Error compiling on SGI

    error(3114): identifier bool is undefined

• -32 generates 32-bit objects
• -n32 generates N32 objects
• -64 generates 64-bit objects

The SGI documentation for their CC command says it best. Pay particular attention to the version of the compiler that gets invoked based upon the CPU architecture:

CC(1)                                                                    CC(1)

NAME
     CC - C++ compiler

SYNOPSIS
     CC [ option ] ... file ...

DESCRIPTION
     CC, the SGI C++ compiler, produces files in the following formats: SGI
     object code in elf format (the normal result), binary intermediate files,
     and symbolic assembly language.

     There are really two C++ compilers, a version which generates 64-bit or
     N32 objects, and a 32-bit version which generates 32-bit objects.  The
     32-bit version is invoked when any of the options -32, -mips1, or -mips2
     is specified, or by default on all non-R8000 based systems.  The other
     version is invoked by default on R8000 based systems or when any of the
     options -n32, -64, -mips3, or -mips4 are specified. If -mips3, or -mips4.
     are specified alone, -n32 is implied on non-R8000 systems whereas -64 is
     implied on R8000 systems.  Some of the other options are recognized by
     only one of the two compilers.       

     Note:   The old cfront-based C++ compiler can be executed by specifying
             the -use_cfront option to CC in 32-bit mode, or by executing
             OCC(1).  This option will not be available in future releases and
             its use is being deprecated.

A simple test case demonstrates the problem:

#include   int main() {    bool t = true;    if(t)     cout << true << endl;   else     cout << false << endl;    return 0;  } 

$ CC -n32 booltest.cpp
$ CC -64 booltest.cpp 
$ CC -32 booltest.cpp
booltest.cpp, line 5: error(3114): identifier bool is undefined
     bool t = true;
     ^

booltest.cpp, line 5: error(3114): identifier true is undefined
     bool t = true;
              ^

2 errors detected in the compilation of booltest.cpp.
$ 

The reason for this is that the SGI compiler only defines the bool keyword in N32 and 64-bit compiler modes. Once again the SGI documentaton states it best:

   64-bit and N32 Options
     The following options are recognized only in N32 or 64-bit mode. . . .      -LANG:...              Language feature option group: control the source language              interpretation assumed by the compiler.  The individual controls              in this group are:                      bool[=(ON|OFF)]                  Enable the predefined bool data type, along with the                  predefined values true and false.  Should be used with                  caution only to suppress this type in old code which defines                  bool itself.  Because this option changes the mangling of                  function names with bool parameters, all files making up a                  program should be compiled with consistent options.  (Default                  is ON.) . . .