[MacPorts] #66176: lzma +universal fails to build: Undefined symbols for architecture i386: "_main", referenced from:

[MacPorts]

#66176: lzma +universal fails to build: Undefined symbols for architecture i386:
"_main", referenced from:
---------------------------+------------------------
  Reporter:  barracuda156  |      Owner:  ryandesign
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.0
Resolution:                |   Keywords:
      Port:  lzma          |
---------------------------+------------------------

Comment (by kencu):

 for both of these issues, likely the same problem.

 MacPorts sets up the proper environment and flags:

 {{{

 209     :debug:build CFLAGS='-Os -arch x86_64 -arch i386'
 210     :debug:build CPATH='/opt/local/include'
 211     :debug:build CPLUS_INCLUDE_PATH='/opt/local/include/LegacySupport'
 212     :debug:build CPPFLAGS='-isystem/opt/local/include/LegacySupport
 -I/opt/local/include'
 213     :debug:build
 CXX='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_archivers_lzma/lzma/work/compwrap/cxx/usr/bin/clang++'
 214     :debug:build CXXFLAGS='-Os -arch x86_64 -arch i386 -stdlib=libc++'
 }}}

 but this build doesn't use any of them, it appears.
 {{{
 usr/bin/clang     -O2 -c -Wall -Wextra  -DNDEBUG -D_REENTRANT
 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC  -o _o/7zCrc.o
 ../../../../C/7zCrc.c

 /usr/bin/clang++     -O2 -c -Wall -Wextra  -DNDEBUG -D_REENTRANT
 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC   -o _o/FileDir.o
 ../../../Windows/FileDir.cpp
 }}}

 so anything non-standard (ie where the default build from the compiler is
 not doing what we want) will fail.

-- 
Ticket URL: <https://trac.macports.org/ticket/66176#comment:2>
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