This commit refactors how Stack Smashing Protection support is handled
in Buildroot:
*) It turns the BR2_TOOLCHAIN_BUILDROOT_USE_SSP option into an option
that only enables the SSP support in uClibc, when using the internal
toolchain backend.
*) It adds an hidden BR2_TOOLCHAIN_HAS_SSP option that gets enabled
when the toolchain has SSP support. Here we have the usual dance:
glibc/eglibc in internal/external backend always select this
option, in the case of uClibc/internal, it gets selected when
BR2_TOOLCHAIN_BUILDROOT_USE_SSP is enabled, in the case of
uClibc/external, there is a new configuration option that the user
must select (or not) depending on whether the toolchain has SSP
support.
*) It adds a new options BR2_ENABLE_SSP in the "Build options" menu,
to enable the usage of SSP support, by adding
-fstack-protector-all to the CFLAGS.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The TARGET_{CC,CXX,LD,...} variables no longer contain any --sysroot
option, since we're now using a toolchain wrapper for external
toolchains.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
When building for nommu flat targets the CFLAGS/CXXFLAGS/LDFLAGS must be
adjusted accordingly.
For gcc this means passing along -Wl,-elf2flt to signal the linker.
For ld this means -elf2flt.
Also correct the error in STACKSIZE settings from commit 9edf482d which
is setting gcc flags as ld flags and will surely fail (no package uses
it at the moment so it was never seen).
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The current code to set ABI on ARM does the following:
ifeq ($(BR2_arm)$(BR2_armeb),y)
... set ABI without 'hf' suffix ...
else ifeq ($(BR2_ARM_EABIHF),y)
... set ABI with 'hf' suffix ...
endif
But since $(BR2_arm)$(BR2_armeb) will always be 'y' in the cases where
BR2_ARM_EABIHF is 'y', it means that the 'else' part of the condition
will never be used.
Fix this by appending 'hf' to the ABI variable when BR2_ARM_EABIHF is
selected.
[Peter: put EABIhf handling under arm/armeb conditional for consistency]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Blackfin for FDPIC targets uses *-linux-*, however for FLAT targets it
needs *-uclinux-* in order for gcc to build properly.
[Thomas: use a TARGET_OS variable instead of redefining
GNU_TARGET_NAME completely]
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The current SSP handling is incomplete.
First we need to build uClibc with SSP support for a complete
"experience".
Second, it doesn't hurt to add -fstack-protector-all to the
CFLAGS/CXXFLAGS since most users would expect buildroot to do this
rather than adding the flags themselves.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit introduces the support for the EABIhf ABI, next to the
existing support we have for EABI and OABI (even though OABI support
is deprecated). EABIhf allows to improve performance of floating point
workload by using floating point registers to transfer floating point
arguments when calling functions, instead of using integer registers
to do, as is done in the 'softfp' floating point model of EABI.
In addition to this, this commit introduces a list of options for the
floating point support:
* Software floating point
* VFP
* VFPv3
* VFPv3-D16
* VFPv4
* VFPv4-D16
and it introduces some logic to make sure the options are only visible
when it makes sense, depending on the ARM core being selected. This is
however made complicated by the fact that certain VFP capabilities are
mandatory on some cores, but optional on some other cores. The kconfig
logic tries to achieve the following goals:
* Hide options that are definitely not possible.
* Use safe default values (i.e for Cortex-A5 and A7, the presence of
the VFPv4 unit is optional, so we default on software floating
point on these cores)..
* Show the available possibilities, even if some of them are not
necessarily working on a particular core (again, for the Cortex-A5
and A7 cores, there is no way of knowing whether the particular
variant used by the user has VFPv4 or not, so we select software
floating point by default, but still show VFP/VFPv3/VFPv4 options).
