d0f5b3f851
This patch increases the minimum Linux kernel version for glibc to 2.6.32, as discussed in the thread starting at <https://sourceware.org/ml/libc-alpha/2014-01/msg00511.html>. This patch just does the minimal change to arch_minimum_kernel settings (and LIBC_LINUX_VERSION, which determines the minimum kernel headers version, as it doesn't make sense for that to be older than the minimum kernel that can be used at runtime). Followups would be expected to do, roughly and not necessarily precisely in this order: * Remove __LINUX_KERNEL_VERSION checks in kernel-features.h files where those checks are always true / always false for kernels 2.6.32 and above. * Otherwise simplify/improve conditionals in those files (for example, where defining once in the main file then undefining in architecture-specific files makes things clearer than having lots of separate definitions of the same macro), possibly fixing in the process cases where a macro should optimally have been defined for a given architecture but wasn't. (In the review in preparation for this version increase I checked what the right conditions should be for all macros in the main kernel-features.h whose definitions there would have been affected by the increase - but I only fixed that subset of the issues found where --enable-kernel=2.6.32 would have caused a kernel feature to be wrongly assumed to be present, not any cases where a feature is not assumed but could be assumed.) * Remove conditionals on __ASSUME_* where they can now be taken to be always-true, and the definitions when the macros are only used in Linux-specific files. * Split more architectures out of the main kernel-features.h (like ex-ports architectures), once various of the architecture conditionals there have been eliminated so the new architecture-specific files are no larger than actually necessary. Tested x86_64. 2014-03-27 Joseph Myers <joseph@codesourcery.com> [BZ #9894] * sysdeps/unix/sysv/linux/configure.ac (LIBC_LINUX_VERSION): Change to 2.6.32. (arch_minimum_kernel): Change all 2.6.16 settings to 2.6.32. * sysdeps/unix/sysv/linux/configure: Regenerated. * sysdeps/unix/sysv/linux/microblaze/configure.ac: Remove file. * sysdeps/unix/sysv/linux/microblaze/configure: Likewise. * sysdeps/unix/sysv/linux/tile/configure.ac: Likewise. * sysdeps/unix/sysv/linux/tile/configure: Likewise. * README: Update reference to required Linux kernel version. * manual/install.texi (Linux): Update reference to required Linux kernel headers version. * INSTALL: Regenerated.
426 lines
13 KiB
Plaintext
426 lines
13 KiB
Plaintext
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# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
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# -------------------------------------------------------
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# Tests whether HEADER exists and can be compiled using the include files in
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# INCLUDES, setting the cache variable VAR accordingly.
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ac_fn_c_check_header_compile ()
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{
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as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
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$as_echo_n "checking for $2... " >&6; }
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if eval \${$3+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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$4
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#include <$2>
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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eval "$3=yes"
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else
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eval "$3=no"
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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eval ac_res=\$$3
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
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$as_echo "$ac_res" >&6; }
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eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
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} # ac_fn_c_check_header_compile
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# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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# Local configure fragment for sysdeps/unix/sysv/linux.
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# Don't bother trying to generate any glue code to be compatible with the
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# existing system library, because we are the only system library.
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inhibit_glue=yes
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if test -n "$sysheaders"; then
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OLD_CPPFLAGS=$CPPFLAGS
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CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
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$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
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if ${ac_cv_path_GREP+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test -z "$GREP"; then
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ac_path_GREP_found=false
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# Loop through the user's path and test for each of PROGNAME-LIST
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_prog in grep ggrep; do
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for ac_exec_ext in '' $ac_executable_extensions; do
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ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
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{ test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue
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# Check for GNU ac_path_GREP and select it if it is found.
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# Check for GNU $ac_path_GREP
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case `"$ac_path_GREP" --version 2>&1` in
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*GNU*)
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ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
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*)
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ac_count=0
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$as_echo_n 0123456789 >"conftest.in"
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while :
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do
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cat "conftest.in" "conftest.in" >"conftest.tmp"
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mv "conftest.tmp" "conftest.in"
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cp "conftest.in" "conftest.nl"
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$as_echo 'GREP' >> "conftest.nl"
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"$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
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diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
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as_fn_arith $ac_count + 1 && ac_count=$as_val
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if test $ac_count -gt ${ac_path_GREP_max-0}; then
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# Best one so far, save it but keep looking for a better one
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ac_cv_path_GREP="$ac_path_GREP"
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ac_path_GREP_max=$ac_count
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fi
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# 10*(2^10) chars as input seems more than enough
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test $ac_count -gt 10 && break
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done
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rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
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esac
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$ac_path_GREP_found && break 3
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done
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done
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done
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IFS=$as_save_IFS
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if test -z "$ac_cv_path_GREP"; then
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as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
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fi
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else
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ac_cv_path_GREP=$GREP
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
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$as_echo "$ac_cv_path_GREP" >&6; }
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GREP="$ac_cv_path_GREP"
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
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$as_echo_n "checking for egrep... " >&6; }
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if ${ac_cv_path_EGREP+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
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then ac_cv_path_EGREP="$GREP -E"
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else
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if test -z "$EGREP"; then
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ac_path_EGREP_found=false
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# Loop through the user's path and test for each of PROGNAME-LIST
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_prog in egrep; do
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for ac_exec_ext in '' $ac_executable_extensions; do
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ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
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{ test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue
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# Check for GNU ac_path_EGREP and select it if it is found.
