ppisa commented on issue #6082:
URL:
https://github.com/apache/incubator-nuttx/issues/6082#issuecomment-1166347130
Hello, I have found time only now and test state with actual NuttX sources.
I test with `tools/configure.sh esp32c3-devkit:twai` but it seems to be
problem with most other architectures.
When I run `make export` then at least `HEAD_OBJ` is not exported.
it is initially defined in `nuttx/arch/risc-v/src/esp32c3/Make.defs`:
```
HEAD_ASRC = esp32c3_head.S
```
It then used in `nuttx/arch/risc-v/src/Makefile`:
```
HEAD_OBJ = $(HEAD_ASRC:.S=$(OBJEXT))
STARTUP_OBJS ?= $(HEAD_OBJ)
```
`nuttx/tools/mkexport.sh`:
```
echo "HEAD_OBJ = ${HEAD_OBJ}" >>"${EXPORTDIR}/scripts/Make.defs"
```
then `nuttx-export-10.3.0/scripts/Make.defs`:
```
HEAD_OBJ =
```
Same problem with `LDENDGROUP` and `LDSTARTGROUP`
`nuttx/tools/Export.mk` does not include `HEAD_OBJ` but it includes
`LDENDGROUP` and `LDSTARTGROUP` which are not exported as well. Even when I add
line for `HEAD_OBJ` it does not help.
`nuttx/tools/Export.mk` includes only.
```
include $(TOPDIR)/.config
include $(EXPORTDIR)/Make.defs
```
The second one is copy of `${TOPDIR}/Make.defs` which is link to
`risc-v/esp32c3/esp32c3-devkit/scripts/Make.defs`.
It includes
```
include $(TOPDIR)/.config
include $(TOPDIR)/tools/Config.mk
include $(TOPDIR)/tools/esp32c3/Config.mk
include $(TOPDIR)/arch/risc-v/src/common/Toolchain.defs
```
But none of these includes group and or head information.
This is only included in `nuttx/arch/risc-v/src/Makefile` but that cannot be
sourced, because it defines too many rules and is not probably prepared for to
be used as source of defines for other Makefiles.
So I think that `LDSTARTGROUP` and `LDENDGROUP` should be defined in
`nuttx/arch/risc-v/src/common/Toolchain.defs`. There should be even explicit
define `LINK_BY_CC` or `LINK_BY_LD` to select if link is done by CC or LD.
Where should be moved define `HEAD_ASRC` and preparation of `HEAD_OBJ` is even
more questionable. It wold be ideal to do the change for all architectures and
boards...
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