Native build fails in winsup/cygwin/libc/strptime.cc because of strtou?l_l()

["Hans-Bernhard Bröker" <HBBroeker@t-online.de>]

Hello everyone,

building the git version of cygwin natively on Cygwin-2.5.3, I'm running 
into a problem with strtoul_l / strtol_l. 
winsup/cygwin/libc/strptime.cc fails to build:

hbbro@NB4 ~/prg/cygwin/bld/x86_64-unknown-cygwin/winsup/cygwin
$ make
c++wrap -O2 -g -fno-rtti -fno-exceptions -fno-use-cxa-atexit -Wall 
-Wstrict-aliasing -Wwrite-strings -fno-common -pipe -fbuiltin 
-fmessage-length=0 -MMD -Werror -fmerge-constants -ftracer 
-mcmodel=small -c -o strptime.o 
../../../../newlib-cygwin/winsup/cygwin/libc/strptime.cc
../../../../newlib-cygwin/winsup/cygwin/libc/strptime.cc: In function 
'era_info_t* get_era_info(const char*, locale_t)':
../../../../newlib-cygwin/winsup/cygwin/libc/strptime.cc:125:53: error: 
'strtol_l' was not declared in this scope
        ei[cur].offset = strtol_l (era, &c, 10, locale);
                                                      ^
../../../../newlib-cygwin/winsup/cygwin/libc/strptime.cc: In function 
'char* __strptime(const char*, const char*, tm*, era_info_t**, 
alt_digits_t**, locale_t)':
../../../../newlib-cygwin/winsup/cygwin/libc/strptime.cc:390:50: error: 
'strtoul_l' was not declared in this scope
       width = strtoul_l (fmt - 1, &end, 10, locale);
                                                   ^
make: *** 
[../../../../newlib-cygwin/winsup/cygwin/../Makefile.common:41: 
strptime.o] Fehler 1


Looking at the .ii file, it appears __GNU_VISIBLE is not active for this 
C++ source file?

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