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# Check for GNU $ac_path_EGREP
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case `"$ac_path_EGREP" --version 2>&1` in
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*GNU*)
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ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
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*)
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ac_count=0
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$as_echo_n 0123456789 >"conftest.in"
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while :
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do
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cat "conftest.in" "conftest.in" >"conftest.tmp"
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mv "conftest.tmp" "conftest.in"
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cp "conftest.in" "conftest.nl"
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$as_echo 'EGREP' >> "conftest.nl"
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"$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
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diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
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as_fn_arith $ac_count + 1 && ac_count=$as_val
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if test $ac_count -gt ${ac_path_EGREP_max-0}; then
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# Best one so far, save it but keep looking for a better one
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ac_cv_path_EGREP="$ac_path_EGREP"
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ac_path_EGREP_max=$ac_count
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fi
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# 10*(2^10) chars as input seems more than enough
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test $ac_count -gt 10 && break
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done
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rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
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esac
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$ac_path_EGREP_found && break 3
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done
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done
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done
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IFS=$as_save_IFS
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if test -z "$ac_cv_path_EGREP"; then
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as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
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fi
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else
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ac_cv_path_EGREP=$EGREP
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fi
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
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$as_echo "$ac_cv_path_EGREP" >&6; }
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EGREP="$ac_cv_path_EGREP"
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking installed Linux kernel header files" >&5
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$as_echo_n "checking installed Linux kernel header files... " >&6; }
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if ${libc_cv_linux2632+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <linux/version.h>
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#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < (2 *65536+ 6 *256+ 32) /* 2.6.32 */
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eat flaming death
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#endif
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "eat flaming death" >/dev/null 2>&1; then :
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libc_cv_linux2632='TOO OLD!'
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else
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libc_cv_linux2632='2.6.32 or later'
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_linux2632" >&5
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$as_echo "$libc_cv_linux2632" >&6; }
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if test "$libc_cv_linux2632" != '2.6.32 or later'; then
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as_fn_error $? "GNU libc requires kernel header files from
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Linux 2.6.32 or later to be installed before configuring.
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The kernel header files are found usually in /usr/include/asm and
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/usr/include/linux; make sure these directories use files from
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Linux 2.6.32 or later. This check uses <linux/version.h>, so
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make sure that file was built correctly when installing the kernel header
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files. To use kernel headers not from /usr/include/linux, use the
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configure option --with-headers." "$LINENO" 5
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fi
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# If the user gave a minimal version number test whether the available
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# kernel headers are young enough. Additionally we have minimal
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# kernel versions for some architectures. If a previous configure fragment
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# set arch_minimum_kernel already, let that override our defaults here.
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# Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
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# if appropriate too.
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test -n "$arch_minimum_kernel" ||
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case "$machine" in
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i386*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.6.32
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;;
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x86_64/x32)
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arch_minimum_kernel=3.4.0
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;;
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powerpc/powerpc32*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.6.32
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;;
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s390/s390-32)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.6.32
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;;
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s390/s390-64)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.6.32
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;;
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sh*)
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arch_minimum_kernel=2.6.32
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libc_cv_gcc_unwind_find_fde=yes
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;;
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sparc/sparc64*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.6.32
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;;
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sparc*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.6.32
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;;
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*)
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arch_minimum_kernel=2.6.32
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;;
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esac
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if test -n "$minimum_kernel"; then
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user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
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arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
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if test $user_version -lt $arch_version; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&5
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$as_echo "$as_me: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&2;}
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minimum_kernel=$arch_minimum_kernel
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fi
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else
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minimum_kernel=$arch_minimum_kernel
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for kernel header at least $minimum_kernel" >&5
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$as_echo_n "checking for kernel header at least $minimum_kernel... " >&6; }
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decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
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abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <linux/version.h>
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#if LINUX_VERSION_CODE < $decnum
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eat flaming death
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#endif
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "eat flaming death" >/dev/null 2>&1; then :
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libc_minimum_kernel='too old!'
