mirror of
https://github.com/zephyrproject-rtos/zephyr
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5bc458a0fa
This trick was pioneered in Linux as the config_enabled() macro. The
madness has the effect of taking a macro value that may be defined to
"1" (e.g. CONFIG_MYFEATURE), or may not be defined at all and turning
it into a literal expression that can be used at "runtime". That is,
it works similarly to "defined(CONFIG_MYFEATURE)" does except that it
is an expansion that can exist in a standard expression and be seen by
the compiler and optimizer. Thus much #ifdef usage can be replaced
with cleaner expressions like:
if (IS_ENABLED(CONFIG_MYFEATURE))
myfeature_enable();
Change-Id: I40657d2aa3f802429ac33675a1fe245a5da86615
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
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| .. | ||
| arch | ||
| bluetooth | ||
| debug | ||
| display | ||
| drivers | ||
| fs | ||
| linker | ||
| logging | ||
| misc | ||
| net | ||
| shell | ||
| toolchain | ||
| usb | ||
| adc.h | ||
| aio_comparator.h | ||
| atomic.h | ||
| cache.h | ||
| clock_control.h | ||
| counter.h | ||
| device.h | ||
| disk_access.h | ||
| dma.h | ||
| eth.h | ||
| flash.h | ||
| fs.h | ||
| gpio.h | ||
| i2c.h | ||
| init.h | ||
| ipm.h | ||
| irq_offload.h | ||
| irq.h | ||
| kernel_version.h | ||
| kernel.h | ||
| legacy.h | ||
| linker-defs.h | ||
| linker-tool-gcc.h | ||
| linker-tool.h | ||
| microkernel.h | ||
| nanokernel.h | ||
| pinmux.h | ||
| power.h | ||
| pwm.h | ||
| random.h | ||
| rtc.h | ||
| section_tags.h | ||
| sections.h | ||
| sensor.h | ||
| shared_irq.h | ||
| spi.h | ||
| sw_isr_table.h | ||
| sys_clock.h | ||
| sys_io.h | ||
| toolchain.h | ||
| uart.h | ||
| watchdog.h | ||
| zephyr.h | ||