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[libc] add RT_USING_INTERNAL_LIBC_ONLY macro

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This option is for RT-Thread Nano version.
If select this option, it will not compile components/libc
folder and only use tool chain internal libc. Normally, the
tool chain internal is only cover ISO standard (e.g. armcc),
but some tool chains' internal libc will cover more than
ISO standard (e.g. newlib).
This commit is contained in:
Meco Man
2023-11-21 09:39:42 -05:00
parent d73fd165b0
commit 873fd76b2f
4 changed files with 42 additions and 24 deletions
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24
components/libc/Kconfig
View File

@@ -1,11 +1,27 @@
menu "C/C++ and POSIX layer"
# This is for external libc(e.g. mlib),
# and NOT for newlib or picolibc which are inherent in the toolchains.
# Usually, the external libc should be a software package and select
# RT_USING_EXTERNAL_LIBC in software package's Kconfig
config RT_USING_INTERNAL_LIBC_ONLY
bool "Only use tool chain internal libc"
default n
help
This option is for RT-Thread Nano version.
If select this option, it will not compile components/libc
folder and only use tool chain internal libc. Normally, the
tool chain internal is only cover ISO standard (e.g. armcc),
but some tool chains' internal libc will cover more than
ISO standard (e.g. newlib). However, no matter the cover level
it is, the rt-thread libc leveling layer will not be involved
at all if select this option.
config RT_USING_EXTERNAL_LIBC
depends on !RT_USING_INTERNAL_LIBC_ONLY
bool
help
This is for external libc(e.g. mlib),
and NOT for newlib or picolibc which are inherent in the toolchains.
Usually, the external libc should be a software package and select
RT_USING_EXTERNAL_LIBC in software package's Kconfig
This option is not available for users to select.
source "$RTT_DIR/components/libc/compilers/common/Kconfig"
source "$RTT_DIR/components/libc/posix/Kconfig"

9
components/libc/compilers/SConscript
View File

@@ -7,9 +7,10 @@ cwd = GetCurrentDir()
objs = []
list = os.listdir(cwd)
for d in list:
path = os.path.join(cwd, d)
if os.path.isfile(os.path.join(path, 'SConscript')):
objs = objs + SConscript(os.path.join(d, 'SConscript'))
if not GetDepend('RT_USING_INTERNAL_LIBC_ONLY'):
for d in list:
path = os.path.join(cwd, d)
if os.path.isfile(os.path.join(path, 'SConscript')):
objs = objs + SConscript(os.path.join(d, 'SConscript'))
Return('objs')