b88561299b
In the current compilation environment, the recursive assignment(=) for compile
flags will be delayed until every file is actually need to be compile.
For example:
--------------------------------------------------------------------------------
arch/arm/src/Makefile:
INCLUDES += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
INCLUDES += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)common}
INCLUDES += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)$(ARCH_SUBDIR)}
INCLUDES += ${shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)sched}
CPPFLAGS += $(INCLUDES) $(EXTRAFLAGS)
CFLAGS += $(INCLUDES) $(EXTRAFLAGS)
CXXFLAGS += $(INCLUDES) $(EXTRAFLAGS)
AFLAGS += $(INCLUDES) $(EXTRAFLAGS)
--------------------------------------------------------------------------------
All compilation options will be included recursively,
which will be delayed until the compilation options are actually used:
tools/Config.mk:
--------------------------------------------------------------------------------
define COMPILE
@echo "CC: $1"
$(Q) $(CC) -c $(CFLAGS) $($(strip $1)_CFLAGS) $1 -o $2
endef
--------------------------------------------------------------------------------
All compile flags to be reexecuted $(INCDIR) as long as one file needs to be compiled,
but in fact, the compilation options have not changed in the current directory.
So the we recommand to change the syntax of assignment
From
Recursive (=)
To
Simple (:=)
In this way, we can ensure that all compilation options are expanded only once and reducing repeated works.
Signed-off-by: chao.an <anchao@xiaomi.com>
|
||
|---|---|---|
| .. | ||
| configs/nsh | ||
| include | ||
| scripts | ||
| src | ||
| Kconfig | ||
| README.txt | ||
README
======
The NuttX configuration for the Olimex STM32-P207 is assembled mainly
from the configurations stm32f4discovery and stm3240g-eval.
It was tested with the NuttX EABI "buildroot" Toolchain.
Debugging with OpenOCD via an Olimex ARM-USB-TINY-H works. Note that
CONFIG_DEBUG_SYMBOLS and CONFIG_STM32_DISABLE_IDLE_SLEEP_DURING_DEBUG
are enabled so that the JTAG connection is not disconnected by the idle
loop.
The following peripherals are enabled in this configuration.
- LEDs: show the system status
- Buttons: TAMPER-button, WKUP-button, J1-Joystick (consists of RIGHT-,
UP-, LEFT-, DOWN-, and CENTER-button). Built in app
'buttons' works.
- ADC: ADC1 samples the red trim potentiometer AN_TR
Built in app 'adc' works.
- USB-FS-OTG: Enabled but not really tested, since there is only a
USB-A-connector (host) connected to the full speed STM32
inputs.
- USB-HS_OTG: The other connector (device) is connected to the high speed
STM32 inputs (not enabled).
- CAN: Built in app 'can' works, but apart from that not really tested.
- Ethernet: Ping to other station on the network works.