Like many other projects, U-Boot has a tradition of including big
blocks of License headers in all files. This not only blows up the
source code with mostly redundant information, but also makes it very
difficult to generate License Clearing Reports. An additional problem
is that even the same lincenses are referred to by a number of
slightly varying text blocks (full, abbreviated, different
indentation, line wrapping and/or white space, with obsolete address
information, ...) which makes automatic processing a nightmare.
To make this easier, such license headers in the source files will be
replaced with a single line reference to Unique Lincense Identifiers
as defined by the Linux Foundation's SPDX project [1]. For example,
in a source file the full "GPL v2.0 or later" header text will be
replaced by a single line:
SPDX-License-Identifier: GPL-2.0+
We use the SPDX Unique Lincense Identifiers here; these are available
at [2].
Note: From the legal point of view, this patch is supposed to be only
a change to the textual representation of the license information,
but in no way any change to the actual license terms. With this patch
applied, all files will still be licensed under the same terms they
were before.
Note 2: The apparent difference between the old "COPYING" and the new
"Licenses/gpl-2.0.txt" only results from switching to the upstream
version of the license which is differently formatted; there are not
any actual changes to the content.
Note 3: There are some recurring questions about linense issues, such
as:
- Is a "All Rights Reserved" clause a problem in GPL code?
- Are files without any license header a problem?
- Do we need license headers at all?
The following excerpt from an e-mail by Daniel B. Ravicher should help
with these:
| Message-ID: <4ADF8CAA.5030808@softwarefreedom.org>
| Date: Wed, 21 Oct 2009 18:35:22 -0400
| From: "Daniel B. Ravicher" <ravicher@softwarefreedom.org>
| To: Wolfgang Denk <wd@denx.de>
| Subject: Re: GPL and license cleanup questions
|
| Mr. Denk,
|
| Wolfgang Denk wrote:
| > - There are a number of files which do not include any specific
| > license information at all. Is it correct to assume that these files
| > are automatically covered by the "GPL v2 or later" clause as
| > specified by the COPYING file in the top level directory of the
| > U-Boot source tree?
|
| That is a very fact specific analysis and could be different across the
| various files. However, if the contributor could reasonably be expected
| to have known that the project was licensed GPLv2 or later at the time
| she made her contribution, then a reasonably implication is that she
| consented to her contributions being distributed under those terms.
|
| > - Do such files need any clean up, for example should we add GPL
| > headers to them, or is this not needed?
|
| If the project as a whole is licensed under clear terms, you need not
| identify those same terms in each file, although there is no harm in
| doing so.
|
| > - There are other files, which include both a GPL license header
| > _plus_ some copyright note with an "All Rights Reserved" clause. It
| > has been my understanding that this is a conflict, and me must ask
| > the copyright holders to remove such "All Rights Reserved" clauses.
| > But then, some people claim that "All Rights Reserved" is a no-op
| > nowadays. License checking tools (like OSLC) seem to indicate this is
| > a problem, but then we see quite a lot of "All rights reserved" in
| > BSD-licensed files in gcc and glibc. So what is the correct way to
| > deal with such files?
|
| It is not a conflict to grant a license and also reserve all rights, as
| implicit in that language is that you are reserving all "other" rights
| not granted in the license. Thus, a file with "Licensed under GPL, All
| Rights Reserved" would mean that it is licensed under the GPL, but no
| other rights are given to copy, modify or redistribute it.
|
| Warm regards,
| --Dan
|
| Daniel B. Ravicher, Legal Director
| Software Freedom Law Center (SFLC) and Moglen Ravicher LLC
| 1995 Broadway, 17th Fl., New York, NY 10023
| (212) 461-1902 direct (212) 580-0800 main (212) 580-0898 fax
| ravicher@softwarefreedom.org www.softwarefreedom.org
[1] http://spdx.org/
[2] http://spdx.org/licenses/
Signed-off-by: Wolfgang Denk <wd@denx.de>
The value of this config variable is not available to image.h on the host,
since the board config is not actually included. Bring this in so that
mkimage will be built with image-signing support for sandbox at least.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present mkimage is set up to always build with image signing support.
This means that the SSL libraries (e.g. libssl-dev) are always required.
Adjust things so that mkimage can be built with and without image signing,
controlled by the presence of CONFIG_FIT_SIGNATURE in the board config file.
