First, yes I have heard of X.Org. Unfortunately its changelog shows
that they removed the XAA subsystem, saying that it had been broken
for some unspecified period of time before that as well. I
specifically want to use/hack XAA, so I want to start with code
where it's working from the outset, hence XFree86.
As XFree86 supports building on 32bit ARM, I thought building on a
Pi Zero running RPi OS 10 would be... Well not easy, but I wasn't
expecting this. So far I haven't got past the makedepend stage.
The main problem is that I haven't been able to find a good place
for setting extra system include directories to be checked by
makedepend (more "-I<dir>" options). I tried adding PreIncDir and
ExtraIncDir defines in config/cf/linux.cf
, based on other
config/cf/*.cf files, but that did nothing. So it fails to find
a whole heap of header files that _aren't_ in /usr/include (or the
right position therein).
I'm also a bit unclear about which directories should be looked in
for those headers. I've found various headers (often multiple files
with the same name) that it complains are missing in:
But there's also issues with it looking for includes such as
"asm/mmiowb.h" which actually are only found in eg.
"asm-generic/mmiowb.h" or "generated/asm/mmiowb.h" (which just
I've been having some apparent success by adding symlinks to other
system include directories in xc/exports/include, then running "make
Everything" (the links there all get deleted when you do a "make
World"). But the problems I'm having now are screaming that I'm
doing it the wrong way, with "conflicting type" errors and an
apparantly broken macro, etc.
So my key questions are:
1. Where do I specifiy additional include paths to be passed to
imake/makedepend when I do a "make World" for XFree86?
2. Am I including headers from the right directories? Or is there
another kernel header package that I need to install (currently
I've just got raspberrypi-kernel-headers)?
Here's a bit from the end of the compile log where the build
currently fails, giving an example of the multiple problems from
the kernel header includes (the build has got a lot further than
this before, but then it reports lots of "cannot find include
file" warnings, and eventually dies with "Floating point exception"
../../../../../config/makedepend/makedepend: warning: mmapr.c
(reading ../../../../../exports/include/linux/jiffies.h), line 42:
# error Invalid value of HZ.
, and adding symlinks in xc/exports/include to fix that leads to
../../exports/include/linux/types.h:26:26: error: conflicting types for 'timer_t
typedef __kernel_timer_t timer_t;
In file included from ../../exports/include/sys/types.h:130,
../../exports/include/bits/types/timer_t.h:7:19: note: previous declaration of '
timer_t' was here
typedef __timer_t timer_t;
In file included from ../../exports/include/linux/limits.h:6,
../../exports/include/linux/types.h:131:13: error: conflicting types for 'blkcnt_t'
typedef u64 blkcnt_t;
In file included from /usr/include/stdlib.h:394,
../../exports/include/sys/types.h:209:20: note: previous declaration of 'blkcnt_t' was here
typedef __blkcnt_t blkcnt_t; /* Type to count number of disk blocks. */
In file included from ../../exports/include/bits/local_lim.h:38,
../../exports/include/bits/xopen_lim.h:99:5: error: missing binary operator before token "("
#if INT_MAX == 32767
../../exports/include/bits/xopen_lim.h:102:5: error: missing binary operator before token "("
#if INT_MAX == 2147483647
../../exports/include/bits/xopen_lim.h:126:5: error: missing binary operator before token "("
#if LONG_MAX == 2147483647
make: *** [<builtin>: imake.o] Error 1
#_ < |\| |< _#