Known Problems

Incompatibilities Between the Standard C++ Library and the Draft Standard

As the ANSI C++ draft 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 ANSI C++ draft 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.

So, if you have old source that uses "times" in header functional and also new source that uses "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 anything to compile the old source.

Unsatisfied Symbols if Using Non-current Run-time Support Library

If you see a message like the following, you may be using a non-current version of the HP aC++ run-time support library.

/opt/aCC/lbin/ld: Unsatisfied symbols:
   Class tables [Vtable] dependent on key function:
   "__versioned_type_info::~__versioned_type_info()" (data)

For example, if you are a library distributor, you must ensure that your customers use the same or a newer version of the libCsup run-time library as you. If necessary, you should install the most current HP aC++ library support patch and distribute this patch to your customers.As of the date of these release notes, the most current library support patch number is: PHSS_15043

Unsatisfied Symbols for Inline Template Functions

If you use explicit instantiation instead of closing a library, and you compile with the +inst_auto option, then unsatisfied symbols will be generated for inline template functions that are too large to inline.

Syntax Errors when Using /usr/include/sys/time.h

If you see the following error message, it means that CLOCKS_PER_SEC is not defined:

Error 171: "7198.C", line 2 # Undeclared variable
'CLOCKS_PER_SEC'.  int i = CLOCKS_PER_SEC;
                           ^^^^^^^^^^^^^^

The workaround is to modify the /usr/include/sys/time.h file as follows:

The /usr/include/sys/time.h file contains a K & R style function declaration for which HP aC++ generates an error like the following:

Error 43: "/usr/include/sys/time.h", line 487 # C++ does not allow
Old-style (non-prototype) function definitions.      

To workaround, whenever time.h is included by a source program, you can define the __STDC__ macro on your command-line, as in the following example:

aCC -D__STDC__

Or you can install the appropriate patch listed below:

PHKL_8691    series 700    HP-UX 10.10
PHKL_8692    series 800
PHKL_8693    series 700    HP-UX 10.20
PHKL_8694    series 800

HP aC++ generatres an error like the following stating that structs or any types cannot be declared extern.

Error 608: "/usr/include/sys/time.h", line ??? # Types may not be
declared static, auto, register, extern or mutable.
     extern struct sigevent;
     ^^^^^^^^^^^^^^^^^^^^^^

The error is caused by a problem in the /usr/include/sys/time.h file. To workaround, you can change the line extern struct sigevent; in the time.h file to:

struct sigevent;

Or you can install the appropriate patch listed below:

PHKL_7962    series 700    HP-UX 10.20
PHKL_7963    series 800

Syntax Problems when Using /usr/include/math.h

To resolve a conflict between the exception struct in /usr/include/sys/math.h and the aC++ exception struct, the workaround is to modify the /usr/include/math.h file as follows:

Alternatively, you can install the PHCO_9261 patch.

Warnings when using /usr/include/rpc/xdr.h

Compile-time warnings like the following should be ignored. They are caused by an incorrect prototype in the /usr/include/rpc/xdr.h file.

Warning 301: "/YourFileName/usr/include/rpc/xdr.h", line 276 # The
(...) parameter list is a non-portable feature.
extern bool_t xdrrec_eof(__o);      /* true iff no more input */

Binary Compatibility

An application that ran on previous HP-UX 10.x releases (10.01, 10.10, or 10.20) will generally continue to run with the same behavior with this 10.20-based HP aC++ release provided that any dependent shared libraries are also present. An executable is a binary file that has been processed by the HP linker with ld or indirectly with the compiler, and can be run by the HP-UX loader(exec).

The following items describe exceptions to binary compatibility between the previous 10.20 and current releases. These conditions can occur during your development process, but rarely affect deployed applications.