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Diffstat (limited to 'Documentation/kbuild/modules.txt')
| -rw-r--r-- | Documentation/kbuild/modules.txt | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/kbuild/modules.txt b/Documentation/kbuild/modules.txt index 1d247d59ad5..1821c077b43 100644 --- a/Documentation/kbuild/modules.txt +++ b/Documentation/kbuild/modules.txt @@ -486,7 +486,7 @@ Module.symvers contains a list of all exported symbols from a kernel build. Sometimes, an external module uses exported symbols from another external module. Kbuild needs to have full knowledge on all symbols to avoid spitting out warnings about undefined symbols. - Two solutions exist to let kbuild know all symbols of more than + Three solutions exist to let kbuild know all symbols of more than one external module. The method with a top-level kbuild file is recommended but may be impractical in certain situations. @@ -523,6 +523,13 @@ Module.symvers contains a list of all exported symbols from a kernel build. containing the sum of all symbols defined and not part of the kernel. + Use make variable KBUILD_EXTRA_SYMBOLS in the Makefile + If it is impractical to copy Module.symvers from another + module, you can assign a space separated list of files to + KBUILD_EXTRA_SYMBOLS in your Makfile. These files will be + loaded by modpost during the initialisation of its symbol + tables. + === 8. Tips & Tricks --- 8.1 Testing for CONFIG_FOO_BAR |