The following code response was
Supplier folder detected
Supplier folder detected but no a2l files present
but the response should have been
Supplier folder detected
Supplier a2l files found since the folder DIR_SUPPLIER did exist
and DIR_A2LGEN_SUPPLIER did have a file called Rte.a2l
Ed L Wolf
Technical Advisor - Embedded Software
e.l.w...@cummins.com
Cummins Inc.
Mail Code: C7004
1460 National Road
Columbus, Indiana 47201
United States
From: Martin Dorey <martin.do...@hitachivantara.com>
Sent: Sunday, September 24, 2023 6:02 PM
To: Ed L Wolf <e.l.w...@cummins.com>; bug-make@gnu.org
Subject: Re: Problem setting a variable inside a target
EXTERNAL SENDER: This email originated outside of Cummins. Do not click links
or open attachments unless you verify the sender and know the content is safe.
> The eval statement below highlighted in red is not working
Perhaps you'd expect to see "BADGER is wombat" from:
mad@shuttle:~/tmp/wolf-2023-09-24$ cat Makefile
default:
$(eval BADGER = wombat)
ifeq ($(BADGER),wombat)
echo BADGER is wombat
else
echo BADGER is not wombat
endif
mad@shuttle:~/tmp/wolf-2023-09-24$ make
echo BADGER is not wombat
BADGER is not wombat
mad@shuttle:~/tmp/wolf-2023-09-24$
If that wasn't what you were trying to convey, then perhaps you could concoct a
similarly small example, including what you typed, what the computer said in
response and what your expectation was.
If we look at the results of the first phase of Make described in:
https://www.gnu.org/software/make/manual/html_node/Reading-Makefiles.html
mad@shuttle:~/tmp/wolf-2023-09-24$ make -p nothing 2>&1 | grep -B2 -A1 BADGER
# File has not been updated.
# recipe to execute (from 'Makefile', line 2):
$(eval BADGER = wombat)
echo BADGER is not wombat
mad@shuttle:~/tmp/wolf-2023-09-24$
... then we see that the "BADGER is wombat" arm of the conditional is not even
there to be run when it comes to executing the recipe in the second phase. The
ifeq was "immediate" but the $(eval) was "deferred".
It's a separate matter, but I fear your second red line might be expecting this
behavior:
mad@shuttle:~/tmp/wolf-2023-09-24$ echo *.a2l
*.a2l
mad@shuttle:~/tmp/wolf-2023-09-24$
... which I doubt you're going to get from find(1):
mad@shuttle:~/tmp/wolf-2023-09-24$ find -name "*.a2l"
mad@shuttle:~/tmp/wolf-2023-09-24$
________________________________
From:
bug-make-bounces+martin.dorey=hds....@gnu.org<mailto:bug-make-bounces+martin.dorey=hds....@gnu.org>
<bug-make-bounces+martin.dorey=hds....@gnu.org<mailto:bug-make-bounces+martin.dorey=hds....@gnu.org>>
on behalf of Ed L Wolf <e.l.w...@cummins.com<mailto:e.l.w...@cummins.com>>
Sent: Sunday, September 24, 2023 10:23
To: bug-make@gnu.org<mailto:bug-make@gnu.org>
<bug-make@gnu.org<mailto:bug-make@gnu.org>>
Subject: Problem setting a variable inside a target
***** EXTERNAL EMAIL *****
Hello
I am having some trouble trying to set a variable inside a target. When reading
