Several linker script commands deal with files.
INCLUDEup to 10 levels deep.
You can place
INCLUDE directives at the top level, in
SECTIONS commands, or in output section descriptions.
INPUTcommand directs the linker to include the named files in the link, as though they were named on the command line.
For example, if you always want to include subr.o any time you do a link, but you can't be bothered to put it on every link command line, then you can put `INPUT (subr.o)' in your linker script.
In fact, if you like, you can list all of your input files in the linker script, and then invoke the linker with nothing but a `-T' option.
In case a sysroot prefix is configured, and the filename starts
with the `/' character, and the script being processed was
located inside the sysroot prefix, the filename will be looked
for in the sysroot prefix. Otherwise, the linker will try to
open the file in the current directory. If it is not found, the
linker will search through the archive library search path.
The sysroot prefix can also be forced by specifying
as the first character in the filename path. See also the
description of `-L' in Command Line Options.
If you use `INPUT (-lfile)', ld will transform the
.a, as with the command line argument
When you use the
INPUT command in an implicit linker script, the
files will be included in the link at the point at which the linker
script file is included. This can affect archive searching.
GROUPcommand is like
INPUT, except that the named files should all be archives, and they are searched repeatedly until no new undefined references are created. See the description of `-(' in Command Line Options.
GROUPcommands, among other filenames. The files listed will be handled as if they appear directly in the
GROUPcommands, with the exception of ELF shared libraries, that will be added only when they are actually needed. This construct essentially enables --as-needed option for all the files listed inside of it and restores previous --as-needed resp. --no-as-needed setting afterwards.
OUTPUTcommand names the output file. Using
)in the linker script is exactly like using `-o filename' on the command line (see Command Line Options). If both are used, the command line option takes precedence.
You can use the
OUTPUT command to define a default name for the
output file other than the usual default of a.out.
SEARCH_DIRcommand adds path to the list of paths where ld looks for archive libraries. Using
)is exactly like using `-L path' on the command line (see Command Line Options). If both are used, then the linker will search both paths. Paths specified using the command line option are searched first.
STARTUPcommand is just like the
INPUTcommand, except that filename will become the first input file to be linked, as though it were specified first on the command line. This may be useful when using a system in which the entry point is always the start of the first file.