[Bug sanitizer/60892] New: GCC fails to build with Linux 2.6.21 headers.

[toojays at toojays dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60892

            Bug ID: 60892
           Summary: GCC fails to build with Linux 2.6.21 headers.
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: toojays at toojays dot net
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org

I got the following errors while trying to build gcc-4.9 (from the 20140416
snapshot) for a Linux 2.6.21 system (Maemo 4 / diablo). Configuration was run
via 

../gcc-4.9-20140416/configure --program-suffix=-4.9 --disable-shared
--enable-languages=c,c++ --enable-checking=release

I got not complaints from the, but the build failed at:

xgcc -B/home/maemo/gcc-4.9-20140416/build-dir/./gcc/
-B/usr/i686-pc-linux-gnu/bin/ -B/usr/i686-pc-linux-gnu/lib/ -isystem
/usr/i686-pc-linux-gnu/include -isystem /usr/i686-pc-linux-gnu/sys-include   
-DHAVE_CONFIG_H -I. -I../../../gcc-4.9-20140416/libquadmath  -I
../../../gcc-4.9-20140416/libquadmath/../include   -g -O2 -MT math/catanq.lo
-MD -MP -MF $depbase.Tpo -c -o math/catanq.lo
../../../gcc-4.9-20140416/libquadmath/math/catanq.c &&\
    mv -f $depbase.Tpo $depbase.Plo
../../../../gcc-4.9-20140416/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:390:30:
error: 'EVIOCGREP' was not declared in this scope
   unsigned IOCTL_EVIOCGREP = EVIOCGREP;
                              ^
../../../../gcc-4.9-20140416/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:399:30:
error: 'EVIOCSREP' was not declared in this scope
   unsigned IOCTL_EVIOCSREP = EVIOCSREP;
                              ^
../../../../gcc-4.9-20140416/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:682:36:
error: 'FS_IOC_GETFLAGS' was not declared in this scope
   unsigned IOCTL_FS_IOC_GETFLAGS = FS_IOC_GETFLAGS;
                                    ^
../../../../gcc-4.9-20140416/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:683:38:
error: 'FS_IOC_GETVERSION' was not declared in this scope
   unsigned IOCTL_FS_IOC_GETVERSION = FS_IOC_GETVERSION;
                                      ^
../../../../gcc-4.9-20140416/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:684:36:
error: 'FS_IOC_SETFLAGS' was not declared in this scope
   unsigned IOCTL_FS_IOC_SETFLAGS = FS_IOC_SETFLAGS;
                                    ^
../../../../gcc-4.9-20140416/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:685:38:
error: 'FS_IOC_SETVERSION' was not declared in this scope
   unsigned IOCTL_FS_IOC_SETVERSION = FS_IOC_SETVERSION;


http://gcc.gnu.org/install/specific.html does not mention a minimum kernel
version for GCC.

http://gcc.gnu.org/install/configure.html does not explain how to disable
building the sanitizer.

I don't particularly mind if I can't have the sanitizer, but expect the GCC
configure script to detect that, and disable the sanitizer build automatically.

This bug is similar in spirit to bug 59068, but I'm filing a separate issue
since the root cause is different.