C/C++ Programmer's Guide (G06.27+, H06.03+)
Table Of Contents
- What’s New in This Manual
- About This Guide
- 1 Introduction to HP C and C++ for NonStop Systems
- TNS C Language System
- TNS C++ Language System
- TNS/R Native C and C++ Language System
- TNS/R Native C Compiler
- TNS/R Native C++ Compiler
- TNS/R Native C Run-Time Library
- C++ Run-Time Library and Standard C++ Library
- TNS/R Native Linkers (nld and ld Utilities)
- Inspect Symbolic Debugger
- Visual Inspect Symbolic Debugger
- TNS/R Native Object File Tool (noft Utility)
- NonStop SQL/MP Compiler and NonStop SQL/MX Compiler
- TNS/R Native C and C++ Migration Tool
- Features of TNS/R Native C and C++
- TNS/E Native C and C++ Language System
- TNS/E Native C Compiler
- TNS/E Native C++ Compiler
- TNS/E Native C Run-Time Library
- C++ Run-Time Library and Standard C++ Library
- TNS/E Native Linker (eld Utility)
- Native Inspect Symbolic Debugger
- Visual Inspect Symbolic Debugger
- TNS/E Native Object File Tool (enoft Utility)
- NonStop SQL/MP Compiler and NonStop SQL/MX Compiler
- TNS/E Native C and C++ Migration Tool
- Features of TNS/E Native C and C++
- Writing Portable Programs
- Porting Programs to HP C and C++ for NonStop Systems
- Porting Without Data Alignment Problems
- Guardian and OSS Environment Interoperability
- 2 C and C++ Extensions
- 3 Interfacing to Guardian Procedures and OSS Functions
- 4 Using the C Run-Time Library
- 5 Using the Standard C++ Library
- 6 Accessing Middleware Using HP C and C++ for NonStop Systems
- 7 Mixed-Language Programming for TNS Programs
- 8 Mixed-Language Programming for TNS/R and TNS/E Native Programs
- 9 System-Level Programming
- 10 Converting C-Series TNS Programs to Use the Current TNS Compiler
- 11 Migrating Programs to TNS/R or TNS/E Native Mode
- 12 Preprocessor Directives and Macros
- 13 Compiler Pragmas
- ALLOW_CPLUSPLUS_COMMENTS
- ALLOW_EXTERN_EXPLICIT_INSTANTIATION
- ANSICOMPLY
- ANSISTREAMS
- BUILD_NEUTRAL_LIBRARY
- CALL_SHARED
- CHECK
- COLUMNS
- CPATHEQ
- CPPONLY
- CSADDR
- ELD(arg)
- ENV
- ERRORFILE
- ERRORS
- EXTENSIONS
- EXTERN_DATA
- FIELDALIGN
- FORCE_VTBL
- FORCE_STATIC_TYPEINFO
- FORCE_STATIC_VTBL
- FUNCTION
- HEADERS
- HEAP
- HIGHPIN
- HIGHREQUESTERS
- ICODE
- IEEE_FLOAT
- INLINE
- INLINE_COMPILER_GENERATED_FUNCTIONS
- INLINE_LIMIT
- INLINE_STRING_LITERALS
- INNERLIST
- INSPECT
- KR
- LARGESYM
- LD(arg)
- LINES
- LINKFILE
- LIST
- LMAP
- MAP
- MAPINCLUDE
- MAXALIGN
- MIGRATION_CHECK
- NEST
- NEUTRAL
- NLD(arg)
- NOEXCEPTIONS
- NON_SHARED
- OLDCALLS
- OLIMIT
- ONCE
- OPTFILE
- OPTIMIZE
- OVERFLOW_TRAPS
- PAGE
- POOL_STRING_LITERALS
- POP
- PUSH
- REFALIGNED
- REMARKS
- RUNNABLE
- RUNNAMED
- RVU
- SAVEABEND
- SEARCH
- SECTION
- SHARED
- SQL
- SQLMEM
- SRL
- SRLExportClassMembers
- SRLExports
- SRLName
- SSV
- STDFILES
- STRICT
- SUPPRESS
- SUPPRESS_VTBL
- SYMBOLS
- SYNTAX
- SYSTYPE
- TANDEM_FLOAT
- TRIGRAPH
- VERSION1
- VERSION2
- VERSION3
- WARN
- WIDE
- XMEM
- XVAR
- 14 Compiling, Binding, and Accelerating TNS C Programs
- 15 Compiling, Binding, and Accelerating TNS C++ Programs
- 16 Compiling and Linking TNS/R Native C and C++ Programs
- 17 Compiling and Linking TNS/E Native C and C++ Programs
- 18 Using ETK and Native C/C++ Cross Compiler on the PC
- 19 Running and Debugging C and C++ Programs
- 20 TNS C Compiler Messages
- 21 Native C and C++ Compiler Messages
- 22 Run-Time Messages
- 23 Handling TNS Data Alignment
- A HP C Implementation-Defined Behavior
