boost program_options shared_ptr instead of raw pointer

[smanders]

boost 1.67.0 patch externpro-archive/program_options#1
boost 1.76.0 patch externpro-archive/program_options#2
see boostorg/program_options#109 for details

[smanders]

the patch includes both changes to cpp and hpp files, which is different than any of our existing boost patches (all header-only)

so I'll have to see if there is anything different I need to do with SUBDIR and PATCH_STRIP...

externpro/projects/boostasio1_67.cmake

Line 9 in 25b462e

SUBDIR . # since the patch is all headers, apply to root of boost, not libs/asio

externpro/projects/boostasio1_67.cmake

Line 21 in 25b462e

PATCH_STRIP 2 # Strip NUM leading components from file names (defaults to 1)

I was pretty sure we'd patched a boost library before that contained both cpp and hpp files, so I went looking through the history -- and it appears we did for boost::iostreams and I broke it out into two patches

• externpro-archive/iostreams@boost-1.57.0...xp1.57.0
• externpro-archive/iostreams@boost-1.57.0...xphpp1.57.0

but I didn't ever commit the externpro project files that used these patches as it turned out they weren't needed for the "build boost with zlib support" feature

• build boost with zlib support #14
• build boost iostreams with zlib and bzip2 support #63

[smanders]

the include/ changes have to be in a separate patch from the src/ and test/ changes because the patches are applied to the boost tar.bz2

• include/boost/program_options/ changes need to be applied to boost/program_options in the root
  • SUBDIR . and PATCH_STRIP 2
• src/ and test/ changes need to be applied to libs/program_options/
  • SUBDIR ./libs/program_options/ and PATCH_STRIP 1

[smanders]

• patch src/ and test/ boostorg/program_options@boost-1.67.0...smanders:xp1.67.0
• patch include/ boostorg/program_options@boost-1.67.0...smanders:xphpp1.67.0

[smanders]

completed with commit referenced above