On Thu, 8 Jul 2021 at 07:42, Max Mikhanosha via Cygwin
<cygwin@cygwin.com> wrote:
>
> Fully updated Windows 10, with freshly downloaded Cygwin.
>
> trying to compile google/benchmark does not work coz it can't read
> /proc/cpuinfo
>
> Reduced test test program
>
> #include <iostream>
> #include <fstream>
>
> int main (int argc, char **argv)
> {
> if (argc > 1)
> {
> std::fstream booya ("whatever");
> }
> std::fstream f("/proc/cpuinfo");
> if (!f.is_open ()){
> std::cout << "Unable to open /proc/cpuinfo" << std::endl;
> }
> return 0;
> }
>
> Repro log
>
>
> user@MARS ~
> $ g++ blah.cc
>
> user@MARS ~
> $ ./a.exe # this does not work
> Unable to open /proc/cpuinfo
>
> user@MARS ~
> $ ./a.exe foobar # this works
>
Works just fine for me (I added code to read the first word from the
stream and print it)
Csaba@AMDAHL ~
$ ./a.exe
processor
Csaba@AMDAHL ~
$ ./a.exe foobar
processor
Csaba
--
You can get very substantial performance improvements
by not doing the right thing. - Scott Meyers, An Effective C++11/14 Sampler
So if you're looking for a completely portable, 100% standards-conformant way
to get the wrong information: this is what you want. - Scott Meyers (C++TDaWYK)
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