[yocto] Provides/Depends

[Vinodh Rajaraman (vrajaram)]

Hi,

Am new to BitBake, and would need some help understanding RPROVIDES/RDEPENDS and how I need to write Recipes with respect to these. Am writing a new Recipe to generate a RPM, and we get few dependency errors as below.

Computing transaction...error: Can't install core-1.0-r0 at lib32_x86: no package provides libdevmapper.so.1.02
Computing transaction...error: Can't install core-1.0-r0 at lib32_x86: no package provides /usr/bin/expect
Computing transaction...error: Can't install core-1.0-r0 at lib32_x86: no package provides libicudata.so.36


In my workspace, I see that nobody is providing this library, but a rpm query on system yields as below

$ rpm --query --provides device-mapper
libdevmapper-event.so.1.02()(64bit)
libdevmapper-event.so.1.02(Base)(64bit)
libdevmapper.so.1.02()(64bit)
libdevmapper.so.1.02(Base)(64bit)
device-mapper = 1.02.67-2.el5
libdevmapper-event.so.1.02
libdevmapper-event.so.1.02(Base)
libdevmapper.so.1.02
libdevmapper.so.1.02(Base)
device-mapper = 1.02.67-2.el5

I see that there is a package that provides this library that my Bitbake recipe is dependent on.
sjc-ads-1625:/ws/vrajaram-sjc/demo/satori/target-n9000/bitbake_build/tmp/work=>$find . -name "libicudata*"
./x86_64-wrs-linux/icu-3.6-r7/icu/source/stubdata/libicudata.so.36.0
./x86_64-wrs-linux/icu-3.6-r7/icu/source/stubdata/libicudata.so.36
./x86_64-wrs-linux/icu-3.6-r7/icu/source/stubdata/libicudata.so
./x86_64-wrs-linux/icu-3.6-r7/icu/source/lib/libicudata.so.36.0
./x86_64-wrs-linux/icu-3.6-r7/icu/source/lib/libicudata.so.36
./x86_64-wrs-linux/icu-3.6-r7/icu/source/lib/libicudata.so
./x86_64-wrs-linux/icu-3.6-r7/image/usr/lib64/libicudata.so.36.0
./x86_64-wrs-linux/icu-3.6-r7/image/usr/lib64/libicudata.so
./x86_64-wrs-linux/icu-3.6-r7/image/usr/lib64/libicudata.so.36

sjc-ads-1625:/ws/vrajaram-sjc/demo/satori/target-n9000/bitbake_build/tmp/work=>$which expect
/usr/bin/expect


Now question is, how do I make my recipe refer to above packages, or libraries ? Do I need to add them to RDEPENDS_{PN} += " " ? And what syntax should I use for referencing for each case above? Not sure from where I can get /usr/bin/expect from ? Should we download ?

Vinodh
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