(long) overload
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401 --- Comment #1 from Richard Biener --- If you include stdlib.h and not cstdlib it's a glibc bug, not a gcc/libstdc++ one.
