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| author |   Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-01-17 09:10:03 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-01-28 09:11:17 +0900 |
| commit | dee9495303f2c6d63a20c43a26420765909898eb (patch) | |
| tree | 743ef93dc34e18f12cd67d7379979ee4651e6c96 /Documentation/kbuild | |
| parent | kbuild: skip 'addtree' and 'flags' magic for external module build (diff) | |
| download | linux-dev-dee9495303f2c6d63a20c43a26420765909898eb.tar.xz linux-dev-dee9495303f2c6d63a20c43a26420765909898eb.zip | |
kbuild: remove top-level built-in.a
The symbol table in the final archive is unneeded; the linker does not
require the symbol table after the --whole-archive option. Every object
file in the archive is included in the link anyway.
Pass thin archives from subdirectories directly to the linker, and
remove the final archiving step.
Fix up the document and comments as well.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'Documentation/kbuild')
| -rw-r--r-- | Documentation/kbuild/makefiles.txt | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index bf28c47bfd72..48eab0bb1183 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -154,13 +154,8 @@ more details, with real examples. Kbuild compiles all the $(obj-y) files. It then calls "$(AR) rcSTP" to merge these files into one built-in.a file. - This is a thin archive without a symbol table, which makes it - unsuitable as a linker input. - - The scripts/link-vmlinux.sh script later makes an aggregate - built-in.a with "${AR} rcsTP", which creates the thin archive - with a symbol table and an index, making it a valid input for - the final vmlinux link passes. + This is a thin archive without a symbol table. It will be later + linked into vmlinux by scripts/link-vmlinux.sh The order of files in $(obj-y) is significant. Duplicates in the lists are allowed: the first instance will be linked into |