signal was not declared in this scope

[tansy]

Trying to compile it in Linux got this error:

error: ‘signal’ was not declared in this scope Added signal header include in the unix section.

Error in full:

g++ -std=c++11 -Wall -O2 -c -o zpaqfranz.o zpaqfranz.cpp
zpaqfranz.cpp: In function ‘int main(int, const char**)’:
zpaqfranz.cpp:54352:10: error: ‘SIGINT’ was not declared in this scope
  signal (SIGINT,my_handler); // the control-C handler
          ^~~~~~
zpaqfranz.cpp:54352:27: error: ‘signal’ was not declared in this scope
  signal (SIGINT,my_handler); // the control-C handler
                           ^
make: *** [zpaqfranz.o] Error 1

When looked for error I got this this answer: You haven't included signal.h. . Therefore added #include <signal.h>.

[fcorbelli]

error: ‘signal’ was not declared in this scope Added signal header include in the unix section.

include

Compiling... where?

[tansy]

In Linux. Updated first post with explanation.

[fcorbelli]

In Linux.

Can you please write the exact distro and version? I'll check and fix tomorrow (only Windows now) Thank you

[tansy]

Slackware 14.x, heavily updated. GCC 4.9, 6.5, Clang 3.8, same result.

[fcorbelli]

Slackware 14.x, heavily updated. GCC 4.9, 6.5, Clang 3.8, same result.

Cannot reproduce on Slackware 15, gcc 11.2.0, clang 13.0.0 I'll try with version 14

[tansy]

only Windows now

https://www.virtualbox.org/ http://www.slackware.com/getslack/

[fcorbelli]

only Windows now

https://www.virtualbox.org/ http://www.slackware.com/getslack/ Slackware64 14.0 VM gcc 5.3.0 clang 3.8.0 g++ -O3 -Dunix zpaqfranz.cpp -o zpaqfranz -pthread -std=c++11 clang++ -O3 -Dunix zpaqfranz.cpp -o zpaqfranz -pthread -std=c++11

Slackware64 15.0 VM gcc 11.2.0 g++ -O3 -Dunix zpaqfranz.cpp -o zpaqfranz -pthread -lstdc++ -lm clang 13.0.0 clang++ -O3 -Dunix zpaqfranz.cpp -o zpaqfranz -pthread

Now on Slackware 12 32 bit , work in progress...

[fcorbelli]

On old compilers the -DANCIENT is mandatory, for example

Slackware 12.0 (32 bit)
gcc 4.1.2
g++ -O3 -DANCIENT -Dunix zpaqfranz.cpp -o zpaqfranz -pthread

This will disable the Control-C handler

[tansy]

What you call ancient? Your Linux esxi (whatever that means) executable is compiled with gcc-3.4.6.

[fcorbelli]

What you call ancient? Your Linux esxi (whatever that means) executable is compiled with gcc-3.4.6.

ESXi is the VMware hypervisor
Ancient is, for example, Power PC-powered Macs, some very old Solaris machines etc For Linux just about anything earlier of gcc 7.3 (of 2018) is ancient, for me at least. If zpaqfranz does not compile, try -DANCIENT
Cannot "guess" what your compiler do/don't support gcc 5.3 is 8 years old, about 40 releases older then the current one clang 3.8 about 50 releases

[fcorbelli]

To facilitate cross-platform portability, I will not include signal.h