The GPIO tools build fails when using a buildroot toolchain that uses musl as it's C library:

arm-broomstick-linux-musleabi-gcc -Wp,-MD,./.gpio-event-mon.o.d \ -Wp,-MT,gpio-event-mon.o -O2 -Wall -g -D_GNU_SOURCE \ -Iinclude -D"BUILD_STR(s)=#s" -c -o gpio-event-mon.o gpio-event-mon.c gpio-event-mon.c:30:6: error: unknown type name ‘u_int32_t’; did you mean ‘uint32_t’? u_int32_t handleflags, ^~~~~~~~~ uint32_t

The glibc headers installed on my laptop include sys/types.h in unistd.h, but it appears that musl does not.

Fixes: 97f69747d8b1 ("tools/gpio: add the gpio-event-mon tool") Cc: stable@vger.kernel.org Signed-off-by: Joel Stanley joel@jms.id.au --- tools/gpio/gpio-event-mon.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/tools/gpio/gpio-event-mon.c b/tools/gpio/gpio-event-mon.c index 1c14c2595158..4b36323ea64b 100644 --- a/tools/gpio/gpio-event-mon.c +++ b/tools/gpio/gpio-event-mon.c @@ -23,6 +23,7 @@ #include <getopt.h> #include <inttypes.h> #include <sys/ioctl.h> +#include <sys/types.h> #include <linux/gpio.h>

int monitor_device(const char *device_name,