- Implementation-Defined Behavior of Native C
- G.3.1 Translation
- G.3.2 Environment
- G.3.3 Identifiers
- G.3.4 Characters
- G.3.5 Integers
- G.3.6 Floating Point
- G.3.7 Arrays and Pointers
- G.3.8 Registers
- G.3.9 Structures, Unions, Enumerations, and Bit Fields
- G.3.10 Qualifiers
- G.3.11 Declarators
- G.3.12 Statements
- G.3.13 Preprocessing Directives
- G.3.14 Library Functions
- G.4 Locale Behavior
- G.5 Common Extensions
- Translation Limits for Native C Compilers
- Implementation-Defined Behavior of TNS C
- G.3.1 Translation
- G.3.2 Environment
- G.3.3 Identifiers
- G.3.4 Characters
- G.3.5 Integers
- G.3.6 Floating Point
- G.3.7 Arrays and Pointers
- G.3.8 Registers
- G.3.9 Structures, Unions, Enumerations and Bit Fields
- G.3.10 Qualifiers
- G.3.11 Declarators
- G.3.12 Statements
- G.3.13 Preprocessing Directives
- G.3.14 Library Functions
- G.4 Locale Behavior
- G.5 Common Extensions
- Implementation-Defined Behavior of Native C
- B TNS C++ ImplementationDefined Behavior
- C ASCII Character Set
- D Data Type Correspondence
- E Features and Keywords of Version2NativeC++
- F MIGRATION_CHECK Messages
- Glossary
- Index
TNS C++ Implementation-Defined Behavior
HP C/C++ Programmer’s Guide for NonStop Systems—429301-010
B-5
Differences Between OSS and Guardian
Environments
Differences Between OSS and Guardian
Environments
The OSS and Guardian versions of Cfront each default to generate code that is
destined to run in their own environment. This subsection discusses how to target code
to run in the other environment and describes the differences that exist between an
executable C++ program file in the two environments.
Pragma SYSTYPE
The pragma SYSTYPE specifies whether a C++ program is targeted to run in the OSS
or the Guardian environment.
The Guardian version of Cfront defaults to generating code that is targeted for the
Guardian environment. However, when the pragma SYSTYPE OSS is specified, the
Guardian version of Cfront generates code targeted for the OSS environment.
The OSS version of Cfront defaults to generating code that is targeted for the OSS
environment. However, when the pragma SYSTYPE GUARDIAN is specified, the OSS
version of Cfront generates code targeted for the Guardian environment.
Data Models
C++ programs that are generated with the OSS version of Cfront always use the 32-bit
data model. Under the 32-bit data model the size of type int is 32 bits. C++ programs
that are generated with the Guardian version of Cfront also default to the 32-bit data
model. Therefore, the data models will be compatible unless you specify the NOWIDE
pragma when compiling the Guardian version. The NOWIDE pragma specifies the 16-
bit data model, where the size of type int is 16 bits.
If 16-bit and 32-bit data are both required, you might want to avoid type int and use
types short and long instead.
Run-Time Libraries
The OSS environment has only one C++ run-time library, libC.a.
The Guardian environment has two run-time libraries. LIBCA is used with the 32-bit
data model. LIBLA is used with the 16-bit data model.
Applicable Pragmas
In the OSS environment, the C compiler ignores these pragmas: ANSISTREAMS,
RUNNABLE, SEARCH, SSV, STDFILES, and XVAR.
For additional information on writing programs for the OSS environment, see
Section 14, Compiling, Binding, and Accelerating TNS C Programs, and Section 15,
Compiling, Binding, and Accelerating TNS C++ Programs.