Use system path for more tools, for Linux compat.

Closes #22196.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libftdi 1.0

Closes #21758.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
apt-cacher-ng 0.7.18

Closes #22227.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Show list of dependencies prior to installing them

Closes #22205.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Remove PATH hack from ENV.fortran
Analog 6.0

Closes #21477.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
SDL2_net 2.0.0

Closes #22225.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Simplify handling custom FCFLAGS
lnav 0.6.0

Closes #22228.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
ENV: add cc and cxx setters
ENV: use cc accessor
ENV: use cflags setter
Fix conditional in ENV.fortran
ENV: use fc accessor
ENV: only set fortran flags in one place
signing-party: gpgparticipants: not working on OSX

```data``` on OSX behave differently from the linux version.

Closes #21628.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
signing-party: style nits
wxmac: add arch flags

When using as a dependency for SAGA GIS, the missing architecture flags causes
it to fail. These extra flags help it compile correctly.

Closes #21179.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
sqlite 3.8.0.1

Closes #22213.

Signed-off-by: Xiyue Deng <manphiz@gmail.com>
sphinx 2.0.9

Closes #22237.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>