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Enhance setting the minimum kernel version glibc will run against.

Browse Source 
Ideally, eglibc should also benefit for that, but the current code does not set it.

 /trunk/scripts/build/libc/glibc.sh        |   38    33     5     0 +++++++++++++++---
 /trunk/config/libc/glibc.in               |    4     2     2     0 +-
 /trunk/config/libc/uClibc.in              |    2     2     0     0 +
 /trunk/config/libc/eglibc.in              |    4     2     2     0 +-
 /trunk/config/libc/glibc-eglibc-common.in |   80    68    12     0 +++++++++++++++++++++++++++++++------
 /trunk/config/libc.in                     |   69    38    31     0 ++++++++++++++++++--------------
 6 files changed, 145 insertions(+), 52 deletions(-)
This commit is contained in:
Yann E. MORIN" 2008-09-14 18:09:36 +00:00
parent 91a8de54e4
commit 02d2b29cda
7 changed files with 145 additions and 53 deletions
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69
config/libc.in
View File

@ -11,6 +11,20 @@ if ! BARE_METAL
menu "C-library"
config LIBC_VERSION
string
help
Enter the date of the snapshot you want to use in the form: YYYYMMDD
where YYYY is the 4-digit year, MM the 2-digit month and DD the 2-digit
day in the month.
Please note:
- glibc has snapshots done every monday, and only the last ten are kept.
- uClibc has daily snapshots, and only the last 30-or-so are kept.
So if you want to be able to re-build your toolchain later, you will
have to save your C library tarball by yourself.
choice
bool
prompt "C-library to use:"
@ -22,10 +36,6 @@ config LIBC_GLIBC
select LIBC_SUPPORT_NPTL
select LIBC_SUPPORT_LINUXTHREADS
if LIBC_GLIBC
source config/libc/glibc.in
endif
config LIBC_EGLIBC
bool
prompt "eglibc (EXPERIMENTAL)"
@ -40,23 +50,14 @@ config LIBC_EGLIBC
cross-compilation support. EGLIBC also includes some embedded ports
(such as e500/spe) that are normally separate add-ons of GLIBC.
if LIBC_EGLIBC
source config/libc/eglibc.in
endif
config LIBC_UCLIBC
bool
prompt "uClibc"
select LIBC_SUPPORT_LINUXTHREADS
if LIBC_UCLIBC
source config/libc/uClibc.in
endif
endchoice
config LIBC_VERSION
string
comment "Common C library options"
config LIBC_SUPPORT_NPTL
bool
@ -66,6 +67,12 @@ config LIBC_SUPPORT_LINUXTHREADS
bool
default n
config THREADS
string
default "nptl" if THREADS_NPTL
default "linuxthreads" if THREADS_LINUXTHREADS
default "none" if THREADS_NONE
choice
bool
prompt "Threading implementation to use:"
@ -89,24 +96,24 @@ config THREADS_NONE
endchoice
config THREADS
string
default "nptl" if THREADS_NPTL
default "linuxthreads" if THREADS_LINUXTHREADS
default "none" if THREADS_NONE
if LIBC_GLIBC
source config/libc/glibc.in
endif
config LIBC_VERSION
help
Enter the date of the snapshot you want to use in the form: YYYYMMDD
where YYYY is the 4-digit year, MM the 2-digit month and DD the 2-digit
day in the month.
Please note:
- glibc has snapshots done every monday, and only the last ten are kept.
- uClibc has daily snapshots, and only the last 30-or-so are kept.
So if you want to be able to re-build your toolchain later, you will
have to save your C library tarball by yourself.
if LIBC_EGLIBC
source config/libc/eglibc.in
endif
# Hack: mconf does not allow to include a file multiple times,
# so include glibc and eglibc common options from here, rather
# than from each config files.
if LIBC_GLIBC || LIBC_EGLIBC
source config/libc/glibc-eglibc-common.in
endif
if LIBC_UCLIBC
source config/libc/uClibc.in
endif
endmenu