the variable, it comes up blank. Below is my make file code. The eval statement
below highlighted in red is not working. Can you provide some assistance
please? I am using GNU Make 4.1
$(DIR_A2LGEN_SETUP)/McData-setup.a2l: $(BSW_A2LS)
$(DIR_SCRIPTS)/update_mcdata_a2l.py $(DIR_SCRIPTS)/update_copyright_info.py
$(DIR_SCRIPTS)/merge_a2l_files.py $(DIR_TARGET)/$(PROJECT).odx-f
$(DIR_A2L)/Merger.ini
@echo "A2L $@"
@rm -rf $(DIR_A2LGEN)
@rm -rf $(DIR_A2LLOGS)
@rm -rf $(DIR_A2LGEN_SETUP)
@rm -rf $(DIR_A2LGEN_UPDATE)
@rm -rf $(DIR_A2LGEN_MODIFY)
@rm -rf $(DIR_A2LGEN_CHECK)
@rm -rf $(DIR_A2LGEN_SUPPLIER)
@mkdir -p $(DIR_A2LGEN)
@mkdir -p $(DIR_A2LLOGS)
@mkdir -p $(DIR_A2LGEN_SETUP)
@mkdir -p $(DIR_A2LGEN_UPDATE)
@mkdir -p $(DIR_A2LGEN_MODIFY)
@mkdir -p $(DIR_A2LGEN_CHECK)
@mkdir -p $(DIR_A2LGEN_SUPPLIER)
@find $(DIR_BSWPROJECT) -type f -name "*.a2l" | xargs -i cp {}
$(DIR_A2LGEN_SETUP)
#TODO: IS this still needed
@cp $(DIR_A2L)/_Master*.a2l $(DIR_A2LGEN_SETUP)
@python $(DIR_SCRIPTS)/update_mcdata_a2l.py $(DIR_A2LGEN_SETUP)
@python $(DIR_SCRIPTS)/update_copyright_info.py \
-a $(DIR_A2LGEN_SETUP)/McData.a2l.patched \
-o $(DIR_A2LGEN_SETUP)/McData-copyright.a2l
@python $(DIR_SCRIPTS)/merge_two_files.py \
-f1 $(CAN_A2L) \
-f2 $(DIR_A2LGEN_SETUP)/McData-copyright.a2l \
-sp '/end DAQ' \
-ep '/end IF_DATA' \
-op $(DIR_A2LGEN_SETUP)/McData-copyright-can.a2l
# When there are no supplier a2l files then the merge process doesn't need to
be done.
ifneq ($(wildcard $(DIR_SUPPLIER)),)
@find $(DIR_SUPPLIER) -type f -name "*.a2l" | xargs -i cp {}
$(DIR_A2LGEN_SUPPLIER)
$(eval SUPPLIER_A2l := $(sort $(shell find $(DIR_A2LGEN_SUPPLIER)
-type f -name "*.a2l")))
@echo "A2L Supplier folder detected"
@echo "Supplier a2l $(SUPPLIER_A2l)"
# Just becuase there is a supplier folder does not mean it has a2l files.
ifeq ($(SUPPLIER_A2l),"*.a2l")
@echo "A2L Supplier a2l files found"
@python $(DIR_SCRIPTS)/merge_a2l_files.py \
-s $(DIR_A2LGEN_SUPPLIER) \
-b a2l_file_list_supplier.opt \
-P $(DIR_A2L)/Merger.ini \
-M $(DIR_A2LGEN_SETUP)/McData-copyright-can.a2l \
-O $(DIR_A2LGEN_SETUP)/McData-setup.a2l \
-L $(DIR_A2LLOGS)/Log0-A2LMerger.log \
-g $(DIR_BUILDGEN)
@ASAP2Merger.exe \
@$(DIR_BUILDGEN)/a2l_file_list_supplier.opt \
> $(subst
$(DIR_A2LGEN_SETUP),$(DIR_A2LLOGS),$(@:.a2l=.log)) \
|| echo "A2L
$(DIR_A2LLOGS)/Log0-A2L-Supplier-Merger.log - Check for warnings/errors!"
else
@cp $(DIR_A2LGEN_SETUP)/McData-copyright-can.a2l
$(DIR_A2LGEN_SETUP)/McData-setup.a2l
@echo "A2L Supplier folder detected but no a2l files present"
endif
else
@cp $(DIR_A2LGEN_SETUP)/McData-copyright-can.a2l
$(DIR_A2LGEN_SETUP)/McData-setup.a2l
@echo "A2L Supplier folder not available"
endif
Ed L Wolf
Technical Advisor - Embedded Software
e.l.w...@cummins.com<mailto:e.l.w...@cummins.com>
Cummins Inc.
Mail Code: C7004
1460 National Road
Columbus, Indiana 47201
United States
