Dropbear Compilation on IRIX 6.5 broken again (2020.80)

[Kazuo Kuroi]

Hi folks,

MIPSPro 7.4.4m on IRIX doesn't like svr-chansession.c again:

cc-1029 c99: ERROR File = svr-chansession.c, Line = 696
   An expression is expected at this point.

                 chansess->original_command = chansess->cmd ? : 
m_strdup("");
                                                              ^

cc-1053 c99: ERROR File = svr-chansession.c, Line = 696
   A colon is expected at this point.

                 chansess->original_command = chansess->cmd ? : 
m_strdup("");
^

2 errors detected in the compilation of "svr-chansession.c".
make: *** [svr-chansession.o] Error 2
make: *** Waiting for unfinished jobs....

I'm not sure how to exactly fix that, if anyone has any suggestions I 
can try that would be helpful, otherwise I can give access to a box if 
needed!

Thanks as always for keeping these changes upstream.

There's also a minor issue of the build system setting inappropriate 
flags for MIPSPro, such as -Wextra and -Wsystem-headers and such. I can 
work with someone to add a definition for MIPSPro to set the CFLAGS 
properly, I have a complete list around here somewhere. For now I just 
deleted those CFLAGS.

Best Regards,

Kazuo Kuroi