Creating a kos-port with multiple header directories

[bogglez]

I wanted to create a port for a library which installs headers in two different directories, but the kos-port Makefile syntax only seems to allow a single directory.
How should I fix this?

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INSTALLED_HDRS = include/EGL/egl.h include/KHR/khrplatform.h
HDR_INSTDIR = # need EGL and KHR here

[BlueCrab]

Well, that's the first time that's come up... There's not a way to do it in kos-ports as it stands now, besides splitting it into two ports.

Is there some reason that what you're doing shouldn't be split up into two ports? Usually one library doesn't take over two directories of header files, after all...

I mean, it could certainly be added (or a more general "post-install" script type thing could be added which would allow you to do what you want).

[bogglez]

This is not a set of libraries that I have designed, but a standards consortium.. so yeah.
I think in the light of this the kos-ports Makefile syntax makes too many assumptions how libraries install.
I found two issues:

1. As mentioned, I can't install to multiple directories
Example: libEGL installs headers to EGL/ and KHR/

2. Multiple libraries cannot install to the same subdirectory
Example: libGL installs GL/gl.h, but freeglut installs GL/glut.h, too.

So in this second issue I mentioned I cannot install multiple headers because the files are not copied, but the directories are symlinked.
I think it would be better to copy the headers in the install step and delete directories when they're empty.

[bogglez]

I took a look at the BSD ports system because I wasn't aware of its internals, but it seems to have such postinstall hooks, while it lacks the header installation stuff, so I think it's the way to go.

And I wonder whether there could be support for GNU-style make install? E.g. given a file like below, calling

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make install CC=kos-cc prefix=/opt/toolchains/dc/kos-ports/

should work. All the kos-port needs is meta data like dependencies, but no install instructions. This way the official Makefiles can be used.
The kos-port would only need to pass in CC etc. properly, since projects assume to be built without KOS.

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INSTALL=install
INSTALL_DATA=${INSTALL} -m 644
INSTALL_PROGRAM=$(INSTALL)

prefix=/usr/local
exec_prefix=$(prefix)
includedir=$(prefix)/include
libdir=$(exec_prefix)/lib

CC       = gcc
ARFLAGS  = rcs
CPPFLAGS = -DLIBGL15_FSAA
CFLAGS   = -Iinclude -std=gnu11 -Ofast

libGL.a: $(patsubst %.c,libGL.a(%.o),$(wildcard *.c))

clean:
        $(RM) $(wildcard *.o)

distclean:
        $(RM) $(wildcard *.o *.a)

installdirs:
        mkdir -p $(DESTDIR)$(libdir) $(DESTDIR)$(includedir)/GL

install: libGL.a installdirs
        $(INSTALL_DATA) $(addprefix include/GL/,gl.h glu.h) $(DESTDIR)$(includedir)/GL
        $(INSTALL_DATA) libGL.a $(DESTDIR)$(libdir)

uninstall:
        $(RM) $(addprefix $(DESTDIR)$(includedir)/GL/,gl.h glu.h)
        rmdir $(DESTDIR)$(includedir)/GL