1
config/libc/eglibc-glibc-common.in
View File

@ -1 +0,0 @@
glibc-eglibc-common.in

4
config/libc/eglibc.in
View File

@ -1,5 +1,7 @@
# eglibc options
comment "eglibc specific options"
choice
bool
prompt "eglibc version"
@ -68,5 +70,3 @@ config EGLIBC_CHECKOUT
Note that crosstool-NG will *not* update your working copy, you will
have to do that yourself.
source config/libc/eglibc-glibc-common.in

80
config/libc/glibc-eglibc-common.in
View File

@ -7,6 +7,8 @@
# If mconf is updated to accept multiple inclusion of the same
# file, then the symlink can go (and the includers be updated).
comment "glibc/eglibc common options"
config LIBC_GLIBC_EXTRA_CONFIG
string
prompt "extra config"
@ -68,30 +70,57 @@ config LIBC_ADDONS_LIST
Eg.: crypt (for very old libces)
config LIBC_GLIBC_USE_HEADERS_MIN_KERNEL
if KERNEL_LINUX
choice
bool
prompt "Use headers version for minimum kernel version supported"
default y
prompt "Minimum supported kernel version"
default LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
config LIBC_GLIBC_KERNEL_VERSION_NONE
bool
prompt "Let ./configure decide"
help
Let ./configure decide what minimum kernel version glibc/eglibc
will be able to run against.
This will inclde legacy compatibility code for older kernels in
the C library, thus ensuring that it will run on a large number
of old kernels.
The minimum kernel version supported will be dependent upon the
target you build for. For example:
alpha*-*-linux-gnu Requires Linux 2.6.9 for NPTL
sh[34]-*-linux-gnu Requires Linux 2.6.11
powerpc* Requires Linux 2.4.19
arm*-*-linux-*gnueabi Requires Linux 2.6.16
config LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
bool
prompt "Same as kernel headers (default)"
help
Normaly, you'll want glibc/eglibc to run against the same kernel
version as the one used for the headers.
This is the default.
If enabled, crosstool-ng will use the chosen version of kernel
headers for the glibc minimum kernel version supported, which is
what gets passed to "--enable-kernel=" when configuring glibc.
Enabling this will ensure that no legacy compatibility code for
older kernels is built into your C libraries, but it will
be unable to run on kernel versions older than whichever kernel
headers version you've built the toolchain for.
If you know for sure that your toolchain will never need to build
applications that will run under a kernel version older than your
chosen kernel headers version (CT_KERNEL_VERSION), you can choose
"y" here.
config LIBC_GLIBC_MIN_KERNEL_CHOSEN
string
prompt "Minimum kernel version supported"
default "2.6.9"
depends on ! LIBC_GLIBC_USE_HEADERS_MIN_KERNEL
config LIBC_GLIBC_KERNEL_VERSION_CHOSEN
bool
prompt "Specific kernel version"
help
Specify the earliest Linux kernel version you want glibc to
include support for. This does not have to match the kernel
@ -107,7 +136,34 @@ config LIBC_GLIBC_MIN_KERNEL_CHOSEN
Most people can leave this at the default value of "2.6.9".
if LIBC_GLIBC_KERNEL_VERSION_CHOSEN
config LIBC_GLIBC_MIN_KERNEL_VERSION
string
prompt "Minimum kernel version to support"
default "2.6.9"
help
Enter here the lowest kernel version glibc/eglibc will be able to
run against.
The minimum kernel version supported will be dependent upon the
target you build for. For example:
alpha*-*-linux-gnu Requires Linux 2.6.9 for NPTL
sh[34]-*-linux-gnu Requires Linux 2.6.11
powerpc* Requires Linux 2.4.19
arm*-*-linux-*gnueabi Requires Linux 2.6.16
Note that no sanity check is performed by crosstool-NG to ensure
that the value you enter here is appropriate for your target.
endif # LIBC_GLIBC_KERNEL_VERSION_CHOSEN
endchoice
config LIBC_GLIBC_MIN_KERNEL
string
default KERNEL_VERSION if LIBC_GLIBC_USE_HEADERS_MIN_KERNEL
default LIBC_GLIBC_MIN_KERNEL_CHOSEN if ! LIBC_GLIBC_USE_HEADERS_MIN_KERNEL
default "" if LIBC_GLIBC_KERNEL_VERSION_NONE
default KERNEL_VERSION if LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS
default LIBC_GLIBC_MIN_KERNEL_VERSION if LIBC_GLIBC_USE_HEADERS_MIN_KERNEL
endif # KERNEL_LINUX

