sudo make V=1
gcc -I. -I./ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -I./compat/float -I./compat/atomics/gcc -DZLIB_CONST -DHAVE_AV_CONFIG_H -std=c11 -fomit-frame-pointer -pthread -D_REENTRANT -I/usr/include/SDL2  -g -Wdeclaration-after-statement -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto -Wno-maybe-uninitialized  -MMD -MF libavdevice/alldevices.d -MT libavdevice/alldevices.o -c -o libavdevice/alldevices.o libavdevice/alldevices.c
In file included from /usr/include/math.h:46:0,
                 from ./libavutil/common.h:36,
                 from ./libavutil/avutil.h:296,
                 from ./libavutil/log.h:25,
                 from libavdevice/avdevice.h:48,
                 from libavdevice/alldevices.c:23:
/usr/include/bits/mathdef.h:28:1: error: expected ‘,’ or ‘;’ before ‘typedef’
 typedef float float_t;  /* `float' expressions are evaluated as `float'.  */
 ^
make: *** [libavdevice/alldevices.o] Error 1