It is worth noting that this commit doesn't add support for all
possible -mfpu= values on ARM. We haven't added support for fpa, fpe2,
fpe3, maverick (those four are only used on very old ARM cores), for
vfpv3-fp16, vfpv3-d16-fp16, vfpv3xd, vfpv3xd-fp16, neon-fp16,
vfpv4-sp-d16. They can be added quite easily if needed thanks to the
new organization of the Config.in options.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Currently, when we need to do a conditional on the type of C library
used, we need to take into account the three toolchain backends. As we
are going to add eglibc support to the Buildroot toolchain backend, it
would become even uglier, so this patch introduces two new hidden
options: BR2_TOOLCHAIN_USES_UCLIBC and BR2_TOOLCHAIN_USES_GLIBC, that
exist regardless of the toolchain backend. The entire Buildroot code
base is converted to use those options.
Note that we have intentionally created only one option
(BR2_TOOLCHAIN_USES_GLIBC) for both glibc and eglibc, since they are
essentially the same, as far as Buildroot is concerned.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The current code spawns as many jobs as up to twice the number of CPUs.
On small-class machines like laptops, with a limitted amount of memory,
but still a few CPUs (real or hyperthreads), the HDD becomes a bottleneck,
and it becomes almost impossible to do anythiong else while there is a
build in progress.
Limit the number of jobs to the number of CPUs plus one.
Even on fast machines with fast HDDs, this settings keeps the machine
fully busy (for those packages that can build in parallel, of course).
For example, building qemu or the linux kernel kept my hyperthreaded
hexa Core i7 with 18GiB of RAM, busy at 99% (I never ever managed to
get 100% even with more jobs, not even 200); while on my hyperthreaded
dual Core i5 with only 4GiB and a slow HDD, I still topped at 100% CPU,
while still able to do some work involving the HDD.
If the number of processors is not available, assume one.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Nathan Lynch <ntl@pobox.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Add new option <PKG>_FLAT_STACKSIZE. The document needs to be updated.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Just introduce the symbol and options in arch generic Config.in.
Add FLAT types specific compiling flags into package makefile.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The external toolchain wrapper sets sysroot etc. to an absolute path.
By changing this to a relative path, it is possible to move the host
directory to a different location and still have a working build
system.
This only works for a downloaded external toolchain. For a pre-installed
external toolchain, it is possible to move the host directory to a
different location, but not the external toolchain directory (it does work
if the external toolchain directory lies within the host directory). For
an internal or crosstool-ng toolchain, there is no wrapper so updating the
sysroot path should be done in a different way.
See http://lists.busybox.net/pipermail/buildroot/2012-February/050371.html
for information about others things to do to make the host directory
relocatable.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Acked-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The following changes LDFLAGS from -static to --static if building
with BR2_PREFER_STATIC_LIB so that various components actually build
statically.
Libtool interpret -static as linking statically with libraries that will not
be installed to the libdir; you have to pass it -all-static to force static
linking. Or, pass --static, which libtool passes on blindly to gcc. gcc
and (GNU) ld both interpret --static the same as -static (although this
isn't documented).
Signed-off-by: Andy Kennedy <andy.kennedy@adtran.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Many configure scripts support an option like --disable-doc, --disable-docs
or --disable-documentation. Pass all of these to configure.
In addition, not all Xorg packages accept the --disable-xxx. Instead they
look for xmlto and/or fop and build documentation if they exist. For host
packages, this may lead to build errors because /usr/bin/xmlto uses libxml2
and we set LD_LIBRARY_PATH to point to $(HOST_DIR)/lib, which may contain
a libxml2 as well. So it's essential to disable xmlto for host packages.
Also some whitespace cleanup.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The longcalls option allows calls across a greater range of addresses.
This option may degrade both code size and performance, but
the linker can generally optimize away the unnecessary overhead
when a call ends up within range
Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Strip libthread_db the same as any other library, but strip libpthread
with --strip-debug. See the relevant mailing list discussion [1] for
additional details.
[1] http://lists.busybox.net/pipermail/buildroot/2012-October/060126.html
Signed-off-by: Richard Braun <rbraun@sceen.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Give the path to the realdelf binary for the target, similar to how we
do for the other tools.
[Peter: reworded]
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
When compiling for the same architecture and libc as the host,
GNU_TARGET_NAME and GNU_HOST_NAME are equal. configure scripts use
these to detect cross-compilation, and will decide that we're doing
native compilation. This may trigger running of executables,
which fail because of missing libraries in the host environment.
To solve this, set the vendor part in GNU_TARGET_NAME to buildroot.
