[Kdenlive-devel] FFT problem: error: expected expression before ‘/’ token

[Simon Eugster]

2010/11/15 Dan Dennedy <dan at dennedy.org>:
> On Mon, Nov 15, 2010 at 2:52 AM, jb <jb at kdenlive.org> wrote:
>> On Monday 15 November 2010 10.06:23 Simon Eugster wrote:
>>> Good morning,
>>
>>> /data/cworkspace/kdenlive.git/kdenlive/src/kiss_fft/kiss_fft.c:393:
>>> error: expected expression before ‘/’ token
>>> make[2]: *** [src/cmake_bindir/CMakeFiles/kdenlive.dir/kiss_fft/kiss_fft.o]
>>> Fehler 1
>>>
>>> Any hint?
>>
>> Yes. C code does not accept comments starting with //
>> You must use /* ... */ for your comments.

Man. I really didn't know that.

> I use // style comments in my C code all the time except public
> headers for portability. Of course, I am referring to C99. Obviously,
> he does not want to have to modify all of this existing code he is
> reusing, so it must come down to a compiler flag. Is somebody adding
> '-ansi' ?

I just tried to add the --std=c99 flag in CMakeLists.txt, but
somewhere these flags are set:
> Cflags: -Wno-long-long -std=iso9899:1990 -Wundef -Wcast-align -Werror-implicit-function-declaration -Wchar-subscripts -Wall -W -Wpointer-arith -Wwrite-strings -Wformat-security -Wmissing-format-attribute -fno-common
(added «message(C flags: ${CMAKE_C_FLAGS})» at the end of
CMakeLists.txt to display them.)
-ansi is not used (at least git grep did not find it); how could I
switch to C99? (Or is there any drawback in doing so?)

Simon