[Mingw-users] aggregate `flock ret' has incomplete type

[Felix N. <fel...@sm...>]

hello,

I have a simple C++ program which compiles fine under Linux,
but gives the following error on MingGW32:

$ mingw32-make entropy.o
g++ -DNR=0 -O3 -Winline --param large-function-growth=10000 --param max-inline-insns-single=10000 --param inline-unit-growth=10000 -Wno-deprecated   -c entropy.cpp
In file included from entropy.cpp:6:
convolution.h: In function `flock* file_lock(short int, short int)':
convolution.h:84: error: aggregate `flock ret' has incomplete type and cannot be defined
convolution.h: In function `void init_fftw()':
convolution.h:100: error: `F_SETLKW' was not declared in this scope
convolution.h:100: error: `F_RDLCK' was not declared in this scope
convolution.h:100: error: `fcntl' was not declared in this scope
convolution.h: In function `void save_fftw()':
convolution.h:116: error: `F_SETLKW' was not declared in this scope
convolution.h:116: error: `F_WRLCK' was not declared in this scope
convolution.h:116: error: `fcntl' was not declared in this scope
mingw32-make: *** [entropy.o] Error 1

But <fcntl.h> seems to be included.
convolution.h is attached (it's open source).

Thanks in Advance!
-- 
Felix Natter