ffmpeg-full opencv

BEGIN /tmp/ffconf.zrt1FZ48/test.c
    1   #include <opencv2/core/core_c.h>
    2   #include <stdint.h>
    3   long check_cvCreateImageHeader(void) { return (long) cvCreateImageHeader; }
    4   int main(void) { int ret = 0;
    5    ret |= ((intptr_t)check_cvCreateImageHeader) & 0xFFFF;
    6   return ret; }
END /tmp/ffconf.zrt1FZ48/test.c
gcc -D_FORTIFY_SOURCE=2 -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -I>
In file included from /usr/include/opencv2/core/types_c.h:59:0,
                 from /usr/include/opencv2/core/core_c.h:48,
                 from /tmp/ffconf.zrt1FZ48/test.c:1:
/usr/include/opencv2/core/cvdef.h:485:1: error: unknown type name 'namespace'
 namespace cv {
 ^~~~~~~~~
/usr/include/opencv2/core/cvdef.h:485:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
 namespace cv {
              ^
ERROR: opencv not found