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
Compiler Pragmas
HP C/C++ Programmer’s Guide for NonStop Systems—429301-010
13-28
EXTERN_DATA
GP_OK
means that GP-relative addressing is allowed. This value is not valid for the TNS/E
compilers.
NO_GP
means that GP-relative addressing must not be used. This is the value that
typically indicates that the data is exported by an SRL.
variable-name
identifies a variable that has previously been declared.
The pragma default settings are:
Usage Guidelines
•
The EXTERN_DATA pragma can be entered on the compiler RUN command line or
in the source text. It can also be specified with the -Wextern_data flag of the
c89 utility.
•
If no variable-name is given, the pragma sets the global default, which remains
in effect until the next EXTERN_DATA pragma. This form of the pragma can appear
in source code, in the compiler RUN command line, or in a c89 flag.
•
If a variable-name is given, the pragma sets the addressing type to use for only
the specified variable. This form of the pragma can appear only in the source. It
must occur after the declaration of variable-name.
•
EXTERN_DATA GP_OK is not compatible with generation of PIC (Position-
Independent Code) code. The TNS/R native compiler issues a warning if this
pragma is combined with the SHARED pragma or CALL_SHARED, and ignores
the GP_OK directive. The TNS/E compiler ignores this directive.
•
Specifying EXTERN_DATA GP_OK as the global default might prevent some
ISO/ANSI C Standard conforming programs from linking successfully. This might
occur if the user program uses SRL data but does not use the correct header file to
declare the SRL data.
For example, the C run-time library is in an SRL, and all the data it exports (such
as errno) is SRL data. GP-addressing cannot be used to access SRL data. The
nld utility issues an error when an SRL data item is addressed through GP. You
can correct this problem by doing one of these:
SYSTYPE GUARDIAN SYSTYPE OSS
TNS C compiler N.A. N.A.
G-series TNS c89 utility N.A. N.A.
TNS/R native C and C++ compilers EXTERN_DATA NO_GP EXTERN_DATA NO_GP
Native c89 utility EXTERN_DATA NO_GP EXTERN_DATA NO_GP
TNS/E native C and C++ compilers EXTERN_DATA NO_GP EXTERN_DATA NO_GP