[MacPorts] #46040: llvm-3.5, llvm-3.6: libLTO uses libedit, ncurses, zlib without declaring dependencies (was: libgcc build failure)

[MacPorts]

#46040: llvm-3.5, llvm-3.6: libLTO uses libedit, ncurses, zlib without declaring
dependencies
--------------------------------+----------------------
  Reporter:  pj@…               |      Owner:  larryv@…
      Type:  defect             |     Status:  assigned
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.3.3
Resolution:                     |   Keywords:
      Port:  llvm-3.5 llvm-3.6  |
--------------------------------+----------------------
Changes (by larryv@…):

 * cc: mww@… (removed)
 * cc: jeremyhu@… (added)
 * port:  libgcc => llvm-3.5 llvm-3.6


Comment:

 The OP sent me [[attachment:main.2.log|a complete log]] via email.
 {{{
 :info:build collect2: error: ld terminated with signal 5 [Trace/BPT trap:
 5]
 :info:build dyld: Library not loaded: /opt/local/lib/libedit.0.dylib
 :info:build   Referenced from:
 /opt/local/libexec/llvm-3.5/lib/libLTO.dylib
 :info:build   Reason: image not found
 }}}
 It’s not clear to me why `libLTO.dylib` links to libedit, and the
 `llvm-3.5` port does not declare a dependency on the `libedit` port. On my
 system, libLTO uses libraries from `zlib`, `libffi`, `libedit`, and
 `ncurses` — only one of which `llvm-3.6` declares a dependency on:
 {{{
 % otool -L /opt/local/libexec/llvm-3.6/lib/libLTO.dylib
 /opt/local/libexec/llvm-3.6/lib/libLTO.dylib:
         /opt/local/libexec/llvm-3.6/lib/libLTO.dylib (compatibility
 version 0.0.0, current version 0.0.0)
         /opt/local/libexec/llvm-3.6/lib/libLLVM-3.6svn.dylib
 (compatibility version 0.0.0, current version 0.0.0)
         /opt/local/lib/libz.1.dylib (compatibility version 1.0.0, current
 version 1.2.8)
         /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
 version 1213.0.0)
         /opt/local/lib/libffi.6.dylib (compatibility version 7.0.0,
 current version 7.4.0)
         /opt/local/lib/libedit.0.dylib (compatibility version 1.0.0,
 current version 1.51.0)
         /opt/local/lib/libncurses.5.dylib (compatibility version 5.0.0,
 current version 5.0.0)
         /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current
 version 120.0.0)
 % port deps llvm-3.6
 Full Name: llvm-3.6 @3.6-r222672_0+assertions
 Fetch Dependencies:   subversion
 Library Dependencies: libffi, libcxx
 Runtime Dependencies: perl5, llvm_select
 %
 }}}
 You must have removed `libedit` at some point, and MacPorts didn’t stop
 you because `llvm-3.5` doesn’t claim to require it. You can work around
 this by reinstalling `libedit`.

 Jeremy, does libLTO really use these libraries?

-- 
Ticket URL: <https://trac.macports.org/ticket/46040#comment:7>
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