5507 2013-11-07 19:50:26 +0000 Inconsistent bitbake variable handling 2014-03-20 11:04:05 +0000 1 1 7 Build System, Metadata & Runtime BitBake bitbake 1.5 x86 Multiple RESOLVED FIXED 20 March 2014: Doc flag reset Medium normal 1.6 1 mark.hatle richard.purdie kergoth poky.bs.watcher poky.watcher sgw srifenbark --- --- Done (doc changes complete) oldest_to_newest 38671 0 mark.hatle 2013-11-07 19:50:26 +0000 I had a user who was trying to clear a value and noticed something (each of these examples when set in local.conf exhibited the explained behavior.) VAL = "" The variable VAL is 'defined', but is set to None. VAL = " " The variable VAL is 'defined', and is set to the string "". VAL = " something" The variable VAL is 'defined', and is set to the string "something". Chris Larsen pointed me at: https://github.com/openembedded/bitbake/blob/master/lib/bb/data.py#L217-L218 and https://github.com/openembedded/bitbake/blob/master/lib/bb/data.py#L232 Which explains why "" and " " differ in behavior, and why leading white space is being stripped. Should "" and " " return the same (None) value, or is this correct behavior. If it is, this should likely be documented in the bitbake manual somewhere. 39067 1 richard.purdie 2013-11-25 14:55:31 +0000 Fixed in master with http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=b1c15cb9077f1d2e19376ff8506359ebbb77d6e3 41511 2 srifenbark 2014-03-20 11:04:05 +0000 Hi, I updated the http://www.yoctoproject.org/docs/1.6/user-manual/user-manual.html#basic-variable-setting section to include information about retention of leading and trailing blanks, setting a variable to an empty string, and setting a variable to whitespace. Richard reviewed the changes and approved. Setting the Doc flag to "Done". Scott