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>
Make.defs under board folder can still overwrite the default as needed
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: I1c300a8ace4b54d475ef8d398661ed65ca273a2e
so all boards support uClibc++/libc++ automatically
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: Ibe6fafbec57f7acb26ea6188a3e9923ea82295c5
Only Make.defs files tht followed the same pattern as the ARM Make.defs were modified. This excludes some of the sim and renesas Make.defs files and all of the z80 Make.defs files.
So call 'make EXTRAFLAGS=-Wno-cpp' could suppress the warnings with pre-processor
directive #warning in GCC.
Change-Id: Iaa618238924c9969bf91db22117b39e6d2fc9bb6
Signed-off-by: liuhaitao <liuhaitao@xiaomi.com>
* arch: x86_64: Pour-in the x86_64 code from cRTOS repository, excluding modifications of NuttX kernel, jailhouse support and linux compatibility layer
* arch: x86_64: Refactor x86_64 loading procedure for better comprehension and included support for multiboot2
* arch: x86_64: Locate the kernel at 4GB~ and modify the page table initializing procedure accordingly
* arch: x86_64: Implemented kconfig option for various x86_64 capabilities, dynamic probe and check capability on lowsetup before enabling
* arch: x86_64: inte64_check_capability: Use Marco to prettify the capability checking procedure
* arch: x86_64: intel64_timerisr.c: Refactor with new frequency calibrating method
* arch: x86_64: Fix C alias of page table and GDT/IST
* arch: x86_64: Reload GTDR with GDT in high address in up_lowsetup
* arch: x86_64: Consolidate MSR definition in arch/arch.h
* arch: x86_64: Edit the way of handling GDT/IST in C into structures
* arch: x86_64: Correct the starting point of isr/irq stack
* arch: x86_64: Update up_initialize.c with the new initializing procedure
* arch: x86_64: up_map_region now take flags instead of assuming WR/PRESENT
* arch: x86_64: Overhual of interrupt initialization procedure
* arch: x86_64: Properly configure the heap to be memory as [_ebss, end of memory]
* arch: x86_64: Try to probe the TSC frequency, fall-back to user specified frequency on failure
* arch: x86_64: Remove debug printing during restore_aux, causing infinite CTX bug
* arch: x86_64: for X86 16500 serial interrupt to work, OUT2 of MCR must be 1. Make it stuck at 1 after boot
* arch: x86_64: Correctly apply license header, comment and format code
* arch: x86_64: properly send a SIGFPE on floating point error
* arch: x86_64: Remove unused variable in up_restore_auxstate
* arch: x86_64: properly trash the processor with an infinite loop
* arch: x86_64: Fix typo in ISR handler causing ISR not handled
* arch: x86_64: Fix possibile race conditions with scheduler debug option on in signal handling path
* arch: x86_64: Fix typo in MSR_X2APIC_LVTT_TSC_DEADLINE
* arch: x86_64: Migrate tickless implementation to the new MSR naming and frequency calibration method
* board: x86_64: qemu: Add guard to exclude up_netinitialize when compiling without net support
* arch: x86_64: update defconfigs
* arch: x86_64: rename qemu as qemu-intel64
* arch: x86_64: update Board readme
