HP aC++/HP C A.06.25 Release Notes
Table Of Contents
- HP aC++/HP ANSI C Release Notes
- Table of Contents
- 1 HP aC++/HP ANSI C Release Notes
- 2 What’s New in This Version
- New Features in Version A.06.25
- C99 default C compilation mode (Changed)
- Full -AA default C++ compilation mode (Changed)
- -Ax option enables support for several C++0x extensions (New)
- C99 features added to C++0x (New)
- extern template
- Decimal Floating Point supported in C++ mode (New)
- #pragma STDC FLOAT_CONST_DECIMAL64 (New)
- #pragma omp task (New)
- #pragma omp taskwait (New)
- Performance enhancements for +O1 (Changed)
- Non-template static data members initialized outside the class no longer treated as constants in strict mode (Changed)
- Enhancements to allow code to run well on current platforms and future multi-core processors (New)
- New diagnostic messages (New)
- Improved diagnostic messages (Changed)
- Enhanced +wendian warnings (New/Changed)
- New runtime abort messages (New)
- New Features in Version A.06.20
- Decimal floating-point arithmetic (HP-UX 11.31 only) (New)
- +annotate=structs (New)
- +check=lock (New)
- +check=thread (New)
- +O[no]autopar now supported in C++ Mode (New)
- +O[no]dynopt (HP-UX 11.31 only) (New)
- +inline_level num (Enhanced)
- -dumpversion (New)
- #include_next (New)
- #pragma diag_push (New)
- #pragma diag_pop (New)
- +Oinlinebudget is deprecated (Change)
- In next release, default C compilation mode will change from C89 to C99
- In next release, default C++ compilation mode will change to full -AA
- New Features in Version A.06.15
- printf, fprintf Optimization (New)
- +Wmacro Option (New)
- +Wcontext_limit Option (New)
- +wperfadvice Option (New)
- +Wv Option (New)
- +wlock Option (New)
- +O[no]autopar Option (New)
- +O[no]loop_block Option (New)
- +O[no]loop_unroll_jam (Default Change)
- +Olit=all (Default Change for HP C)
- +macro_debug= (New)
- +pathtrace (New)
- +check Suboptions (New)
- -Bhidden_def (New)
- -dM (New)
- #pragma OPT_LEVEL INITIAL (New)
- #pragma OPTIMIZE (Deprecated)
- #pragma [NO]INLINE (New for C++ Mode)
- _Asm_ld, _Asm_ldf, _Asm_st, _Asm_stf Intrinsics (New)
- Debugging Code Compiled with Opt Levels above +O1 Is Supported
- __attribute__ ((visibility("default"|"protected"|"hidden"))) Added (New)
- __attribute__ ((warn_unused_result)) Added (New)
- Change in treatment of cv-qualified assignment operators
- New Features in Version A.06.12
- New Features in Version A.06.10
- HP Code Advisor
- +cond_rodata Option (Obsoleted)
- +[no]dep_name Option (New)
- +expand_types_in_diag Option (New)
- +FPmode Option (Enhanced)
- +Ointeger_overflow (Default Changed)
- +Onolibcalls= Option (New)
- +wendian Option (New)
- +wlint Option (Enhanced)
- +wsecurity= Option (Enhanced)
- System-wide Option Configuration
- [NO]PTRS_TO_GLOBALS Pragma
- -AA -D_HP_NONSTD_FAST_IOSTREAM Performance Improvement Macro
- New Function Attributes
- Improved Diagnostics
- C++ Standard Library Change
- Earlier Versions
- New Features in Version A.06.25
- 3 Installation Information
- 4 Compatibility Information
- 5 Known Problems and Workarounds
- Obsolete LANG-STARTUP Files
- codecvt_byname Facet Needed for C Locale Conversions
- Using +check= Options and Running on Test and Deployment Systems
- GPREL22 Relocation Error
- Object Files Generated at +O4 or -ipo
- Incompatibilities Between the Standard C++ Library Ver. 1.2.1 and the Draft Standard
- Conflict Between macros.h and numeric_limits Class (min and max)
- Known Limitations
- 6 Related Documentation
New diagnostic messages (New)
The following new diagnostic messages are added to the compiler:
• Warning #3750
Warning #3750 is now emitted for lines that end with a backslash followed by a
space. For example:
int main(){
int something; \
int anotherthing;
}
line 2: warning #3750-D: "\" followed by white space is not a line splice
• Warning #2767
In 64-bit C compilations, casting a pointer to an integral type of lower size now
generates warning #2767. Previously, this was only a remark.
• Remark #3719
In cases where the constructor initialization list is invoked in an order different
from what the programmer apparently expects, a new remark #3719 is now emitted.
For example:
class A{
public:
A(int c);
int i, j;
};
A::A(int c): i(++c), j(++c) { }
//remark #3719 - Init order is different than
//what is apparent from the code above
Improved diagnostic messages (Changed)
Several improvements have been made in the compiler diagnostic messages in terms
of wording, better positioning of error constructs, and removal of redundant diagnostics.
Some examples:
Warning #2069 is replaced with warning #2767 when appropriate.
Diagnostic #2069 is now suppressed in cases where it appeared in addition to diagnostic
#2513.
Diagnostic #3056 is now suppressed in cases where it appeared in addition to diagnostic
#2120.
Diagnostic #2028 is now suppressed in cases where it appeared in addition to diagnostic
#2060.
18 What’s New in This Version