c406015c38
Previously, CMake defaults to adding various flags to the compile
options, such as `-O3`, `-DNDEBUG`, and `-g`. Here is an excerpt from
CMakeCache.txt:
//Flags used by the C compiler during RELEASE builds.
CMAKE_C_FLAGS_RELEASE:STRING=-O3 -DNDEBUG
//Flags used by the C compiler during RELWITHDEBINFO builds.
CMAKE_C_FLAGS_RELWITHDEBINFO:STRING=-O2 -g -DNDEBUG
We instead change the CMAKE_BUILD_TYPE to 'None' so that CMake
doesn't try to be clever and append extra compile flags. Anything
that depends on seL4 will be unaffected as CMake variables are scoped.
This should have no meaningful change to the kernel's generated code,
as the compile flags were being overridden anyway.
Relevant parts of the build.ninja file for comparison:
- Now, `-DRELEASE=ON`:
FLAGS = -march=armv8-a -D__KERNEL_64__ -std=c99 -Wall -Werror
-Wstrict-prototypes -Wmissing-prototypes -Wnested-externs
-Wmissing-declarations -Wundef -Wpointer-arith -Wno-nonnull
-nostdinc -ffreestanding -fno-stack-protector
-fno-asynchronous-unwind-tables -fno-common -O2 -nostdlib
-fno-pic -fno-pie -mgeneral-regs-only -mno-outline-atomics
-E -CC -I/sel4test-manifest/build/kernel/generated_prune
- Before, `-DRELEASE=ON`:
FLAGS = -march=armv8-a -D__KERNEL_64__ -O3 -DNDEBUG -std=c99 -Wall
-Werror -Wstrict-prototypes -Wmissing-prototypes
-Wnested-externs -Wmissing-declarations -Wundef
-Wpointer-arith -Wno-nonnull -nostdinc -ffreestanding
-fno-stack-protector -fno-asynchronous-unwind-tables
-fno-common -O2 -nostdlib -fno-pic -fno-pie
-mgeneral-regs-only -mno-outline-atomics -E -CC
-I/sel4test-manifest/build/kernel/generated_prune
Note the lack of -O3 -DNDEBUG options.
Signed-off-by: Julia Vassiliki <julia.vassiliki@unsw.edu.au>
The seL4 microkernel
This project contains the source code of seL4 microkernel.
For details about the seL4 microkernel, including details about its formal
correctness proof, please see the sel4.systems website and associated
FAQ.
DOIs for citing recent releases of this repository:
We welcome contributions to seL4. Please see the website for information on how to contribute.
This repository is usually not used in isolation, but as part of the build system in a larger project.
seL4 Basics
- Tutorials
- Overview
- Doc Site
- seL4 libraries
- seL4Test
- Debugging guide
- Benchmarking guide
- Virtualization on seL4
- Host Build Dependencies
- Porting seL4
Community
- Open-source help and support:
See also the contact links on the seL4 website.
Reporting security vulnerabilities
If you believe you have found a security vulnerability in seL4 or related software, we ask you to follow our vulnerability disclosure policy.
Manual
A hosted PDF version of the manual for the most recent release can be found here.
A web version of the API documentation is available as well.
Repository Overview
includeandsrc: C and ASM source code of seL4tools: build toolslibsel4: C bindings for the seL4 ABImanual: LaTeX sources of the seL4 reference manual
Build Instructions
See the seL4 website for build instructions.
Status
- Releases: list of available seL4 releases
- Roadmap: new features in development
- Hardware Support: information about hardware platform ports
- Kernel Options: information about available config options and features
License
See the file LICENSE.md.