If CONFIG_FIT_SIGNATURE is not enabled, then mkimage will report a warning
that signing is not supported. If the option is enabled, but libraries are
not available, then a build error similar to this will be shown:
lib/rsa/rsa-sign.c:26:25: fatal error: openssl/rsa.h: No such file or directory
Signed-off-by: Simon Glass <sjg@chromium.org>
RSA provides a public key encryption facility which is ideal for image
signing and verification.
Images are signed using a private key by mkimage. Then at run-time, the
images are verified using a private key.
This implementation uses openssl for the host part (mkimage). To avoid
bringing large libraries into the U-Boot binary, the RSA public key
is encoded using a simple numeric representation in the device tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
Use -finstrument-functions when tracing is enabled (make FTRACE=1).
Tracing is not currently supported by SPL even if sufficient memory is
available.
When tracing is enabled, we #define FTRACE. This can be used by
board config files to conditionally enable the tracing options.
Signed-off-by: Simon Glass <sjg@chromium.org>
Currently the base setting for CFLAGS is split in two possibilities,
one with -DBUILD_TAG appended at the end and one without, the rest of
CFLAGS is the same in both cases. Change this so CFLAGS are always set
and the -DBUILD_TAG is appended in separate ifdef.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Tom Rini <trini@ti.com>
Reviewed-by: Otavio Salvador <otavio@ossystems.com.br>
At present the generic board error can occur when configuring U-Boot, or
during distclean, but this is incorrect. The existing autoconf.mk may come
from an earlier U-Boot configuration which is about to be overwritten.
Make the error conditional so that it will only be triggered when we are
actually building U-Boot.
This avoids a problem where the system is being reconfigured to remove
CONFIG_SYS_GENERIC_BOARD on an architecture that does not support it.
Currently this will print an error and require the manual removal of
include/autoconf.mk.
Signed-off-by: Simon Glass <sjg@chromium.org>
This new make target "u-boot-img-spl-at-end.bin" consists of the
the real, full-blown U-Boot image and the U-Boot SPL binary
directly attached to it. The full-blown U-Boot image has the
mkimage header included, with its load-address and entry-point.
This will be used by the upcoming lwmon5 PPC440EPx derivate board
port.
Signed-off-by: Stefan Roese <sr@denx.de>
make never uses the SHELL variable from the environment. Instead, it
uses /bin/sh, or the value assigned to the SHELL variable by the Makefile. This
makes the export of the SHELL variable useless for sub-makes (but still useful
for the environment of recipes). However, we want all makes to use the same
shell.
This patch fixes this issue by moving the SHELL variable setup and export to the
top config.mk, so that all Makefile-s including it use the same shell.
Since BASH is used by default, this makes it possible to use things
like 'echo -e ...' in sub-makes, which would otherwise fail e.g. with /bin/sh
symlinked to /bin/dash on Ubuntu.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Reviewed-by: Tom Rini <trini@ti.com>
Albert's rework of the linker scripts conflicted with Simon's making
everyone use __bss_end. We also had a minor conflict over
README.scrapyard being added to in mainline and enhanced in
u-boot-arm/master with proper formatting.
Conflicts:
arch/arm/cpu/ixp/u-boot.lds
arch/arm/cpu/u-boot.lds
arch/arm/lib/Makefile
board/actux1/u-boot.lds
board/actux2/u-boot.lds
board/actux3/u-boot.lds
board/dvlhost/u-boot.lds
board/freescale/mx31ads/u-boot.lds
doc/README.scrapyard
include/configs/tegra-common.h
Build tested for all of ARM and run-time tested on am335x_evm.
Signed-off-by: Tom Rini <trini@ti.com>
We are introducing a new unified board setup. Add a check to make sure that
board config files do not define CONFIG_SYS_GENERIC_BOARD unless their
architecture defines __HAVE_ARCH_GENERIC_BOARD
__HAVE_ARCH_GENERIC_BOARD will currently not be the default setting, but
we can switch this later when most architecture support generic board.
Signed-off-by: Simon Glass <sjg@chromium.org>
Refactor linker-generated array code so that symbols
which were previously linker-generated are now compiler-
generated. This causes relocation records of type
R_ARM_ABS32 to become R_ARM_RELATIVE, which makes
code which uses LGA able to run before relocation as
well as after.
