Signed-off-by: Stefan Nickl <Stefan.Nickl@gmail.com>
Acked-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
From the build configuration, Buildroot defines and set some compiler
and linker flags that should be passed to any packages build-system.
For package using the cmake-package infrastructure, this is achieved
via the toolchainfile.cmake.
This change simplifies the way the toolchainfile.cmake file handles
these flags: it now just sets them, without any attempt to extend them
with those Buildroot defined.
This change still allows overriding these flags from the configure
command line.
So, now, when a CMake-based package needs to extend them, they should
be fully set from the package *.mk file. This behavior is consistent
with what is done for others package infrastructures.
This change should not pull any regression WRT the bug #7280 [1].
However, now, when someone uses the toolchainfile.cmake file outside of
Buildroot, he/she must overload all compiler/linker flags (including the
ones Buildroot sets since they no longer get automatically added).
[1] https://bugs.busybox.net/show_bug.cgi?id=7280
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
When a build type is set, CMake does append some flags that can override
those set by Buildroot due to the gcc option parser (in which the last
argument controling an option wins).
Hereafter is a summary of the optimization and debug flags set by
Buildroot and appended by CMake.
* Flags set by Buildroot depending on the configuration:
BR2_ENABLE_DEBUG | Optim. level | Buildroot {C,CXX}FLAGS
=================+=====================+=======================
y | BR2_OPTIMIZE_S | -Os -gx
y | BR2_OPTIMIZE_G | -Og -gx
y | BR2_OPTIMIZE_{0..3} | -On -gx
n | BR2_OPTIMIZE_S | -Os
n | BR2_OPTIMIZE_G | -Og
n | BR2_OPTIMIZE_{0..3} | -On
* Default flags appended by CMake depending on the build type:
Build type | Flags | Effects on {C,CXX}FLAGS
===============+=================+===========================================
Debug | -g | Force -g, compatible with BR2_ENABLE_DEBUG
MinSizeRel | -Os -DNDEBUG | Set -Os, compatible with BR2_OPTIMIZE_S
Release | -O3 -DNDEBUG | Set -O3, closest to the others cases,
| | though the optimization level is forced.
RelWithDebInfo | -O2 -g -DNDEBUG | Force -g and set -O2, not friendly with BR
To avoid the CMake flags take precedence over the Buildroot ones, this
change sets in toolchainfile.cmake the per-config compiler flags CMake
can append depending on the build type Buildroot defined.
So, CMake does not mess up with the compilation flags Buildroot sets.
It is still possible to override these per-config flags on the cmake
command line.
Note:
If a CMake-based project forces the compiler and/or linker flag
definitions (the default ones or the per-config ones - e.g.
CMAKE_C_FLAGS/CMAKE_C_FLAGS_{DEBUG,RELEASE}), there is not much
Buildroot can do about it.
So, the flags will be overwritten anyway in these cases.
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Thomas:
- adjust comment in toolchainfile.cmake.in, as suggested by Arnout.
- also handle CMAKE_Fortran_FLAGS_*, as suggested by Arnout.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
The chosen CMAKE_BUILD_TYPE encodes an option of the Buildroot
configuration, so it makes more sense to save it in the
toolchainfile.cmake than to pass it during configure.
It is still possible to override the build type on the cmake
command line.
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Thomas: reword description in the CHANGES file.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Currently, it is not possible for a br2-external tree to override a
defconfig bundled in Buildroot, nor is it possible to override one from
a previous br2-external tree in the stack.
However, it is interesting that a latter br2-external tree be able to
override a defconfig:
- the ones bundled in Buildroot are minimalist, and almost always
build a toolchain, so a br2-external tree may want to provide a
"better" defconfig (better, in the sense "suited for the project");
- similarly for a defconfig from a previous br2-external tree.
But we can't do that, as the rules for the defconfigs are generated in
the order the br2-external trees are specified, all after the bundled
defconfigs. Those rule are patten-matching rules, which means that the
first one to match is used, and the following ones are ignored.
Add a new utility macro, 'reverse', inspired from GMSL, that does what
it says: reverse a list of words.
Use that macro to reverse the list of br2-external trees, so that the
latters win over the formers, and even over bundled ones.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Samuel Martin <s.martin49@gmail.com>
Cc: Romain Naour <romain.naour@openwide.fr>
Cc: Julien CORJON <corjon.j@ecagroup.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
pkg-utils.mk contains various definitions that are used in the package
infrastructures and packages themselves.
However, those definitions can be useful in other parts of Buildroot,
and are already used in a few places that are not related to the package
infrastructure. Also, $(sep) will be needed early in the Makefile when
we eventually support multiple br2-external trees.
Since this file only contains definitions, we can include it anytime.