This problem exists for instance in xserver_xorg-server on x86_64.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
With the replacement of GENTARGETS by package-generic, there is a risk
that local packages don't work anymore without any indication of what
is wrong. Therefore, generate an error message if the GENTARGETS,
AUTOTARGETS or CMAKETARGETS macro is still used.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
-mno-abicalls is an old kludge for some (probably) old issue.
Remove it since it's actually harmful, static busybox doesn't build with
it for a modern-ish toolchain (defaults as of this commit, uClibc
0.9.33.2 + gcc 4.5.4).
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Practically speaking, MIPS has three useful ABIs:
* o32 is for 32-bits CPUs, or 64-bit CPUs running only a 32-bit subset
of the instruction set.
* n32 is for 64-bits CPUs only. It has 32-bits pointers and long
integers.
* n64 is for 64-bits CPUs only. It has 64-bits pointers and long
integers.
See http://www.linux-mips.org/wiki/MIPS_ABI_History and
http://www.linux-mips.org/wiki/WhatsWrongWithO32N32N64 for more
details.
So, this commit reworks the Buildroot MIPS support by:
* Add separate mips64/mips64el top-level architectures.
* Renaming the n32 ABI option to BR2_MIPS_NABI32, for consistency
with BR2_MIPS_OABI32.
* Renaming the n64 ABI option to BR2_MIPS_NABI64, for consistency
with BR2_MIPS_OABI32.
* Make the n32 and n64 ABI selections select the BR2_ARCH_IS_64,
since those ABIs are valid on 64-bits CPUs only.
* Removing the o64 ABI, which is practicaly never used.
* Removing the "none" ABI, which really doesn't make sense.
* Introduce the mips64 and mips64el architecture names when a 64-bits
MIPS ABI is choosen. This will fix build issue like
http://autobuild.buildroot.org/results/9b8c5ea86c953a89e85e7b67e9221de41773f652/build-end.log
where gmp was confused by the fact of having a 32 bits architecture
(detected by the mips- architecture part of the tuple) but 64 bits
integer size when compiling.
* Adjust the uclibc.mk logic to support the new mips64/mips64el
architecture names, and take into account the renaming of the ABI
options.
This has been build tested by generating Buildroot toolchains and
compiling a few packages for MIPS o32, MIPS n32 and MIPS n64.
This work is originally based on prior work done by Gustavo Zacarias.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
The -fPIC breaks the purgatory of kexec (= the code that passes command-line
arguments to the kernel): kexec doesn't know how to handle the GOT and PLT
relocation entries.
There is also no reason at all to pass -fPIC. Shared libraries that require
it will add it to their local Makefiles, and normal executables have no
business with -fPIC (plus it adds overhead...).
The -fPIC was added by Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
in commit 8027784c. That commit adds sysroot parameters to CFLAGS.
There is no explanation why -fPIC is also added for x86_64.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
When BR2_JLEVEL is 0, set PARALLEL_JOBS to double the number of CPUs
detected. This allows one to more or less fully utilize the host
system without manually tuning the configuration.
Also make 0 the default value for BR2_JLEVEL.
Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
BR2_JLEVEL currently is expanded directly in $(MAKE), and used in
invocations of other build software (e.g. ct-ng). However, we are
going to allow "0" to be a meaningful value for BR2_JLEVEL, which
won't work for these uses. Given that it is not permissible to modify
BR2_-prefixed variables in Makefiles, we need an intermediate
variable.
Define PARALLEL_JOBS to $(BR2_JLEVEL), and use the former in MAKE's
definition. Uses of BR2_JLEVEL throughout the rest of the tree to be
adjusted similarly in follow-up patches.
Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Instead of providing two variables, make GNU_TARGET_NAME give the real
target name, and remove REAL_GNU_TARGET_NAME altogether.