Note: this affects more than ARM targets, as linker-
lists span possibly all target architectures, notably
PowerPC.
Conflicts:
arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds
arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds
arch/arm/cpu/armv7/omap-common/u-boot-spl.lds
board/ait/cam_enc_4xx/u-boot-spl.lds
board/davinci/da8xxevm/u-boot-spl-da850evm.lds
board/davinci/da8xxevm/u-boot-spl-hawk.lds
board/vpac270/u-boot-spl.lds
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
This patch adds essential components for generation of the contents of
the linker section that is used by the linker-generated array. All of
the contents is held in a separate file, u-boot.lst, which is generated
at runtime just before U-Boot is linked.
The purpose of this code is to especially generate the appropriate
boundary symbols around each subsection in the section carrying the
linker-generated arrays. Obviously, the interim linker code for actual
placement of the variables into the section is generated too. The
generated file, u-boot.lst, is included into u-boot.lds via the linker
INCLUDE directive in u-boot.lds .
Adjustments are made in the Makefile and spl/Makefile so that the
u-boot.lds and u-boot-spl.lds depend on their respective .lst files.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Tested-by: Joe Hershberger <joe.hershberger@ni.com>
Add support for running source code checkers on u-boot source, e.g.,
using sparse to aid with typechecking. This comes in especially
handy as SoC vendors mix and match cores and devices with different
endianness, thus here we add CHECK_ENDIAN to the otherwise linux
kernel default CHECKFLAGS.
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Compile drivers/serial/serial.c by default both into SPL and into
non-SPL builds, since CONFIG_SERIAL_MULTI is now the default state.
Also having common/serial.c in by default now, it's pointless to keep
-DCONFIG_SERIAL_MULTI in CPPFLAGS any longer, so remove it as well.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefan Roese <sr@denx.de>
Enable CONFIG_SERIAL_MULTI for all builds of U-Boot. That includes
both SPL builds and non-SPL builds, everything. To avoid poluting
this patch with removal of ifdef-endif constructions containing
CONFIG_SERIAL_MULTI, the CONFIG_SERIAL_MULTI is temporarily added
into CPPFLAGS in config.mk . This will be again removed in following
patch.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
This patch makes sure that we always use the GNU ld. U-Boot uses certain
construct e.g. OVERLAY which are not implemented in gold therefore it
always needs GNU ld for linking.
It works well if default linker in toolchain is GNU ld but in some
cases we can have gold to be the default linker and also ship GNU ld
but not as default in such cases its called $(PREFIX)ld.bfd, with this
patch we make sure that if $(PREFIX)ld.bfd exists than we use that for
our ld.
This way it does not matter what the default ld is.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
On x600 (SPEAr600) U-Boot is appended to U-Boot SPL. Both images are
created using mkimage (crc etc), so that the ROM bootloader can check
its integrity. Padding needs to be done to the SPL image (with
mkimage header) and not the binary. Otherwise the resulting image
which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
The resulting image containing both U-Boot images is called u-boot.spr.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Amit Virdi <amit.virdi@st.com>
Cc: Vipin Kumar <vipin.kumar@st.com>
Apply memoization to cc-option macro by caching the results of the
gcc calls. This macro is called very often so using cached results
leads to faster compilation times.
The old behaviour can be restored by defining the config option
CONFIG_CC_OPT_CACHE_DISABLE=y.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
U-Boot Makefiles contain a number of tests for compiler features etc.
which so far are executed again and again. On some architectures
(especially ARM) this results in a large number of calls to gcc.
This patch makes sure to run such tests only once, thus largely
reducing the number of "execve" system calls.
Example: number of "execve" system calls for building the "P2020DS"
(Power Architecture) and "qong" (ARM) boards, measured as:
-> strace -f -e trace=execve -o /tmp/foo ./MAKEALL <board>
-> grep execve /tmp/foo | wc -l
Before: After: Reduction:
==================================
P2020DS 20555 15205 -26%
qong 31692 14490 -54%
As a result, built times are significantly reduced, typically by
30...50%.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Albert Aribaud <albert.aribaud@free.fr>
cc: Graeme Russ <graeme.russ@gmail.com>
cc: Mike Frysinger <vapier@gentoo.org>
Tested-by: Graeme Russ <graeme.russ@gmail.com>
Tested-by: Matthias Weisser <weisserm@arcor.de>
Tested-by: Sanjeev Premi <premi@ti.com>
Tested-by: Simon Glass <sjg@chromium.org>
Tested-by: Macpaul Lin <macpaul@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
This new option allows U-Boot to embed a binary device tree into its image
to allow run-time control of peripherals. This device tree is for U-Boot's
own use and is not necessarily the same one as is passed to the kernel.
