Linux and UNIX Man Pages

Test Your Knowledge in Computers #365
Difficulty: Medium
The original code for vi was written by Bill Joy in 1976.
True or False?
Linux & Unix Commands - Search Man Pages

(freebsd section 3)
man page for dwarf_undef_macro

DWARF_UNDEF_MACRO(3)					   BSD Library Functions Manual 				      DWARF_UNDEF_MACRO(3)

NAME
dwarf_undef_macro -- record the removal of a macro definition LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_undef_macro(Dwarf_P_Debug dbg, Dwarf_Unsigned lineno, char *name, Dwarf_Error *err); DESCRIPTION
Function dwarf_undef_macro() records the removal of a macro definition in a DWARF producer instance. Argument dbg should reference a DWARF producer instance allocated using dwarf_producer_init(3) or dwarf_producer_init_b(3). Argument lineno specifies the line number of the source line where the macro definition was removed. A value of zero indicates that the macro definition was removed before any source files were read. Argument name should point to a NUL-terminated string containing the name of the macro. If argument err is not NULL, it will be used to store error information in case of an error. RETURN VALUES
On success, function dwarf_undef_macro() returns DW_DLV_OK. In case of an error, function dwarf_undef_macro() returns DW_DLV_ERROR and sets the argument err. EXAMPLE
To record the fact that the macro named _STDIO_H_ was removed at line 220 of the current macro file, use: Dwarf_P_Debug dbg; Dwarf_Error de; /* ... Assume 'dbg' refers to a DWARF producer instance... */ if (dwarf_undef_macro(dbg, 220, "_STDIO_H_", &de) != DW_DLV_OK) errx(EXIT_FAILURE, "dwarf_def_macro failed: %s", dwarf_errmsg(-1)); ERRORS
Function dwarf_undef_macro() can fail with: [DW_DLE_ARGUMENT] Either arguments dbg or name was NULL. [DW_DLE_MEMORY] An out of memory condition was encountered during the execution of the function. SEE ALSO
dwarf(3), dwarf_def_macro(3), dwarf_end_macro_file(3), dwarf_producer_init(3), dwarf_producer_init_b(3), dwarf_start_macro_file(3), dwarf_vendor_ext(3) BSD
November 9, 2011 BSD

Featured Tech Videos