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
#pragma diag_pop (New)
This pragma restores the severities of all diagnostics to the state prior to the last
#pragma diag_push. A compilation unit should have an equal number of #pragma
diag_push and #pragma diag_pop uses.
+Oinlinebudget is deprecated (Change)
The +Oinlinebudget option is deprecated in this release and will not be supported
in future releases. Use +inline_level.
In next release, default C compilation mode will change from C89 to C99
In the next version of the HP C/aC++ compiler, the default C compilation mode will
change from C89 to C99. So cc -Ae or aCC -Ae will be the same as -AC99, and C99
features will be enabled.
Users can prepare for this transition by adding -AC99 to their build options and
addressing any issues. Errors that can happen with -AC99 include:
• enum out of range:
error #2066: enumeration value is out of "int" range
error #4041: enumeration value is out of "char" range
• Restriction on constant expressions:
error #2057: this operator is not allowed in a constant expression
error #2028: expression must have a constant value
Was this:
warning #4045-D: non-constant initialization performed at runtime
• Non-static inline can't reference static:
error #3031-D: an entity with internal linkage cannot be referenced
within an inline function with external linkage
• Use of inline or restrict as variables/functions/types. New diagnostics will
be added to warn users about the use of inline and restrict in this release
(A.06.20). For example:
4347 %s is a keyword in the C99 C Standard, and its usage as an
identifier will cause an error in C99 mode
In next release, default C++ compilation mode will change to full -AA
In the next version of the HP C/aC++ compiler, the default C++ compilation mode will
change from almost -AA to -AA. This will enable -Wc,-ansi_for_scope,on. This
is being done to reduce porting efforts by meeting the C++ Standard.
Users can prepare for this transition by adding -AA to their build options and
addressing any issues. Errors and warnings (with unintended runtime results) that can
happen with -Wc,-ansi_for_scope,on include:
• Loop index is no longer in scope after the for loop body:
New Features in Version A.06.20 27