The device tree compiler output should be placed in the $(obj)
rooted tree. Since $(OBJCOPY) insists on adding the path to the
generated symbol names, to ensure consistency it should be
invoked from the directory where the .dtb file is located and
given the input file name without the path.
This commit contains my entry for the ugliest Makefile / shell interaction
competition.
Signed-off-by: Simon Glass <sjg@chromium.org>
People keep adding new code that still uses $(AR) instead of
$(cmd_link_o_target), so turn it into a build time error.
We still use $(AR) locally, but we don't use $(ARFLAGS).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The dependency rules are currently done in a shell 'for' loop. This does not
permit Makefile variables to adjust preprocessor flags as is done with normal
compile flags, using the CFLAGS_path/file.o syntax.
This change moves the dependency generation into the Makefile itself, and
permits a CPPFLAGS_path/file.o to adjust preprocessor flags on a file or
directory basis.
The CPPFLAGS_... variable is also folded into CFLAGS during the build.
Signed-off-by: Simon Glass <sjg@chromium.org>
Some toolchains enable security warning flags by default, but these don't
really make sense in the u-boot world. Such as forcing changes like:
-printf(foo);
+printf("%s", foo);
So disable the flags when the compiler supports them. Linux has already
merged a similar change in their build system.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
LDSCRIPT is used only from the top-level Makefile and only when the
system is configured so we can move LDSCRIPT and CONFIG_SYS_LDSCRIPT
related logic into the top level Makefile and under configured condition
to avoid errors when building tools from unconfigured tree.
Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Currently, some linker scripts are found by common code in config.mk.
Some are found using CONFIG_SYS_LDSCRIPT, but the code for that is
sometimes in arch config.mk and sometimes in board config.mk. Some
are found using an arch-specific rule for looking in CPUDIR, etc.
Further, the powerpc config.mk rule relied on CONFIG_NAND_SPL
when it really wanted CONFIG_NAND_U_BOOT -- which covered up the fact
that not all NAND_U_BOOT builds actually wanted CPUDIR/u-boot-nand.lds.
Replace all of this -- except for a handful of boards that are actually
selecting a linker script in a unique way -- with centralized ldscript
finding.
If board code specifies LDSCRIPT, that will be used.
Otherwise, if CONFIG_SYS_LDSCRIPT is specified, that will be used.
If neither of these are specified, then the central config.mk will
check for the existence of the following, in order:
$(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds (only if CONFIG_NAND_U_BOOT)
$(TOPDIR)/$(CPUDIR)/u-boot-nand.lds (only if CONFIG_NAND_U_BOOT)
$(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
$(TOPDIR)/$(CPUDIR)/u-boot.lds
Some boards (sc3, cm5200, munices) provided their own u-boot.lds that
were dead code, because they were overridden by a CPUDIR u-boot.lds under
the old powerpc rules. These boards' own u-boot.lds have bitrotted and
no longer work -- these lds files have been removed.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Tested-by: Graeme Russ <graeme.russ@gmail.com>
commit 8aba9dceeb
Divides variable of linker flags to LDFLAGS-u-boot and LDFLAGS
breaks the usage of --gc-section to build nand_spl. We still need linker option
--gc-section for every uboot image, not only the main one. LDFLAGS_FINAL passes
the --gc-sections to each uboot image.
To get the proper linker flags, we use LDFLAGS and LDFLAGS_FINAL to replace
PLATFORM_LDFLAGS in the Makefile of each nand_spl board.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Seems to me that the top level config.mk should include
the auto generated include/config.mk so that all Makefile's
pickup those definitions.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Linker needs to use the proper endian/bfd flags even when doing partial linking.
LDFLAGS_u-boot sets linker option which is called it when U-boot is built
(u-boot final).
LDFLAGS sets necessary option by partial linking (use in cmd_link_o_target).
