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2017-12-18make check: Make valgrind optionalMichael Ellerman1-0/+3
To (slightly) lower the barrier for contributions, we can make valgrind optional with just a small amount of plumbing. This allows make check to run successfully without valgrind. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-05-10pore: Always use libporeOliver O'Halloran1-5/+0
In the days of yore libpore was closed source and people wanted the option to not use it. That's no longer the case so lets ditch all the #ifdef crap. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-02-06Dead code and data eliminationNicholas Piggin1-0/+2
Add an experimental option to do basic dead code and data elimintation with -ffunction-sections/-fdata-sections/--gc-sections. This saves about 80kB of text/data. Also remove the use of of -ffunction-sections by default. This predates git history, but I don't think there is a good reason to use it without --gc-sections. The GCC manual says: Only use these options when there are significant benefits from doing so. When you specify these options, the assembler and linker create larger object and executable files and are also slower. You cannot use gprof on all systems if you specify this option, and you may have problems with debugging if you specify both this option and -g. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-02-06Initial support for the ELFv2 ABINicholas Piggin1-0/+8
Provide an experimental option to compile using ELFv2 ABI even on big endian builds. ELFv2 + BE is not officially supported by the toolchain, but it works quite well. It may be useful as a small step toward a little-endian build. This saves about 200kB of text/data. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-08-18Add global DEBUG make flagBenjamin Herrenschmidt1-1/+6
And use it to control the stack checker, memory poisoning and CCAN's list debugging. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-15Makefile: Support CROSS_COMPILE as well as CROSSMichael Ellerman1-0/+3
A lot of projects use CROSS_COMPILE for specifying the cross compile prefix, so support that as well as CROSS. For example this allows a user to set CROSS_COMPILE once in their environment and build both Linux & Skiboot with the same setting. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> [stewart@linux.vnet.ibm.com: only set if env variable is set] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-12-02Makefile: set CROSS based on archWei Yang1-1/+6
CROSS is used to do the cross compile of skiboot on other platform, while this variable is not necessary on ppc64. When this is set on ppc64, there would be an error. This patch sets the CROSS depends on the arch. Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-11-17Stack checking extensionsBenjamin Herrenschmidt1-0/+5
This patch adds: - Normal builds are done with -fstack-protector (we want to investigate using -fstack-protector-strong on gcc4.9 but for now we just use that - Build with STACK_CHECK=1 will use -fstack-protector-all and -pg and will check the stack in mcount Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-02Initial commit of Open Source releaseBenjamin Herrenschmidt1-0/+39
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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