Hi Paul, 1. - Kernel - 2.6.31 - gcc - 4.9.4 - glibc - 2.19 2. please refer to the attached log file. 3. I am facing this issue in the latest version tzdb-2023c. 4. i used the -DPORT_TO_C89 option in CFLAGS also the same error occurred. I also attached the error log also. Thanks, Naveen. On Wed, May 31, 2023 at 3:48 AM Paul Eggert <eggert@cs.ucla.edu> wrote:

On 5/30/23 00:57, Naveen kumar via tz wrote:

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I am facing this issue while compiling the tzdata latest version tzdb-2023c.I attached the log for your reference.

Thanks for reporting the problem.

What compiler and compiler version are you using? For example, if you're using GCC, what is the output of the 'gcc --version' command?

What options are you giving the compiler?

Is the problem new to tzdb-2023c, or do you see it with earlier versions of tzdb?

Does the problem go away if you compile with the -DPORT_TO_C89 compiler option? E.g.,

make CFLAGS='-DPORT_TO_C89'

The PORT_TO_C89 flag is documented in the Makefile.

On May 31, 2023, at 12:30 AM, Naveen kumar via tz <tz@iana.org> wrote:

• gcc - 4.9.4

...

i used the -DPORT_TO_C89 option in CFLAGS also the same error occurred. I also attached the error log also.

private.h does #if (__STDC_VERSION__ < 199901 && !defined restrict \ && (PORT_TO_C89 || defined _MSC_VER)) # define restrict /* empty */ #endif before it uses the new-in-c99 "restrict" keyword. I was able to build on Ubuntu 14.10 with GCC 4.9.1 by adding -DPORT_TO_C89 to the end of the "CFLAGS=" line in Makefile before running make; it didn't build unless I did that, as GCC 4.9.1 didn't recognize "restrict" as a keyword. Did you add -DPORT_TO_C89 to the end of the "CFLAGS=" line in Makefile before running make? If not, in what fashion did you use the -DPORT_TO_C89 option in CFLAGS?

Hi , I added the -std=gnu11 options also it's shows same error. On Thu, 1 Jun, 2023, 5:38 am Paul Eggert, <eggert@cs.ucla.edu> wrote:

On 2023-05-31 13:14, Guy Harris via tz wrote:

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I was able to build on Ubuntu 14.10 with GCC 4.9.1 by adding -DPORT_TO_C89 to the end of the "CFLAGS=" line in Makefile before running make; it didn't build unless I did that, as GCC 4.9.1 didn't recognize "restrict" as a keyword.

<https://gcc.gnu.org/c99status.html> says the 'restrict' keyword is supported by GCC 2.95 (1999) and later. GCC 4 and earlier, though, need an option like '-std=gnu11' to enable 'restrict', as these GCC versions default to C89 and 'restrict' is incompatible with C89.

Come to think of it, it's probably better to use -std=gnu11 than -DPORT_TO_C89 on Naveen's platform. Something like this, say:

make -j6 zic=zic cc=arm-linux-gnueabi-gcc \ ZDUMPDIR=/usr/sbin ZFLAGS="-b slim" \ CFLAGS="-std=gnu11 -Os -g -pipe"

I installed the attached commentary patch into TZDB, to try to help others in Naveen's shoes.

Hi Team, Now it's working fine with c11 standard. Thanks & Regards, Naveen. On Thu, 1 Jun, 2023, 2:25 pm Guy Harris, <gharris@sonic.net> wrote:

On Jun 1, 2023, at 1:12 AM, Naveen kumar <navinagaraj18@gmail.com> wrote:

...

I added the -std=gnu11 options also it's shows same error.

So you added it to the CFLAGS= line in the Makefile and it still complains about "restrict"? If so, what happens if you add "-std=gnu99" instead?

Or you ran

make CFLAGS="-std=gnu11" ...

and it still complains about "restrict"? If so, what happens if you use "-std=gnu99" instead?