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Diffstat (limited to 'Documentation/kbuild/makefiles.rst')
| -rw-r--r-- | Documentation/kbuild/makefiles.rst | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst index 14d8e7d23c04..b81b8913a5a3 100644 --- a/Documentation/kbuild/makefiles.rst +++ b/Documentation/kbuild/makefiles.rst @@ -749,6 +749,10 @@ Both possibilities are described in the following. hostprogs := lxdialog always-y := $(hostprogs) + Kbuild provides the following shorthand for this: + + hostprogs-always-y := lxdialog + This will tell kbuild to build lxdialog even if not referenced in any rule. @@ -831,7 +835,32 @@ The syntax is quite similar. The difference is to use "userprogs" instead of 5.4 When userspace programs are actually built ---------------------------------------------- - Same as "When host programs are actually built". + Kbuild builds userspace programs only when told to do so. + There are two ways to do this. + + (1) Add it as the prerequisite of another file + + Example:: + + #net/bpfilter/Makefile + userprogs := bpfilter_umh + $(obj)/bpfilter_umh_blob.o: $(obj)/bpfilter_umh + + $(obj)/bpfilter_umh is built before $(obj)/bpfilter_umh_blob.o + + (2) Use always-y + + Example:: + + userprogs := binderfs_example + always-y := $(userprogs) + + Kbuild provides the following shorthand for this: + + userprogs-always-y := binderfs_example + + This will tell Kbuild to build binderfs_example when it visits this + Makefile. 6 Kbuild clean infrastructure ============================= |