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else
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libc_minimum_kernel=ok
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fi
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rm -f conftest*
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_minimum_kernel" >&5
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$as_echo "$libc_minimum_kernel" >&6; }
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if test "$libc_minimum_kernel" = ok; then
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cat >>confdefs.h <<_ACEOF
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#define __LINUX_KERNEL_VERSION $decnum
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_ACEOF
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cat >>confdefs.h <<_ACEOF
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#define __ABI_TAG_VERSION $abinum
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_ACEOF
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else
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as_fn_error $? "*** The available kernel headers are older than the requested
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*** compatible kernel version" "$LINENO" 5
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fi
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# Until we start requiring 2.6.37+ headers, we need to check for the
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# availability of linux/fanotify.h for testing purposes.
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ac_fn_c_check_header_compile "$LINENO" "linux/fanotify.h" "ac_cv_header_linux_fanotify_h" "/* No default includes. */
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"
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if test "x$ac_cv_header_linux_fanotify_h" = xyes; then :
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$as_echo "#define HAVE_LINUX_FANOTIFY_H 1" >>confdefs.h
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fi
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# The result of the above test for the use of the FDE code is invalid if
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# the user overrides the decision about the minimum ABI.
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if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
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libc_cv_gcc_unwind_find_fde=no
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fi
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if test -n "$sysheaders"; then
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CPPFLAGS=$OLD_CPPFLAGS
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fi
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# Under Linux the NPTL add-on should be available.
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case $add_ons in
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# It is available. Good.
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*nptl*)
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nptl_missing=
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;;
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*)
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nptl_missing=yes
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;;
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esac
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if test "$nptl_missing"; then
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if test $enable_sanity = yes; then
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echo "\
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*** On GNU/Linux systems it is normal to compile GNU libc with the
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*** \`nptl' add-on. Without that, the library will be
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*** incompatible with normal GNU/Linux systems.
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*** If you really mean to not use this add-on, run configure again
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*** using the extra parameter \`--disable-sanity-checks'."
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exit 1
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else
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echo "\
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*** WARNING: Are you sure you do not want to use the \`nptl'
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*** add-on?"
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fi
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fi
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if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
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if test $enable_sanity = yes; then
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echo "\
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*** On GNU/Linux systems the GNU C Library should not be installed into
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*** /usr/local since this might make your system totally unusable.
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*** We strongly advise to use a different prefix. For details read the FAQ.
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*** If you really mean to do this, run configure again using the extra
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*** parameter \`--disable-sanity-checks'."
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exit 1
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else
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echo "\
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*** WARNING: Do you really want to install the GNU C Library into /usr/local?
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*** This might make your system totally unusable, for details read the FAQ."
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fi
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fi
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# One Linux we use ldconfig.
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use_ldconfig=yes
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# We need some extensions to the `ldd' script.
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case "$machine" in
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i[3456]86*)
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ldd_rewrite_script=sysdeps/unix/sysv/linux/ldd-rewrite.sed
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;;
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s390*)
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ldd_rewrite_script=sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
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;;
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sparc*)
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ldd_rewrite_script=sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
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;;
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x86_64*)
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ldd_rewrite_script=sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
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;;
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powerpc*)
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ldd_rewrite_script=sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
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;;
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*)
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;;
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esac
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if test $host = $build; then
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# If $prefix/include/{net,scsi} are symlinks, make install will
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# clobber what they're linked to (probably a kernel tree).
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# test -L ought to work on all Linux boxes.
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if test "x$prefix" != xNONE; then
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ac_prefix=$prefix
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else
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|
ac_prefix=$ac_default_prefix
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for symlinks in ${ac_prefix}/include" >&5
|
|
$as_echo_n "checking for symlinks in ${ac_prefix}/include... " >&6; }
|
|
ac_message=
|
|
if test -L ${ac_prefix}/include/net; then
|
|
ac_message="$ac_message
|
|
${ac_prefix}/include/net is a symlink"
|
|
fi
|
|
if test -L ${ac_prefix}/include/scsi; then
|
|
ac_message="$ac_message
|
|
${ac_prefix}/include/scsi is a symlink"
|
|
fi
|
|
if test -n "$ac_message"; then
|
|
as_fn_error $? "$ac_message
|
|
\`make install' will destroy the target of the link(s).
|
|
Delete the links and re-run configure, or better still, move the entire
|
|
${ac_prefix}/include directory out of the way." "$LINENO" 5
|
|
else
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
|
|
$as_echo "ok" >&6; }
|
|
fi
|
|
fi
|
|
|
|
# We have inlined syscalls.
|
|
$as_echo "#define HAVE_INLINED_SYSCALLS 1" >>confdefs.h
|
|
|