If input object files have any .comment sections that are identical, then the linker merges them to produce the smallest .common section while retaining all useful information.

The linker associates each input .comment section with the filename of the corresponding input object. If it merges identical .comment sections, then all the filenames that contain the common section are listed before the section contents, for example:

file1.o
file2.o
.comment section contents.

The linker merges these sections by default. To prevent the merging of identical .comment sections, use the --no_filtercomment command-line option.