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Oracle Solaris Studio 12.3: C User's Guide     Oracle Solaris Studio 12.3 Information Library
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Document Information


1.  Introduction to the C Compiler

2.  C-Compiler Implementation-Specific Information

2.1 Constants

2.1.1 Integral Constants

2.1.2 Character Constants

2.2 Linker Scoping Specifiers

2.3 Thread Local Storage Specifier

2.4 Floating Point, Nonstandard Mode

2.5 Labels as Values

2.6 long long Data Type

2.6.1 Printing long long Data Types

2.6.2 Usual Arithmetic Conversions

2.7 Case Ranges in Switch Statements

2.8 Assertions

2.9 Supported Attributes

2.10 Warnings and Errors

2.11 Pragmas

2.11.1 align

2.11.2 c99

2.11.3 does_not_read_global_data

2.11.4 does_not_return

2.11.5 does_not_write_global_data

2.11.6 dumpmacros

2.11.7 end_dumpmacros

2.11.8 error_messages

2.11.9 fini

2.11.10 hdrstop

2.11.11 ident

2.11.12 init

2.11.13 inline

2.11.14 int_to_unsigned

2.11.15 must_have_frame

2.11.16 nomemorydepend

2.11.17 no_side_effect

2.11.18 opt

2.11.19 pack

2.11.20 pipeloop

2.11.21 rarely_called

2.11.22 redefine_extname

2.11.23 returns_new_memory

2.11.24 unknown_control_flow

2.11.25 unroll

2.11.26 warn_missing_parameter_info

2.11.27 weak

2.12 Predefined Names

2.13 Preserving the Value of errno

2.14 Extensions

2.14.1 _Restrict Keyword

2.14.2 __asm Keyword

2.14.3 __inline and __inline__

2.14.4 __builtin_constant_p()


2.15 Environment Variables




2.15.4 TMPDIR

2.16 How to Specify Include Files

2.16.1 Using the -I- Option to Change the Search Algorithm Warnings

2.17 Compiling in Free-Standing Environments

2.18 Compiler Support for Intel MMX and Extended x86 Platform Intrinsics

3.  Parallelizing C Code

4.  lint Source Code Checker

5.  Type-Based Alias Analysis

6.  Transitioning to ISO C

7.  Converting Applications for a 64-Bit Environment

8.  cscope: Interactively Examining a C Program

A.  Compiler Options Grouped by Functionality

B.  C Compiler Options Reference

C.  Implementation-Defined ISO/IEC C99 Behavior

D.  Features of C99

E.  Implementation-Defined ISO/IEC C90 Behavior

F.  ISO C Data Representations

G.  Performance Tuning

H.  Oracle Solaris Studio C: Differences Between K&R C and ISO C


2.1 Constants

This section contains information related to constants that are specific to the Oracle Solaris Studio C compiler.

2.1.1 Integral Constants

Decimal, octal, and hexadecimal integral constants can be suffixed to indicate type, as shown in the following table.

Table 2-1 Data Type Suffixes

u or U
l or L
ll or LL
long long (not available with -xc99=none and -Xc mode)
lu, LU, Lu, lU, ul, uL, Ul, or UL
unsigned long
llu, LLU, LLu, llU, ull, ULL, uLL, Ull
unsigned long long (not available with -xc99=none and -Xc mode)

With the -xc99=all, the compiler uses the first item of the following list in which the value can be represented, as required by the size of the constant:

The compiler issues a warning if the value exceeds the largest value a long long int can represent.

With the -xc99=none, the compiler uses the first item of the following list in which the value can be represented, as required by the size of the constant, when assigning types to unsuffixed constants:

2.1.2 Character Constants

A multiple-character constant that is not an escape sequence has a value derived from the numeric values of each character. For example, the constant ’123’ has a value of:


or 0x333231.

With the -Xs option and in other, non-ISO versions of C, the value is:


or 0x313233.