Signed-off-by: Richard Braun <rbraun@sceen.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Re-integrate in gcc-uclibc-4.x.mk things from
toolchain/gcc/Makefile.in that were completely gcc-specific. There was
no reason to pull that when building with other backends than the
internal one.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Some packages don't automatically enable IPv6 support if not configured
with --disable-ipv6, or use AC_TRY_RUN which doesn't work when cross
compiling (like curl), so explicitly configure with --enable-ipv6.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
A host package that uses AUTORECONF (such as host-libglib2)
may end up running './config.status --recheck'. This will
call the configure script with the environment variables
set in HOST_MAKE_ENV. If PKG_CONFIG_SYSROOT_DIR is missing
this will cause the hardcoded sysroot dir take effect leading
to wrong paths.
See commit 22acade2ec which works around this problem by
fiddling with the generated .pc file. This commit becomes
obsolete with this fix.
Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
Cc: Daniel Mack <zonque@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Add the ability for buildroot to build an SPE ABI enabled toolchain.
This is mandatory for e500v1/v2 cores since they don't support classic
FPU mode as the e500mc does.
Useful for Freescale's PowerQUICC III and single/dual-core QorIQ
line of processors.
The new TARGET_ABI variable is used rather than TARGET_CFLAGS for
uclibc's UCLIBC_EXTRA_CFLAGS to avoid breakish CFLAGS leaking in, a
good example being -mthumb for ARM.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Allow the user to specify additional options for the target LDFLAGS.
I use this to pass the -te500v2 option to the linker, when using the
CodeSourcery toolchain for PowerPC. This chooses the correct CRT for e500 hard
float. Otherwise I get errors like
undefined reference to `_save32gpr_31'
undefined reference to `_rest32gpr_31_x'
at final link time.
[Peter: fixup, use qstrip]
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
For target packages, depending on BR2_PREFER_STATIC_LIB, add the
correct combination of --{enable,disable}-{shared,static} flags to
./configure calls.
* When BR2_PREFER_STATIC_LIB is enabled, we pass --enable-static
--disable-shared.
* When BR2_PREFER_STATIC_LIB is disabled, we pass --enable-static
--enable-shared. We enable static libraries since they can still be
useful to statically link applications against some libraries
(sometimes it is useful for size reasons). Static libraries are
anyway only installed in the STAGING_DIR, so it doesn't increase in
any way the size of the TARGET_DIR.
For host packages, always pass --enable-shared and --disable-static.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Now that we use a wrapper for external toolchains (and internal ones
default to the correct setting), we no longer need to explicitly pass
sysroot/march/mtune/mabi/floating point mode in TARGET_CFLAGS.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Add a simple toolchain wrapper for external toolchains, which forces the
correct sysroot/march/mtune/floating point options needed to use it
with buildroot.
With this in place the external toolchain behaves similar to the internal
ones, and the special handling can be removed. This also means that the
toolchain is usable outside buildroot without having to pass any special
compiler flags.
Also adjust the downloadable external toolchain support to install under
HOST_DIR so it can be used after the temporary build files are removed.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Commit 7e3e8ec040 (CFLAGS/LDFLAGS: don't add -I / -L args for STAGING_DIR)
exposed a lingering libtool problem.
Unless instructed otherwise (using -L) libtool will search its built in
system path for libraries, and use those instead if found. The default
search path is '/usr/lib, /lib, /usr/local/lib', which is no good for
cross compilation.
Fix it by setting the system search path to the empty string, effectively
disabling this feature.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Now that we use sysroot for all toolchains, the explicit -I / -L arguments
in CFLAGS / LDFLAGS aren't needed anymore (And having them makes the build
quite noisy for certain packages as STAGING_DIR/include normally doesn't
exist).
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Only prefix the external toolchain calls with its absolute path if
BR2_TOOLCHAIN_EXTERNAL_PATH is set, otherwise just assume it will
be available in the path.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
A few packages (like xlib_xtrans) install their .pc files here, and
upstream pkg-config defaults to searching both /usr/lib/pkgconfig and
/usr/share/pkgconfig, so add it as well.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Similar to the --with-pc-path option. It works just like the existing
PKG_CONFIG_SYSROOT_DIR environment variable, but compiled in.
The environment variable overrides this default setting if set.
This way we don't need to pass PKG_CONFIG_SYSROOT_DIR in the environment
when building for the target, and it is easier to reuse pkg-config outside
BR (E.G. for the SDK) without having to setup special environment
variables.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
