topic Option '-TC' in Intel® oneAPI DPC++/C++ Compiler

Option '-TC'

GisleVanem — Sat, 25 Dec 2021 13:32:50 GMT

Just installed Intel's oneAPI and it's compiler dpcpp.exe.

Trying it to compile a C-project of mine seems impossible w/o a major rewrite.

Seems to me it only supports C++ even when using "dpcpp -TC ...". Rather disappointing.

Many warnings on stuff like "char *p = malloc (len);" causing

error: cannot initialize a variable of type 'char *' with an rvalue of type 'void *'

So what's the option "-TC" really for?

Edit: Switching to icx.exe did the trick.

Re:Option '-TC'

DitiD_Intel — Mon, 27 Dec 2021 10:45:17 GMT

Hi,

Thank you for posting in Intel Communities.

>> So what's the option "-TC" really for?

This option tells the compiler to process all source or unrecognized file types as C source files.

For more information, please refer to the link mentioned below.

https://www.intel.com/content/www/us/en/develop/documentation/oneapi-dpcpp-cpp-compiler-dev-guide-and-reference/top/compiler-reference/compiler-options/compiler-option-details/miscellaneous-options/tc-1.html

Could you please provide us with a sample reproducer along with the compiler version being used so that we can investigate your issue from our end.

Thanks and Regards,

Ditipriya.

Re: Re:Option '-TC'

GisleVanem — Mon, 27 Dec 2021 18:49:50 GMT

> Could you please provide us with a sample reproducer along with the compiler version being used so that we can investigate your issue from our end.

Here is a simple example GNU-makefile (called dpcpp-test.mak) or attached:

------------- 8< --- 8< -----------

CFLAGS = -MD -TC

all: dpcpp-test.exe

dpcpp-test.exe: dpcpp-test.obj
xilink -out:dpcpp-test.exe $<

dpcpp-test.obj: dpcpp-test.c
dpcpp $(CFLAGS) -Fo$@ $<

dpcpp-test.c: dpcpp-test.mak
$(info Generating $@)
$(file > $@,$(dpcpp-test_C))

define dpcpp-test_C
//
// Generated file. DO NOT EDIT!
//
#include <stdio.h>
#include <stdlib.h>
int main (void)
{
char *p = malloc(1000);

printf ("p: 0x%p\n", p);
p ? free(p) : ((void)0);
return (0);
}
endef

------------- 8< --- 8< -----------

Issuing make -f dpcpp-test.mak, gives:

Generating dpcpp-test.c
dpcpp -MD -TC -Fodpcpp-test.obj dpcpp-test.c
dpcpp-test.c(8,11): error: cannot initialize a variable of type 'char *' with an rvalue of type 'void *'
char *p = malloc(1000);
^ ~~~~~~~~~~~~
1 error generated.

Enough said.

Re:Option '-TC'

DitiD_Intel — Thu, 06 Jan 2022 09:30:23 GMT

Hi,

DPC++ will support only c++ code from c++ 17 and onwards. Hence -TC option does not work.

It is working with icx and icx in windows works for both c as well as c++ code. So, it is behaving correctly.

Thanks and Regards,

Ditipriya.

Re: Option '-TC'

GisleVanem — Thu, 06 Jan 2022 09:59:26 GMT

> Hence -TC option does not work.

A dpcpp -? lists it as an valid option. Time to clean-up this options mess?

Re: Option '-TC'

DitiD_Intel — Mon, 10 Jan 2022 10:05:33 GMT

Hi,

Could you please confirm the OS you're using?

For windows, /TC is a valid option, however for linux, -TC is not listed as a valid option.

Thanks and Regards,

Ditipriya.

Re:Option '-TC'

DitiD_Intel — Mon, 17 Jan 2022 11:14:23 GMT

Hi,

We've not heard back from you. Can you please provide an update?

Thanks and Regards,

Ditipriya.

Re:Option '-TC'

DitiD_Intel — Fri, 21 Jan 2022 05:17:31 GMT

Hi,

We have not heard back from you. This thread will no longer be monitored by Intel. If you need further assistance, please post a new question.

Thanks & Regards,

Ditipriya.