Compiling error for the Week0 Hello World Example

[adricortes]

There is an incompatibility between using "struct timespec" in the GNU compiler with the -std=c99 option (Linux OS). The compiler complains that

FLA_Clock.c: In function ‘FLA_Clock_helper’:
FLA_Clock.c:41:21: error: storage size of ‘ts’ isn’t known
struct timespec ts;

A quick fix that worked is using -std=gnu99 instead.

[rvdg]

Andriano, Thank you. I will put a note in the notes. Robert

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On Apr 13, 2019, at 4:17 AM, Adriano Cortes ***@***.***> wrote: There is an incompatibility between using "struct timespec" in the GNU compiler with the -std=c99 option (Linux OS). The compiler complains that FLA_Clock.c: In function ‘FLA_Clock_helper’: FLA_Clock.c:41:21: error: storage size of ‘ts’ isn’t known struct timespec ts; A quick fix that worked is using -std=gnu99 instead.

[rvdg]

Adriano, Can you do me a favor. Can you see what happens if the -std=c99 option is simply removed? (I don’t think specifying it for our course material is particularly important.) Thanks Robert

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On Apr 13, 2019, at 4:17 AM, Adriano Cortes ***@***.***> wrote: There is an incompatibility between using "struct timespec" in the GNU compiler with the -std=c99 option (Linux OS). The compiler complains that FLA_Clock.c: In function ‘FLA_Clock_helper’: FLA_Clock.c:41:21: error: storage size of ‘ts’ isn’t known struct timespec ts; A quick fix that worked is using -std=gnu99 instead. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFa8J4p5ZswTITm3_EvTrxEup2m8slvyks5vgT43gaJpZM4ctypb>.

[adricortes]

Robert,

It compiled fine removing -std=c99.
My GCC is the newest version (8.3), and according to the man page by default it uses the -std=gnu17 ("GNU dialect of ISO C17. This is the default for C code"). I found an explanation of the compiling error here https://gcc-help.gcc.gnu.narkive.com/8xCaKI6r/problem-with-struct-timespec-and-c99-standard
Following it I put #define _POSIX_C_SOURCE 199309L in the beginning of FLA_Clock.c and it worked fine with the -std=c99 options.

Best.
Adriano.

[rvdg]

Thank you very much. I am copying Field, who can insert this into libflame as well, if appropriate. We appreciate the feedback.

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On Apr 13, 2019, at 11:26 PM, Adriano Cortes ***@***.***> wrote: Robert, It compiled fine removing -std=c99. My GCC is the newest version (8.3), and according to the man page by default it uses the -std=gnu17 ("GNU dialect of ISO C17. This is the default for C code"). I found an explanation of the compiling error here https://gcc-help.gcc.gnu.narkive.com/8xCaKI6r/problem-with-struct-timespec-and-c99-standard <https://gcc-help.gcc.gnu.narkive.com/8xCaKI6r/problem-with-struct-timespec-and-c99-standard> Following it I put #define _POSIX_C_SOURCE 199309L in the beginning of FLA_Clock.c and it worked fine with the -std=c99 options. Best. Adriano. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFa8JwdqU3_Ysc_p1lZnhs9LaJDur9mMks5vgkuXgaJpZM4ctypb>.