CC: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Multiple rules are using the expanded AFLAGS/CFLAGS settings and some are
getting so long that the rules need to be line wrapped. So unify them in
one variable, use that variable in the rule, and then unwrap things. This
makes the actual `make` output nicer as it doesn't have line continuations
in it anymore.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils. As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".
This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.
The name of each former library archive is preserved except for
extensions which change from ".a" to ".o". This commit updates
references accordingly where needed, in particular in some linker
scripts.
This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols. Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.
Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>
The change is currently needed to be able to remove the board
configuration scripting from the top level Makefile and replace it by
a simple, table driven script.
Moving this configuration setting into the "CONFIG_*" name space is
also desirable because it is needed if we ever should move forward to
a Kconfig driven configuration system.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Simply trying to include a basic header file like stdlib.h on OS X 10.5
and then building with -traditional-cpp fails with lots of errors like:
In file included from /usr/include/stdlib.h:63,
from test.c:3:
/usr/include/available.h:85: error: stray '#' in program
/usr/include/available.h:85: error: syntax error before numeric constant
/usr/include/available.h:86: error: stray '#' in program
In the past, I hadn't noticed because the old logic for these flags were
restricted to Darwin running on PowerPC systems while I'm running on an
Intel system. But after some recent clean ups and changes, the flag was
being applied to all Darwin systems and my host tools broke.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Compiling tools subdirectory on Mac OS X 10.6 (Snow Leopard) complains about
wrong syntax in system includes.
In file included from /usr/include/stdio.h:444,
from ../source/u-boot/include/compiler.h:26,
from ../source/u-boot/lib/crc32.c:15:
/usr/include/secure/_stdio.h:46: error: syntax error in macro parameter list
This can be fixed by reverting the workaround for prior OS X releases in
config.mk conditionally for OS X 10.6+.
Signed-off-by: Andreas Biemann <andreas.devel@googlemail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk
This change is intended to clean up the top-level directory structure
and more closely mimic Linux's directory organization.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Previously, a specific file or directory could be compiled with custom
CFLAGS by adding a Makefile variable such as:
CFLAGS_dlmalloc.o = <custom flags for common/dlmalloc.c>
or
CFLAGS_lib = <custom flags for lib directory>
This method breaks down once multiple files or directories share the
same path. Eg FLAGS_fileA = <custom flags> would incorrectly result in
both dir1/fileA.c and dir2/fileA.c being compiled with <custom flags>.
This change allows finer grained control which we need once we move
lib_$ARCH to arch/$ARCH/lib/ and lib_generic/ to lib/. Without this
change all lib/ directories would share the same custom CFLAGS.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
The CPUDIR variable points to the location of a target's CPU directory.
Currently, it is set to cpu/$CPU. However, using $CPUDIR will allow for
more flexibility in the future. It lays the groundwork for reorganizing
U-Boot's directory structure to support a layout such as:
arch/$ARCH/cpu/$CPU/* (architecture with multiple CPU types)
arch/$ARCH/cpu/* (architecture with one CPU type)
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Currently, some of the tools instead set CC to be HOSTCC in order to re-use
some pattern rules -- but this fails when the user overrides CC on the make
command line. Also, the HOSTCFLAGS in tools/Makefile are currently not
being used because config.mk overwrites them.
This patch adds static pattern rules for files that have been requested to
be built with the native compiler using $(HOSTSRCS) and $(HOSTOBJS), and
converts the tools to use them.
It restores easylogo to using the host compiler, which was broken by commit
38d299c2db (if this was an intentional change,
please let me know -- but it seems to be a build tool).
It restores -pedantic and the special flags for darwin and cygwin that were
requested in tools/makefile (but keeps the flags added by config.mk) --
hopefully someone can test this on those platforms. It no longer
conditionalizes -pedantic on not being darwin; it wasn't clear that that was
intentional, and unless there's a real problem it's just inviting people to
contribute non-pedantic patches to those files (I'm not a fan of -pedantic
personally, but if it's on for one platform it should be on for all).
