Compile errors with error: 'ULONG_MAX' was not declared in this scope

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1

Hi all,

My sketch had been compiling fine on 1.6.3 and suddenly, it gives out this errors

Can anyone give some suggestions on how to fix it ??

"error: 'ULONG_MAX' was not declared in this scope"

I'm using Arduino 1.6.3 and the errors was from the tinyGPS++ library..

By itself, using the TinyGPS++ examples, the sketch compile ok..

C:\Users\stanley\Dropbox\Arduino\libraries\TinyGPSPlus/TinyGPS++.h: In member function 'uint32_t TinyGPSLocation::age() const':
C:\Users\stanley\Dropbox\Arduino\libraries\TinyGPSPlus/TinyGPS++.h:59:83: error: 'ULONG_MAX' was not declared in this scope
    uint32_t age() const    { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }
                                                                                   ^
C:\Users\stanley\Dropbox\Arduino\libraries\TinyGPSPlus/TinyGPS++.h: In member function 'uint32_t TinyGPSDate::age() const':
C:\Users\stanley\Dropbox\Arduino\libraries\TinyGPSPlus/TinyGPS++.h:83:86: error: 'ULONG_MAX' was not declared in this scope
    uint32_t age() const       { return valid ? millis() - lastCommitTime : (uint32_t)ULONG_MAX; }

tinyGPS++ FulExample compile fine....

Sketch uses 15,534 bytes (50%) of program storage space. Maximum is 30,720 bytes.
Global variables use 764 bytes (37%) of dynamic memory, leaving 1,284 bytes for local variables. Maximum is 2,048 bytes.

My sketch can be found at :-

2

Is Google broken in your country ?

It's not entirely clear why you are getting this error, but nothing is stopping you from defining it yourself.

#define ULONG_MAX 4294967295UL

It is the biggest value you can have for a 32 bit unsigned integer.

3

Thanks..

I turn on compile verbose and saw an unused GRBL library included :

Once I removed this GRBL, the compile works fine.. but when I added it back on, the above errors came back..

Weird...

Using library GRBL in folder: ....\Arduino\libraries\GRBL (legacy)
4

FYI, ULONG_MAX is defined in limits.h. If I do the following I can access ULONG_MAX in my code:

   #include "limits.h"

The original poster had a different issue, but searching for "ULONG_MAX arduino" lead to this page, so I'm leaving this breadcrumb for others.

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