[MacPorts] #59108: mercurial 5.1: fails to build with "ld: library not found for -lSystem"

[MacPorts]

#59108: mercurial 5.1: fails to build with "ld: library not found for -lSystem"
----------------------------+--------------------
  Reporter:  ylluminarious  |      Owner:  jmroot
      Type:  defect         |     Status:  closed
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.6.0
Resolution:  fixed          |   Keywords:
      Port:  mercurial      |
----------------------------+--------------------
Changes (by jmroot):

 * status:  new => closed
 * owner:  (none) => jmroot
 * resolution:   => fixed


Comment:

 In [changeset:"efb1b95f2d20f268aafb7026cdd0c75e059c5db2/macports-ports"
 efb1b95f2d20f268aafb7026cdd0c75e059c5db2/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="efb1b95f2d20f268aafb7026cdd0c75e059c5db2"
 python pg: support Mojave with /usr/include

 Some users may have installed the optional package that provides system
 headers in /usr/include.

 Fixes: https://trac.macports.org/ticket/59108
 }}}

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Ticket URL: <https://trac.macports.org/ticket/59108#comment:5>
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