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Bug#661440: libexplain FTBFS on Alpha: linux/ac/sys/types.h: No such file or directory

Source: libexplain
Version: 0.51.D001-1
Severity: normal
User: debian-alpha@lists.debian.org
Usertags: alpha
X-Debbugs-CC: debian-alpha@lists.debian.org

libexplain FTBFS on Alpha with the following:

libtool: compile:  gcc -Wall -g -O2 -Wall -Wextra -Wl,--as-needed -I. -c
libexplain/buffer/eio.c  -fPIC -DPIC -o libexplain/buffer/.libs/eio.o
In file included from libexplain/buffer/eio.c:22:0:
./libexplain/ac/fcntl.h:35:32: fatal error: linux/ac/sys/types.h: No
such file or directory

Full build log is available at:

The compilation fails because of some trickery in the file
libexplain/ac/fcntl.h, namely:

#if defined(__alpha__) && defined(HAVE_LINUX_FCNTL_H)
#include <libexplain/ac/linux/types.h> /* Ubuntu Hardy needs this first */
/* This is very strange, but numerous tests fail if we use <fcntl.h>
   because is appears to have several incorrect macro definitions */
#include <linux/ac/sys/types.h>
#include <linux/fcntl.h>

I'm not sure why a compilation path unique to Alpha is present but I
found the following in the libexplain changelog which seems relevant:

libexplain  (0.35.D006-1) unstable; urgency=low
* A build problem concerning <fcntl.h> has been fixed: it turns out that
on Liunux [sic] alpha <fcntl.h> has the wrong values for O_LARGEFILE and
O_DIRECTORY, and you must use <linux/fcntl.h> instead.

I find that comment somewhat mystifying as O_LARGEFILE is defined to be
0, which I believe to be correct as _all_ files are by default and by
design O_LARGEFILE, and O_DIRECTORY is defined to be 0100000 which is
the same as is in the linux kernel source.  (They may not be the same as
x86 which is not a problem.)

I ran a test build where I had commented out the Alpha specific code in
libexplain/ac/fcntl.h so it would use the standard code that every other
architecture uses and the compilation passed that point and went on for
a lot further until it failed with:

libtool: compile:  gcc -Wall -g -O2 -Wall -Wextra -Wl,--as-needed -I. -c
libexplain/iocontrol/tiocgetp.c  -fPIC -DPIC -o
libexplain/iocontrol/tiocgetp.c:31:5: error: invalid application of
'sizeof' to incomplete type 'struct sgttyb'

That is due to use of the TIOCGETP macro.  It appears that <termios.h>
only declares 'struct sgttyb' but does not define it so the sizeof
operator on struct sgttyb fails.  Struct sgttyb is defined in:


but I haven't been able to work out why that is not being included.
It's getting late so I am filing the bug report at this stage.


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