config TARGET_ROOTFS_ISO
bool "iso"
default n
- depends TARGET_ROOTFS_INITRAMFS && TARGET_x86
+ depends on TARGET_x86_generic
+ depends !TARGET_ROOTFS_INITRAMFS
help
Create some bootable ISO image
debugging files into. Enable this option to be able to read and
write to these files.
+ config KERNEL_PERF_EVENTS
+ bool
+ default n
+
config KERNEL_PROFILING
bool "Compile the kernel with profiling enabled"
default n
+ select KERNEL_PERF_EVENTS
help
Enable the extended profiling support mechanisms used by profilers such
as OProfile.
config PKG_BUILD_PARALLEL
bool
prompt "Compile certain packages parallelized"
- default n
+ default y
help
This adds a -jX option to certain packages that are known to
- behave well for parallel build.
-
- Note that this may overcommit CPU resources depending on the
- -j level of the main make process, the number of package
- submake jobs selected below and the number of actual CPUs present.
- Example: If the main make is passed a -j4 and the submake -j
- is also set to 4, we may end up with 16 parallel make processes
- in the worst case.
-
- You get maximum build performance, if you set the package build
- jobs to the number of CPUs (cores) available and also start the main
- make process with -jX, where X is the number of CPUs (cores).
- However, make sure you have enough RAM available for
- NR_CPUS to the power of two (NR_CPUS^2) make jobs.
+ behave well for parallel build. By default the package make processes
+ use the main jobserver, in which case this option only takes effect
+ when you add -jX to the make command.
If you are unsure, select N.
This passes the main make process jobserver fds to package builds,
enabling full parallelization across different packages
+ Note that disabling this may overcommit CPU resources depending on the
+ -j level of the main make process, the number of package
+ submake jobs selected below and the number of actual CPUs present.
+ Example: If the main make is passed a -j4 and the submake -j
+ is also set to 4, we may end up with 16 parallel make processes
+ in the worst case.
+
+
config PKG_BUILD_JOBS
int
prompt "Number of package submake jobs (2-512)"