[SOLVED] Why is my assignment operation not working in GNU make files?

TB0ne · 08-01-2022, 10:58 AM

Quote:

Originally Posted by rpittala

@TB0ne, When I am able to reproduce the problem with a simple make file. Why do you need an actual make file?

Either answer questions and provide details or don't...if you don't, there's NOTHING we can help you with. AGAIN:

You have *TEN YEARS* experience with this so far.
You WILL NOT answer questions (command(s) you've used? Exact messages??)
You mention both Solaris and RHEL...the makefile syntax is different as you well know.

Want help??? Then answer the questions asked, and provide the makefile. Otherwise, figure it out yourself, because we can't help you until you actually give us answers.

pan64 · 08-01-2022, 11:00 AM

Quote:

Originally Posted by rpittala

@TB0ne, When I am able to reproduce the problem with a simple make file. Why do you need an actual make file?

The makefile works in a quite unusual way, not like a script or progrmming language. Therefore posting only one line of a makefile is completely pointless.
From the other hand I think a line like this:

Code:

/home/rpittala/source/code/check_buffer_size.o   := C_SOURCE_CODE_LOCATION_OPTIONS=-i=$(BUILD_SUPPORT)/external_block_options.h

is either incorrect or just not copied properly.
I guess the fist := should be a : (without =), but this is only a wild guess and probably won't solve anything. Without knowing the other parts of the makefile hard to say anything.

You may try to use the -p flag too (if you wish)

Code:

# instead of 
make all <some args>
# add a -p:
make all <some args> -p

TB0ne · 08-01-2022, 11:03 AM

Quote:

Originally Posted by pan64

The makefile works in a quite unusual way, not like a script or progrmming language. Therefore posting only one line of a makefile is completely pointless.
From the other hand I think a line like this:

Code:

/home/rpittala/source/code/check_buffer_size.o   := C_SOURCE_CODE_LOCATION_OPTIONS=-i=$(BUILD_SUPPORT)/external_block_options.h

is either incorrect or just not copied properly.
I guess the fist := should be a : (without =), but this is only a wild guess and probably won't solve anything. Without knowing the other parts of the makefile hard to say anything.

You may try to use the -p flag too (if you wish)

Code:

# instead of 
make all <some args>
# add a -p:
make all <some args> -p

Agreed; but someone with a decade of experience with makefiles (such as the OP) should be well aware of how they work.

dugan · 08-01-2022, 01:20 PM

Quote:

Originally Posted by rpittala

I can not send the complete make files. But, I have created a sample make for our understanding:

Code:

C_SOURCE_FLOATING_POINT_OPTIONS=-tPPCE200Z7NEN -WDDFP=N
FLOATING_POINT_OPTIONS=-tPPCE200Z7NEF -WDDFP=G
#C_SOURCE_FLOATING_POINT_OPTIONS := $(FLOATING_POINT_OPTIONS)
CFLAGS  := C_SOURCE_FLOATING_POINT_OPTIONS=$(FLOATING_POINT_OPTIONS)
hello: 
        echo"-->$(CFLAGS) ==> ==> $(C_SOURCE_FLOATING_POINT_OPTIONS) \n"

I just get "nothing to do for 'hello'."

But

Have you tried quoting?

Code:

C_SOURCE_FLOATING_POINT_OPTIONS="-tPPCE200Z7NEN -WDDFP=N"
FLOATING_POINT_OPTIONS="-tPPCE200Z7NEF -WDDFP=G"
CFLAGS  := "C_SOURCE_FLOATING_POINT_OPTIONS=$(FLOATING_POINT_OPTIONS)"
hello: 
        echo"-->$(CFLAGS) ==> ==> $(C_SOURCE_FLOATING_POINT_OPTIONS) \n"

TB0ne · 08-01-2022, 02:10 PM

Thought this sounded familiar...from five years ago, and since:
https://www.linuxquestions.org/quest...ry-4175605788/
https://www.linuxquestions.org/quest...ld-4175631261/

computersavvy · 08-01-2022, 05:36 PM

I do not need the Makefile.

I do need you to understand that solaris and RHEL are NOT THE SAME!

The compiler is different, the pre-compiler is different, the make syntax is different, the header files may be different, etc.

This is not an error in the OS used, or in the Makefile. This is an error in understanding by the user who cannot visualize that different OSes are in fact different in many ways under the hood.

Why are the results different you ask? Because you are working on a different OS. Plain and simple.

If you want the same results on 2 different machines they must have almost all the relevant software identical on each.

rpittala · 08-09-2022, 03:15 PM

@TBone It actually worked for me when I placed : (without =) at the starting and the problem I came across was that when I used the same operation (i.e., with :=)on GNU make version on Solaris 3.81 it worked without any problem.

Code:

/home/rpittala/source/code/check_buffer_size.o: C_SOURCE_CODE_LOCATION_OPTIONS=-i=$(BUILD_SUPPORT)/external_block_options.h

Worked with 4.1 and 3.81. But, looks like something wrong with 3.82:
https://bugzilla.redhat.com/show_bug.cgi?id=1323206

Those who have scolded me, Calm Yourself. Thanks to those who suggested solutions with limited code.

