[macports-legacy-support] branch master updated (2d1e8d3 -> 170f17c)

[Ken]

Ken (kencu) pushed a change to branch master
in repository macports-legacy-support.

    from 2d1e8d3  Add support for fls,flsl (OSX10.4 and older) and flsll (macOS10.9 and older)
     add 170f17c  simplify documentation

No new revisions were added by this update.

Summary of changes:
 BUILDING.txt | 40 +++++++++++++++++++++++++++++++++
 README.md    | 73 ++++++++----------------------------------------------------
 2 files changed, 49 insertions(+), 64 deletions(-)
 create mode 100644 BUILDING.txt