[Bug build/17007] Check Scanf15 bits/syscall.h No such file

["naroyce at hotmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17007

--- Comment #6 from naroyce at hotmail dot com ---
(In reply to joseph@codesourcery.com from comment #5)
> On Tue, 3 Jun 2014, naroyce at hotmail dot com wrote:
> 
> The glibc build should never be using the installed headers; those in 
> include/ in the source tree should take precedence (which includes the 
> dummy gnu/stubs.h file in include/).

Ugh, you're right. I had set the *FLAGS environmental variables and the
CPPFLAGS DID point to the LFS built tools directory. That's why it WOULD
compile if I overrode the CPPFLAGS.
However it still fails the check ("compilation terminated") "scanf15". After
various attempts with various FLAG settings, I finally ended up going barebones
with NO FLAGS, just let GLIBC do whatever it wanted, and "check" still bonked
at scanf15:

config.log
 $ ../glibc/configure --prefix=/usr --disable-profile --enable-kernel=3.8.13
--libexecdir=/media/ddodroid/usr/lib/glibc --enable-obsolete-rpc
--with-headers=/media/ddodroid/usr/include
 CXXFLAGS='-g -O2'
 CXX_SYSINCLUDES=' -isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/../../../../include/c++/4.10.0
-isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/../../../../include/c++/4.10.0/armv7l-unknown-linux-gnueabihf
-isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/../../../../include/c++/4.10.0/backward'

make.log
 mv -f /media/tmp/glibcBuildNFlags/sysd-sorted-tmp
/media/tmp/glibcBuildNFlags/sysd-sorted
 { echo '#include "posix/bits/posix1_lim.h"';        \
   echo '#define _LIBC 1';                    \
   echo '#include "misc/sys/uio.h"'; } |            \
 mkdir -p -- /media/tmp/glibcBuildNFlags/misc/bits
 { \
  echo '/* Generated at libc build time from kernel syscall list.  */';\
  echo ''; \
  echo '#ifndef _SYSCALL_H'; \
  echo '# error "Never use <bits/syscall.h> directly; include <sys/syscall.h>
instead."'; \
  echo '#endif'; \
  echo ''; \
   \
  echo ''; \
   gcc -ffreestanding -E -MD -MP -MF
/media/tmp/glibcBuildNFlags/misc/bits/syscall.d-tsoft -MT
'/media/tmp/glibcBuildNFlags/misc/bits/syscall.h
/media/tmp/glibcBuildNFlags/misc/bits/syscall.d' -x c -nostdinc -isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/include
-isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/include-fixed
-isystem /media/ddodroid/usr/include ../sysdeps/unix/sysv/linux/sys/syscall.h
-U__ARM_PCS_VFP -D_LIBC -dM | sed -n 's@^#define __NR_\([^ ]*\) .*$@#define
SYS_\1 __NR_\1@p' | LC_ALL=C sort >
/media/tmp/glibcBuildNFlags/misc/bits/syscall.h.newsoft;  echo '#if !defined
__ARM_PCS_VFP'; cat /media/tmp/glibcBuildNFlags/misc/bits/syscall.h.newsoft;
echo '#endif'; rm -f /media/tmp/glibcBuildNFlags/misc/bits/syscall.h.newsoft;  
gcc -ffreestanding -E -MD -MP -MF
/media/tmp/glibcBuildNFlags/misc/bits/syscall.d-thard -MT
'/media/tmp/glibcBuildNFlags/misc/bits/syscall.h
/media/tmp/glibcBuildNFlags/misc/bits/syscall.d' -x c -nostdinc -isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/include
-isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/include-fixed
-isystem /media/ddodroid/usr/include ../sysdeps/unix/sysv/linux/sys/syscall.h
-D__ARM_PCS_VFP -D_LIBC -dM | sed -n 's@^#define __NR_\([^ ]*\) .*$@#define
SYS_\1 __NR_\1@p' | LC_ALL=C sort >
/media/tmp/glibcBuildNFlags/misc/bits/syscall.h.newhard;  echo '#if defined
__ARM_PCS_VFP'; cat /media/tmp/glibcBuildNFlags/misc/bits/syscall.h.newhard;
echo '#endif'; rm -f /media/tmp/glibcBuildNFlags/misc/bits/syscall.h.newhard; 
\
} > /media/tmp/glibcBuildNFlags/misc/bits/syscall.h.new
 *****I see this contains -D_LIBC, however there are others in make.log that
contain -DNOT_IN_libc=1