4
config/libc/glibc.in
View File

@ -1,5 +1,7 @@
# glibc options
comment "glibc specific options"
choice
bool
prompt "glibc version"
@ -72,5 +74,3 @@ config LIBC_GLIBC_CONFIGPARMS
Note: this is awkward, doesn't work well if you need more than one
line in configparms
source config/libc/glibc-eglibc-common.in

2
config/libc/uClibc.in
View File

@ -1,5 +1,7 @@
# uClibc options
comment "uClibc specific options"
choice
bool
prompt "uClibc version"

38
scripts/build/libc/glibc.sh
View File

@ -89,9 +89,21 @@ do_libc_headers() {
addons_config="${addons_config//linuxthreads/}"
addons_config=$(echo "${addons_config}" |sed -r -e 's/^,+//; s/,+$//; s/,+/,/g;')
extra_config="${addons_config}"
min_kernel_config=
case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in
*enable-kernel*) ;;
*) if [ "${CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS}" = "y" \
-o "${CT_LIBC_GLIBC_USE_HEADERS_MIN_KERNEL}" = "y" ]; then
min_kernel_config="--enable-kernel=$(echo ${CT_LIBC_GLIBC_MIN_KERNEL} |sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;')"
fi
;;
esac
extra_config="${extra_config} ${min_kernel_config}"
cross_cc=$(CT_Which "${CT_TARGET}-gcc")
CT_DoLog DEBUG "Using gcc for target: '${cross_cc}'"
CT_DoLog DEBUG "Extra config passed : '${addons_config}'"
CT_DoLog DEBUG "Extra config passed : '${extra_config}'"
libc_cv_ppc_machine=yes \
CC=${cross_cc} \
@ -104,7 +116,7 @@ do_libc_headers() {
--without-cvs \
--disable-sanity-checks \
--enable-hacker-mode \
${addons_config} \
${extra_config} \
--without-nptl
CT_DoLog EXTRA "Installing C library headers"
@ -208,11 +220,17 @@ do_libc_start_files() {
CT_DoLog EXTRA "Configuring C library"
# Add some default glibc config options if not given by user.
extra_config=""
extra_config=
min_kernel_config=
case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in
*enable-kernel*) ;;
*) extra_config="${extra_config} --enable-kernel=$(echo ${CT_LIBC_GLIBC_MIN_KERNEL} |sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;')"
*) if [ "${CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS}" = "y" \
-o "${CT_LIBC_GLIBC_USE_HEADERS_MIN_KERNEL}" = "y" ]; then
min_kernel_config="--enable-kernel=$(echo ${CT_LIBC_GLIBC_MIN_KERNEL} |sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;')"
fi
;;
esac
extra_config="${extra_config} ${min_kernel_config}"
case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in
*-tls*) ;;
*) extra_config="${extra_config} --with-tls"
@ -314,7 +332,17 @@ do_libc() {
# We don't need to be conditional on wether the user did set different
# values, as they CT_LIBC_GLIBC_EXTRA_CONFIG is passed after extra_config
extra_config="--enable-kernel=$(echo ${CT_LIBC_GLIBC_MIN_KERNEL} |sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;')"
extra_config=
min_kernel_config=""
case "${CT_LIBC_GLIBC_EXTRA_CONFIG}" in
*enable-kernel*) ;;
*) if [ "${CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS}" = "y" \
-o "${CT_LIBC_GLIBC_USE_HEADERS_MIN_KERNEL}" = "y" ]; then
min_kernel_config="--enable-kernel=$(echo ${CT_LIBC_GLIBC_MIN_KERNEL} |sed -r -e 's/^([^.]+\.[^.]+\.[^.]+)(|\.[^.]+)$/\1/;')"
fi
;;
esac
extra_config="${extra_config} ${min_kernel_config}"
case "${CT_THREADS}" in
nptl) extra_config="${extra_config} --with-__thread --with-tls";;