[Bug libstdc++/110646] New: gensupport.cc:643:18: error: 'stoi' is not a member of 'std'

["danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110646

            Bug ID: 110646
           Summary: gensupport.cc:643:18: error: 'stoi' is not a member of
                    'std'
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: danglin at gcc dot gnu.org
                CC: redi at gcc dot gnu.org
  Target Milestone: ---
              Host: hppa64-hp-hpux11.11
            Target: hppa64-hp-hpux11.11
             Build: hppa64-hp-hpux11.11

Created attachment 55532
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55532&action=edit
Fix for build error.

g++ -std=c++11 -c   -g -DIN_GCC    -fno-exceptions -fno-rtti
-fasynchronous-unwi
nd-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format
-Wmiss
ing-format-attribute -Wconditionally-supported -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H 
-DGENERATOR_FILE -I. -Ibuild -I../../gcc/gcc -I../../gcc/gcc/build
-I../../gcc/gcc/../include  -I../../gcc/gcc/../libcpp/include  \
        -o build/gensupport.o ../../gcc/gcc/gensupport.cc
../../gcc/gcc/gensupport.cc: In constructor 'conlist::conlist(const char*,
unsigned int, bool)':
../../gcc/gcc/gensupport.cc:643:18: error: 'stoi' is not a member of 'std'; did
you mean 'atoi'?
  643 |       idx = std::stoi (name);
      |                  ^~~~
      |                  atoi

Build gcc is:
gcc version 12.2.1 20230420 [remotes/origin/releases/gcc-12
r12-9449-g3907147aa9
b] (GCC)

libstdc++ provides std::stoi in basic_string.h when _GLIBCXX_USE_C99_STDLIB is
1.  However, hpux11.11 lacks all the routines needed when
_GLIBCXX_USE_C99_STDLIB is 1. But it does have strtol, atol, atoi, strtoul,
strtod and atof.  strtoll and strtoull are not needed on hppa64 as long long
and long are equivalent.  So it seems the string conversion routines could be
provided in basic_string.h for this target.