check.log
gcc scanf15.c -c -std=gnu99 -fgnu89-inline  -O2 -Wall -Winline -Wundef
-Wwrite-strings -fmerge-all-constants -frounding-math -g -Wstrict-prototypes  
-I../libio -I../stdlib -I../wcsmbs -I../time -I../string -I../wctype      
-I../include -I/media/tmp/glibcBuildNFlags/stdio-common 
-I/media/tmp/glibcBuildNFlags  -I../sysdeps/unix/sysv/linux/arm 
-I../nptl/sysdeps/unix/sysv/linux  -I../nptl/sysdeps/pthread 
-I../sysdeps/pthread  -I../sysdeps/unix/sysv/linux  -I../sysdeps/gnu 
-I../sysdeps/unix/inet  -I../nptl/sysdeps/unix/sysv  -I../sysdeps/unix/sysv 
-I../sysdeps/unix/arm  -I../nptl/sysdeps/unix  -I../sysdeps/unix 
-I../sysdeps/posix  -I../sysdeps/arm/nptl  -I../sysdeps/arm/include
-I../sysdeps/arm  -I../sysdeps/arm/soft-fp  -I../sysdeps/wordsize-32 
-I../sysdeps/ieee754/flt-32  -I../sysdeps/ieee754/dbl-64  -I../sysdeps/ieee754 
-I../sysdeps/generic  -I../nptl  -I.. -I../libio -I. -nostdinc -isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/include
-isystem
/armv7l-unknown-linux-gnueabihf/lib/gcc/armv7l-unknown-linux-gnueabihf/4.10.0/include-fixed
-isystem /media/ddodroid/usr/include  -D_LIBC_REENTRANT -include
../include/libc-symbols.h   -DNOT_IN_libc=1    -D_IO_MTSAFE_IO -o
/media/tmp/glibcBuildNFlags/stdio-common/scanf15.o -MD -MP -MF
/media/tmp/glibcBuildNFlags/stdio-common/scanf15.o.dt -MT
/media/tmp/glibcBuildNFlags/stdio-common/scanf15.o
In file included from ../misc/sys/param.h:28:0,
                 from ../include/sys/param.h:1,
                 from ../sysdeps/unix/sysv/linux/arm/lowlevellock.h:22,
                 from ../nptl/sysdeps/pthread/bits/stdio-lock.h:23,
                 from ../libio/libio.h:149,
                 from ../libio/stdio.h:74,
                 from scanf15.c:10:
../include/signal.h:44:15: warning: 'struct sigvec' declared inside parameter
list
        struct sigvec *__ovec);
               ^
../include/signal.h:44:15: warning: its scope is only this definition or
declaration, which is probably not what you want
In file included from ../sysdeps/unix/sysdep.h:20:0,
                 from ../sysdeps/unix/arm/sysdep.h:18,
                 from ../sysdeps/unix/sysv/linux/arm/sysdep.h:24,
                 from ../sysdeps/unix/sysv/linux/arm/lowlevellock.h:25,
                 from ../nptl/sysdeps/pthread/bits/stdio-lock.h:23,
                 from ../libio/libio.h:149,
                 from ../libio/stdio.h:74,
                 from scanf15.c:10:
../sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error: bits/syscall.h: No
such file or directory
 # include <bits/syscall.h>
 *****As you can see, it is still failing and trying to call "bits/syscall.h".
And none of the tests through this test contain D_LIBC, but rather
DNOT_IN_libc=1.

I would question whether I need to add D_LIBC to the flags except for it was
already "echoed" as shown in make.log

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