HOST_LDFLAGS is renamed HOSTLDFLAGS for consistency with the previous
HOST_CFLAGS to HOSTCFLAGS rename. A new HOSTCFLAGS_NOPED is made available
for those files which currently cannot be built with -pedantic, and replaces
the old FIT_CFLAGS.
imls now uses the cross compiler properly, rather than by trying to
reconstruct CC using the typoed $(CROSS_COMPILER).
envcrc.c is now dependency-processed unconditionally -- previously it would
be built without being on (HOST)SRCS if CONFIG_ENV_IS_EMBEDDED was not
selected.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Some board ports place TEXT_BASE at a location that would cause the
RESET_VECTOR_ADDRESS not to be at 0xfffffffc when we link. By default
we assume RESET_VECTOR_ADDRESS will be 0xfffffffc if the board doesn't
explicitly set it.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Wolfgang Denk <wd@denx.de>
Start a common header file for common linker script code (such as
workarounds for older linkers) rather than doing this in the build system.
As fallout, we no longer execute the linker every time config.mk is
included by a build file (which can easily be 70+ times), but rather only
execute it once.
This also fixes a bug in the major version checking by creating a macro to
easily compare versions and keep people from making the same common
mistake (forgetting to check major and minor together).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Commit f62fb99941 fixed handling of all rodata sections by using a
wildcard combined with calls to ld's builtin functions SORT_BY_ALIGNMENT()
and SORT_BY_NAME(). Unfortunately these functions were only
introduced with biunutils version 2.16, so the modification broke
building with all tool chains using older binutils.
This patch makes it work again. This is done by omitting the use of
these functions for such old tool chains. This will result in
slightly larger target binaries, as the rodata sections are no longer
in optimal order alignment-wise which reauls in unused gaps, but the
effect was found to be insignificant - especially compared to the fact
that you cannot build U-Boot at all in the current state.
As ld seems to have no support for conditionals we run the linker
script through the C preprocessor which can be easily used to remove
the unwanted function calls.
Note that the C preprocessor must be run with the "-ansi" (or a
"-std=") option to make sure all the system-specific predefined
macros outside the reserved namespace are suppressed. Otherise, cpp
might for example substitute "powerpc" to "1", thus corrupting for
example "OUTPUT_ARCH(powerpc)" etc.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
For some time there have been repeated reports about build problems
with some ARM (cross) tool chains. Especially issues about
(in)compatibility with the tool chain provided runtime support
library libgcc.a caused to add and support a private implementation
of such runtime support code in U-Boot. A closer look at the code
indicated that some of these issues are actually home-made. This
patch attempts to clean up some of the most obvious problems and make
building of U-Boot with different tool chains easier:
- Even though all ARM systems basicy used the same compiler options
to select a specific ABI from the tool chain, the code for this was
distributed over all cpu/*/config.mk files. We move this one level
up into lib_arm/config.mk instead.
- So far, we only checked if "-mapcs-32" was supported by the tool
chain; if yes, this was used, if not, "-mabi=apcs-gnu" was
selected, no matter if the tool chain actually understood this
option. There was no support for EABI conformant tool chains.
This patch implements the following logic:
1) If the tool chain supports
"-mabi=aapcs-linux -mno-thumb-interwork"
we use these options (EABI conformant tool chain).
2) Otherwise, we check first if
"-mapcs-32"
is supported, and then check for
"-mabi=apcs-gnu"
If one test succeeds, we use the first found option.
3) In case 2), we also test if "-mno-thumb-interwork", and use
this if the test succeeds. [For "-mabi=aapcs-linux" we set
"-mno-thumb-interwork" mandatorily.]
This way we use a similar logic for the compile options as the
Linux kernel does.
- Some EABI conformant tool chains cause external references to
utility functions like raise(); such functions are provided in the
new file lib_arm/eabi_compat.c
Note that lib_arm/config.mk gets parsed several times, so we must
make sure to add eabi_compat.o only once to the linker list.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Dirk Behme <dirk.behme@googlemail.com>
Cc: Magnus Lilja <lilja.magnus@gmail.com>
Cc: Tom Rix <Tom.Rix@windriver.com>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Acked-by: Sergey Kubushyn <ksi@koi8.net>
Tested-by: Magnus Lilja <lilja.magnus@gmail.com>
Tested-by: Andrzej Wolski <awolski@poczta.fm>
Tested-by: Gaye Abdoulaye Walsimou <walsimou@walsimou.com>
Tested-by: Tom Rix <Tom.Rix@windriver.com>
Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
