• Re: Building XFree86 for Raspberry Pi Zero - Problem with Includes

    From Computer Nerd Kev@3:770/3 to Computer Nerd Kev on Wed Feb 3 00:30:17 2021
    XPost: comp.os.linux.x, comp.windows.x

    In comp.sys.raspberry-pi Computer Nerd Kev <not@telling.you.invalid> wrote:

    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.

    It turns out the makedpend executable wasn't getting recompiled,
    and the include paths are actually compiled into it, so that's why
    the changes to linux.cf weren't doing anything.

    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: /usr/include/arm-linux-gnueabihf
    /usr/src/linux-headers-5.4.51+
    /usr/lib/gcc/arm-linux-gnueabihf/8/include

    "gcc -xc -E -v -" shows default include paths that GCC would use. "/usr/src/linux-headers-5.4.51+" isn't among them, but I got past
    the makedepend stage by adding header paths to lib/Xaw6/Imakefile.
    But then it started with compiler errors about wrong types, etc.

    It seems those problems are all in lib/Xaw/OS.c which includes
    <asm/page.h> as a fall-back method of determining the page size.
    This include has been commented out in the X.Org version of the
    file:
    https://gitlab.freedesktop.org/xorg/lib/libxaw/-/blob/master/src/OS.c
    so I just did that too and it worked (plus it no longer needs the
    extra include paths in lib/Xaw6/Imakefile).

    Actually it's still compiling now, but it got me further at the
    very least... Now it's stopped in lib/GLU/libnurbs/internals with
    a bunch of compiler errors related to this first one:

    "In file included from arc.cc:49:
    simplemath.h:56:13: error: 'REAL abs(REAL)' conflicts with a
    previous declaration
    abs( REAL x ) { return ( x < 0.0 ) ? -x : x; }
    ^
    "

    Removing the "#if" around this in extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/simplemath.h
    "#if defined(_SCO_DS) || defined(__SCO__)
    #define abs __gluabs
    #endif
    "
    seems to fix that. Looks like I might get there eventually...

    --
    __ __
    #_ < |\| |< _#

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  • From Eli the Bearded@3:770/3 to Computer Nerd Kev on Wed Feb 3 01:24:44 2021
    XPost: comp.os.linux.x, comp.windows.x

    In comp.windows.x, Computer Nerd Kev <not@telling.you.invalid> wrote:
    It turns out the makedpend executable wasn't getting recompiled,
    and the include paths are actually compiled into it, so that's why
    the changes to linux.cf weren't doing anything.

    Heh. Computers are so thoughtful.

    [snip tales of stumbling blocks]

    seems to fix that. Looks like I might get there eventually...

    Sounds like fun times.

    Elijah
    ------
    coercing something to compile can be so satisfying

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