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Subject:	How to get std::strtoull (unsigned long long)?
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From:	Markus Selve <MSELVE AT de DOT ibm DOT com>
Date:	Tue, 29 Nov 2011 11:04:07 +0100
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Hello,

I'm trying to use std::strtoull in a C++ program, but compiling it I get:

 error: 'strtoull' is not a member of 'std'

It works, if I use strtoul ('unsigned long' versus 'unsigned long long'
above).
Cygwin uses newlib and I checked the documentation on the newlib homepage:
It provides both the 'unsigned long' and the 'unsigned long long' version.
Also cygwin/gcc allows to use 'unsigned long long' variables.  So it's not
that everything related 64 bit is not available, because I'm compiling for
a 32bit Windows.  Is there a special option I should use to get access to
more 64 bit methods?

Here is a simple test program to show the effect:

#include <cstdlib>

int main(int argc, char** argv)
{
    unsigned long long l = 0;

    l = std::strtoull("0x100", NULL, 16);

    return 0;
}


This is the call to the compiler:

$ g++ -Wall -o tt tt.cpp
tt.cpp: In function 'int main(int, char**)':
tt.cpp:7:9: error: 'strtoull' is not a member of 'std'


Here is my version of cygwin and gcc / g++:
CYGWIN_NT-5.1 XXXXXXXX 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin
g++ (GCC) 4.5.3



Mit freundlichen Grüßen / Kind regards

Markus Selve

zSeries I/O Firmware Developer
IBM Systems &Technology Group, Systems Software Development / i390 Firmware
Development
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IBM Deutschland
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Phone: +49-7031-16-5143
E-Mail: mselve at de.ibm.com
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Geschäftsführung: Dirk Wittkopp
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