IRIX support

[umlaeute]

it would be nice if pd-lib-builder recognized IRIX as a system.

it's very similar to the "Linux" system we already have, except that:

• the latest(?, at least the one commonly found on those systems) gcc is GCC-3.3
• for calculating the dependencies we might need to provide special flags to the compiler.
  • sometimes we need specific compiler flags for a given build, which the user can provide with CPPFLAGS, CFLAGS and CXXFLAGS; however these flags are not used for the depcheck:

    pd-lib-builder/Makefile.pdlibbuilder

    Lines 667 to 668 in 7752526

    	# flags for dependency checking (cflags from makefile may define -I options)
    	depcheck.flags := $(cpp.flags) $(cflags)

  • we could use cflags, but this is not a user-facing variable, and passing it on the cmdline (e.g. make cflags=-std=c99), will completely override any cflags set in the library specific Makefile ☹️
  • we could also set the cflags in the library specific Makefile, but that doesn't really work if the flags are very specific to the compiler on the system ☹️
  • so ideally we would be able to inject some (additional) depcheckflags
• the default file extension (.pd_irix6 or .pd_irix5)
• the warn.flags

  pd-lib-builder/Makefile.pdlibbuilder

  Line 655 in 7752526

  warn.flags = -Wall -Wextra -Wshadow -Winline -Wstrict-aliasing

  include flags that are not yet available (-Wextra) and that seem to trigger on false positives (-Winline)

since I'm not entirely convinced whether adding support for such a niche system is actually desirable/worth it, I'll try to see if I can make it work with simply passing the right vars to make (in which case I guess we can consider this feature request moot)