So, consider that file to no longer be specific to the package infras:
- move it to support and rename it,
- move a few similar definitions from the main Makefile to that file.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Peter Korsgaard <jacmet@uclibc.org>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This change enforces the CMAKE_SYSROOT value set in the toolchainfile.cmake.
This fix overrides the CMake heuristics used to guess it, and turns off some
non-desirable behavior adding "-isystem ..." flags to the compiler command
line, misleading the compiler and making the build failed due to some
unfound standard headers.
Fixes:
http://autobuild.buildroot.net/results/f7e/f7e92678e91a6cb15ccf32d4a7d75b39f49d6000/defconfig
(and others)
Cc: Ben Boeckel <mathstuf@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Since the fortran support is conditional, only enable it when needed.
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Cc: Benjamin Kamath <bkamath@spaceflight.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This patch adds a Vagrant file to buildroot. With this file
you can provision a complete buildroot developing environment
in minutes on all major platforms (Linux/Mac/Windows).
[Peter: bump to 2GB RAM, hardcode Buildroot release, add unzip,
drop website update and tweak manual text as suggested by Yann]
Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
All the complexity with the different ways that CMAKE_C_COMPILER and
CMAKE_C_COMPILER_ARG1 can be set are no longer needed, it's all handled
by the toolchain wrapper now.
Note that it is still necessary to handle this for the host build.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This change prevents CMake from searching outside the sysroot location
for CMake modules when cross-compiling.
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This is rarely needed by packages, but convenient to have when it is.
[Thomas:
- don't define ARM_VARIANT as this name is too global, use
CMAKE_SYSTEM_PROCESSOR_ARM_VARIANT instead.
- don't use ifndef, but a more traditional else clause, for the
non-ARM cases.]
Signed-off-by: Volker Krause <volker.krause@kdab.com>
Reviewed-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Reviewed-by: Romain Naour <romain.naour@openwide.fr>
Acked-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Fix#7280 [1]
When the FORCE option is passed to the set command, the variable is
added/updated in the CMake cache every single time CMake processes this
command.
Because the toolchainfile.cmake prepends architecture/toolchain flags
to the CMAKE_{C,CXX}_FLAGS, this makes the CFLAGS being updated in the
generated Makefiles each time one reconfigures its project. So it
forces the compilation of everything, even when nothing has changed.
[1] https://bugs.busybox.net/show_bug.cgi?id=7280
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Tested-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
(tested the SimpleApp reproduction scenario described in the bug report)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
The linker flags are part of the toolchain configuration, so set them for
the CMake-based packages.
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This patch updates the generated toolchainfile.cmake to use ccache.
When toolchainfile.cmake is used inside Buildroot, using ccache during
the build is driven by a CMake knob: USE_CCACHE, automatically set by
the cmake-package infrastructure and reflecting the BR2_CCACHE value.
Since this toolchainefile.cmake file can be used outside Buildroot, and
this file also set a couple of things (among these: the sysroot cflag,
some pkg-config environment variables), it is important to set the
compiler variables as well to keep the consistency of the
cross-compilation configuration.
So, when it is used outside Buildroot, using ccache for the build is
driven by the ccache program availability.
Note that using ccache for the build is achieved by setting the *_ARG1
CMake variables to let CMake use ccache without failing in detecting
the compiler.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Cc: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
The patch allows sharing or moving the toolchains.
This is a step toward making the toolchain/sdk relocatable.
Closes#6818
[Peter: reword comment as suggested by Thomas]
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Cc: Uwe Strempel <u.strempel@googlemail.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This patch introduces a toolchainfile.cmake.in template which is filled
by Buildroot.
Using a toolchainfile.cmake.in template file allows to avoid overloading
quoting and/or escaping and it becomes much more similar to the
resulting file.
This patch also cleans up the quoting style.
[Peter: drop stdin redirect as suggested by Thomas]
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
A very common mistake done by our users is that they use
output/target/ directory as their root filesystem. Even though this is
loudly documented in our Buildroot manual, people don't read
documentation, so it is not sufficient.
This patch adds a text file named
output/target/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM which explains why
output/target isn't appropriate to use as the root filesystem. The
process is:
* At the beginning of the build, right after the skeleton has been
copied, support/misc/target-dir-warning.txt is copied to
output/target/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM
* In the filesystem images creation code, this file is removed before
launching fakeroot, and restored right after that, so that this
file is not present in the generated root filesystem images.
Note that the file has not been added to the default skeleton for two
reasons:
* It would have annoying to have in our source tree a file named in
capital letters inside system/skeleton/
* The proposed way works even if the user uses a custom skeleton.
[Peter: fixed typo]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Juha Lumme <juha.lumme@gmail.com>
Acked-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
