Developer Guide and Reference

Contents

ftls-model

Changes the thread local storage (TLS) model.

Syntax

Linux:
-ftls-model=
model
macOS:
-ftls-model=
model
Windows:
None
Arguments
model
Determines the TLS model used by the compiler. Possible values are:
global-dynamic
Generates a generic TLS code. The code can be used everywhere and the code can access variables defined anywhere else. This setting causes the largest size code to be generated and uses the most run time to produce.
local-dynamic
Generates an optimized TLS code. To use this setting, the thread-local variables must be defined in the same object in which they are referenced.
initial-exec
Generates a restrictive, optimized TLS code. To use this setting, the thread-local variables accessed must be defined in one of the modules available to the program.
local-exec
Generates the most restrictive TLS code. To use this setting, the thread-local variables must be defined in the executable.
Default
OFF
The compiler uses default heuristics when determining the thread-local storage model.
D