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26 Chapter 1
What's New in Recent Releases
New Features for 64-bit Mode Linking
64-bit Mode Linker-defined Symbols
The 64-bit linker reserves the following symbol names:
a. The linker accepts but ignores this option in 32-bit mode. It
creates an executable (a.out).
+noenvvar Instructs the dynamic loader not to look at
the LD_LIBRARY_PATH and SHLIB_PATH
environment variables at runtime.
a
+std Instructs the linker to use SVR4 compatible
linking and loading behaviors. Default for
64-bit mode.
a
+stripunwind Instructs the linker not to output the
unwind table.
+vtype type Produces verbose output about selected link
operations.
a
Symbol Definition
__SYSTEM_ID Largest architecture revision level used by
any compilation unit
_FPU_STATUS Initial value of FPU status register
_end Address of first byte following the end of the
main program’s data segment; identifies the
beginning of the heap segment
__TLS_SIZE Size of the Thread Local Storage segment
required by the program
__text_start Beginning of the text segment
_etext End of the text segment
__data_start Beginning of the data segment
Option Action