TB0ne · 08-09-2022, 04:15 PM

Quote:

Originally Posted by rpittala

@TBone It actually worked for me when I placed : (without =) at the starting and the problem I came across was that when I used the same operation (i.e., with :=)on GNU make version on Solaris 3.81 it worked without any problem.

Code:

/home/rpittala/source/code/check_buffer_size.o: C_SOURCE_CODE_LOCATION_OPTIONS=-i=$(BUILD_SUPPORT)/external_block_options.h

Worked with 4.1 and 3.81. But, looks like something wrong with 3.82: https://bugzilla.redhat.com/show_bug.cgi?id=1323206

Those who have scolded me, Calm Yourself. Thanks to those who suggested solutions with limited code.

So when you read the error message and modified things, it actually worked??? Good to know. Again, you telling us this is absolutely meaningless, since no one here (or anyone who comes across this thread) will know the CONTEXT OF WHAT YOU DID OR WHY. Again, you've had TEN YEARS of working with things like this, and have been asked repeatedly to post information, but don't.

Again: no one here can tell why what you did worked, since you've given no one any details.

computersavvy · 08-09-2022, 08:10 PM

Actually @TBOne, he did say what worked, (though you have to read between the lines to know what distro and version).
He said that replacing the ":=" with ":" worked, while the ":=" worked on Solaris 3.81. He seems to imply that the change was required for solaris 3.82 but does not clearly say that.

I went back over the thread and in post #10 he clearly states it was failing for RHEL 7.9. His final post obfuscates that by blathering on about different versions of solaris.

rpittala · 08-09-2022, 10:04 PM

Hi All,
What you guys need here ? as I have already mentioned that the below example is what I have and here it worked for me now:

Code:

C_SOURCE_FLOATING_POINT_OPTIONS=-tPPCE200Z7NEN -WDDFP=N
FLOATING_POINT_OPTIONS=-tPPCE200Z7NEF -WDDFP=G
#C_SOURCE_FLOATING_POINT_OPTIONS := $(FLOATING_POINT_OPTIONS)
CFLAGS: C_SOURCE_FLOATING_POINT_OPTIONS=$(FLOATING_POINT_OPTIONS)
hello: 
        echo"-->$(CFLAGS) ==> ==> $(C_SOURCE_FLOATING_POINT_OPTIONS) \n"

All I wanted from the above example was the status of variable when it is updated :

Quote:

$(C_SOURCE_FLOATING_POINT_OPTIONS)

suppose to print "-tPPCE200Z7NEF -WDDFP=G"

what else you guys were expecting with GNU make ? @computersavvy open your eyes now and see

pan64 · 08-10-2022, 12:49 AM

Quote:

Originally Posted by rpittala

Hi All,
What you guys need here ? as I have already mentioned that the below example is what I have and here it worked for me now:

Code:

C_SOURCE_FLOATING_POINT_OPTIONS=-tPPCE200Z7NEN -WDDFP=N
FLOATING_POINT_OPTIONS=-tPPCE200Z7NEF -WDDFP=G
#C_SOURCE_FLOATING_POINT_OPTIONS := $(FLOATING_POINT_OPTIONS)
CFLAGS: C_SOURCE_FLOATING_POINT_OPTIONS=$(FLOATING_POINT_OPTIONS)
hello: 
        echo"-->$(CFLAGS) ==> ==> $(C_SOURCE_FLOATING_POINT_OPTIONS) \n"

All I wanted from the above example was the status of variable when it is updated : suppose to print "-tPPCE200Z7NEF -WDDFP=G"

what else you guys were expecting with GNU make ? @computersavvy open your eyes now and see

since the value of the variable (not status) may depend on the target you build that echo can only print the actual value of it and not the value used during the compilation (which can be the same but also can be different).
So would be nice to learn how does it really work and understand (open your eyes now and see).

TB0ne · 08-10-2022, 08:16 AM

Quote:

Originally Posted by rpittala

Hi All,
What you guys need here ? as I have already mentioned that the below example is what I have and here it worked for me now:

Code:

C_SOURCE_FLOATING_POINT_OPTIONS=-tPPCE200Z7NEN -WDDFP=N
FLOATING_POINT_OPTIONS=-tPPCE200Z7NEF -WDDFP=G
#C_SOURCE_FLOATING_POINT_OPTIONS := $(FLOATING_POINT_OPTIONS)
CFLAGS: C_SOURCE_FLOATING_POINT_OPTIONS=$(FLOATING_POINT_OPTIONS)
hello: 
        echo"-->$(CFLAGS) ==> ==> $(C_SOURCE_FLOATING_POINT_OPTIONS) \n"

All I wanted from the above example was the status of variable when it is updated : suppose to print "-tPPCE200Z7NEF -WDDFP=G" what else you guys were expecting with GNU make ? @computersavvy open your eyes now and see

Seriously??? How many threads (including this one) have you been asked to provide information in??? Two pages now...you STILL don't provide the full makefile, despite being asked numerous times. Saying "I placed : (without =)" is pointless. No one coming across this thread is going to know WHY you did that, what you were trying to do, etc.

AGAIN: you have been working with makefiles for *TEN YEARS*, and asking about Clearmake/Solaris/RHEL during that time, yet don't seem to 'open your eyes' to getting told to provide full details, that Solaris is NOT the same as RHEL, and that makefiles between the two are actually going to require WORK from you to function.