[MacPorts] #17865: deleting all default configure flags causes error.

[MacPorts]

#17865: deleting all default configure flags causes error.
--------------------------------+-------------------------------------------
 Reporter:  tonytung@…          |       Owner:  macports-tickets@…                   
     Type:  defect              |      Status:  new                                  
 Priority:  Normal              |   Milestone:                                       
Component:  base                |     Version:  1.7.0                                
 Keywords:  cppflags ldflags    |        Port:  tcl                                  
--------------------------------+-------------------------------------------
 In the tcl port, -I${prefix}/include is removed from cppflags:


 {{{
 configure.cppflags-delete  -I${prefix}/include
 }}}

 When handle_option-delete processes this, it yields an empty string and
 unsets the option.


 {{{
 ##
 # Handle option-delete
 #
 # @param option name of the option
 # @param args arguments
 proc handle_option-delete {option args} {
     global $option user_options option_procs

     if {![info exists user_options($option)] && [info exists $option]} {
         set temp [set $option]
         foreach val $args {
             set temp [ldelete $temp $val]
         }
         if {$temp eq ""} {
             unset $option
         } else {
             set $option $temp
         }
     }
 }
 }}}


 This results in portconfigure.tcl declaring ${configure.cppflags} as an
 unknown variable in configure_main(..), yielding this error message:

 {{{
 Error: Target org.macports.configure returned: can't read
 "configure.cppflags": no such variable
 }}}


 Replacing these lines:

 {{{
 append_list_to_environment_value configure "CPPFLAGS"
 ${configure.cppflags}
 append_list_to_environment_value configure "LDFLAGS" ${configure.ldflags}
 }}}

 with:

 {{{
 catch {append_list_to_environment_value configure "CPPFLAGS"
 ${configure.cppflags}}
 catch {append_list_to_environment_value configure "LDFLAGS"
 ${configure.ldflags}}
 }}}

 seems to do the trick (i.e., everything builds fine).

-- 
Ticket URL: <http://trac.macports.org/ticket/17865>
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