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authorMasahiro Yamada <yamada.masahiro@socionext.com>2019-06-04 19:13:59 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2019-06-15 19:57:01 +0900
commite949f4c2d6a3df2b7fd00e56c0f081b15284906f (patch)
treec5b592d884e6eef3680177e384dfd567cc6e03e5 /lib
parentc6509a24d6ba0f8560a81c032c30d169ba467b0a (diff)
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kbuild: add CONFIG_HEADERS_INSTALL and loosen the dependency of samples
Commit 5318321d367c ("samples: disable CONFIG_SAMPLES for UML") used a big hammer to fix the build errors under the samples/ directory. Only some samples actually include uapi headers from usr/include. Introduce CONFIG_HEADERS_INSTALL since 'depends on HEADERS_INSTALL' is clearer than 'depends on !UML'. If this option is enabled, uapi headers are installed before starting directory descending. I added 'depends on HEADERS_INSTALL' to per-sample CONFIG options. This allows UML to compile some samples. $ make ARCH=um allmodconfig samples/ [ snip ] CC [M] samples/configfs/configfs_sample.o CC [M] samples/kfifo/bytestream-example.o CC [M] samples/kfifo/dma-example.o CC [M] samples/kfifo/inttype-example.o CC [M] samples/kfifo/record-example.o CC [M] samples/kobject/kobject-example.o CC [M] samples/kobject/kset-example.o CC [M] samples/trace_events/trace-events-sample.o CC [M] samples/trace_printk/trace-printk.o AR samples/vfio-mdev/built-in.a AR samples/built-in.a Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug19
1 files changed, 14 insertions, 5 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7cdcb962358c..6a6ea4219d1e 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -305,14 +305,23 @@ config DEBUG_FS
If unsure, say N.
+config HEADERS_INSTALL
+ bool "Install uapi headers to usr/include"
+ depends on !UML
+ help
+ This option will install uapi headers (headers exported to user-space)
+ into the usr/include directory for use during the kernel build.
+ This is unneeded for building the kernel itself, but needed for some
+ user-space program samples. It is also needed by some features such
+ as uapi header sanity checks.
+
config HEADERS_CHECK
bool "Run sanity checks on uapi headers when building 'all'"
- depends on !UML
+ depends on HEADERS_INSTALL
help
- This option will extract the user-visible kernel headers when
- building the 'all' target, and will run basic sanity checks on them to
- ensure that exported files do not attempt to include files which
- were not exported, etc.
+ This option will run basic sanity checks on uapi headers when
+ building the 'all' target, for example, ensure that they do not
+ attempt to include files which were not exported, etc.
If you're making modifications to header files which are
relevant for userspace, say 'Y', and check the headers