Patches item #1558580, was opened at 2006-09-14 12:44 Message generated for change (Settings changed) made by markovitch You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=307586&aid=1558580&group_i... Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Yakov Markovitch (markovitch) Assigned to: Nobody/Anonymous (nobody)

Summary: jam:"VAR on TARGET ?= values" unconditionally assigns values

Initial Comment: "VAR on TARGET ?= values" unconditionally assigns values, i.e. works like "unconditional" assignment. This bug is extremely insidious, since there is no hint of wrong behaviour at all (it costed me a full day of futile debugging of my jam script before it dawned upon me that it is something wrong with assignment). Interesting, that documentation actually doesn't mention that "default assignment" is available on target, i.e. this is a "feature", but this requires _very_ attentive reading of documentation and is quite inconsistent. And even so it is a bug: there should be at least a syntax error! There are two ways to fix this bug: 1. Bring code into sync with doc, i.e. patch the syntax so that "VAR on TARGET ?= values" would be a syntax error. IMO strange, inconsistent and inconvinient. 2. Patch addsettings so that it handled default assignment correctly. The proposed patch implements the latter approach. The addsettings() function now accepts "setflag" (VAR_SET, VAR_ADD, VAR_DEFAULT) the same way as var_set() does, instead of logical "append" parameter. All addsettings() calls patched accordingly. Besides, it factors out the logic of converting ASSIGN_XXX compilation flag into corresponding VAR_XXX variable set flag into a separate static function. The patch is against CVS HEAD. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=307586&aid=1558580&group_i... ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Boost-bugs mailing list Boost-bugs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs