More flags clang dislikes
rrdtool: respect CC/CXX when building ruby bindings

Fixes #27730.
fltk: fix build with clang 3.4

Fixes #27404.
Closes #27531.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
vowpal wabbit 7.5

Closes #27762.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
dos2unix 6.0.5-beta11 (devel)

Closes #27764.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
wiggle 1.0