HP aC++ Release Notes Version A.03.95 (5900-1789; September 2011)

HP aC++ Release Notes
Problem Descriptions and Fixes, and Known Limitations
Chapter 1 75
Incompatibilities Between Standard C++ Library Version 1.2.1 and the Draft Standard
As the ANSI C++ standard has evolved over time, the Standard C++ Library has not always kept up. Such is
the case for the times function object in the functional header file. In the standard, times has been
renamed to multiplies.
If you want to use multiplies in your code, to be compatible with the ISO/ANSI C++ standard, use a
conditional compilation flag on the aCC command line. For example, for the following program, compile
with the command line:
aCC -D__HPACC_USING_MULTIPLIES_IN_FUNCTIONAL test.c
// test.c
int times; //user defined variable
#include <functional>
// multiplies can be used in
int main() {}
// end of test.c
Depending on the existence of the conditional compilation flag, functional defines either times, or
multiplies, not both. If you have old source that uses times in header functional and also new sources
that use multiplies, the sources cannot be mixed.
Mixing the two sources would constitute a non-conforming program, and the old and new sources may or
may not link. If your code uses the old name times, and you want to continue to use the now non-standard
times function object, you do not need to do change the old source to compile it.
Changes to the math.h System Header File
At the HP-UX 11.00/11i release, the math.h header file has changed in the following ways:
• fmax and fmin are new functions. If you have used these function names in your code in a prior release
and want to continue using them, you must rename your functions. If this is a problem in your code, you
will see the following error:
The overloading mechanism cannot tell a double (double , double ) from
a ... (1103)
• The _ABS function has been renamed. To continue using this function, replace any call to _ABS() with
abs().
Conflict Between macros.h and numeric_limits Class (min and max)
If your code includes /usr/include/macros.h, the min and max macros defined in macros.h conflict
with the min and max functions defined in the numeric_limits class of the Standard C++ Library. The
following code, for example, would generate a compiler Error 134:
numeric_limits<unsigned int>::max();