PETSc version 3.17.0
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# PetscDLSym

finds a symbol in a dynamic library

### Synopsis

    PetscErrorCode  PetscDLSym(PetscDLHandle handle,const char symbol[],void **value)

Not Collective

### Input Parameters

| handle | - obtained with PetscDLOpen() or NULL
| symbol | - name of symbol

### Output Parameter

| value | - pointer to the function, NULL if not found

### Notes

If handle is NULL, the symbol is looked for in the main executable's dynamic symbol table. In order to be dynamically loadable, the symbol has to be exported as such. On many UNIX-like systems this requires platform-specific linker flags.

### See Also

PetscDLClose(), PetscDLOpen(), PetscDLAddr()

### Level

developer

### Location

src/sys/dll/dlimpl.c
Index of all Sys routines
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