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Improve consistency of --enable-kernel and default builds.

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This commit is contained in:
Joseph Myers
2012-05-14 22:22:52 +00:00
parent 11de3a3371
commit 37f1abd46c
3 changed files with 28 additions and 30 deletions
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26
sysdeps/unix/sysv/linux/configure.in
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@@ -87,29 +87,25 @@ if test -n "$minimum_kernel"; then
minimum_kernel=$arch_minimum_kernel
fi
else
if test $arch_minimum_kernel != '2.2.0'; then
minimum_kernel=$arch_minimum_kernel
fi
minimum_kernel=$arch_minimum_kernel
fi
if test -n "$minimum_kernel"; then
AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
changequote(,)dnl
decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
changequote([,])dnl
AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
#if LINUX_VERSION_CODE < $decnum
eat flaming death
#endif], libc_minimum_kernel='too old!', libc_minimum_kernel=ok)
AC_MSG_RESULT($libc_minimum_kernel)
if test "$libc_minimum_kernel" = ok; then
AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
else
AC_MSG_ERROR([*** The available kernel headers are older than the requested
AC_MSG_RESULT($libc_minimum_kernel)
if test "$libc_minimum_kernel" = ok; then
AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
else
AC_MSG_ERROR([*** The available kernel headers are older than the requested
*** compatible kernel version])
fi
fi
# The result of the above test for the use of the FDE code is invalid if