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Date:   Thu, 21 Dec 2017 13:51:39 +0100
From:   Linus Walleij <>
To:     Joel Stanley <>
        "" <>,
        stable <>
Subject: Re: [PATCH] tools/gpio: Fix build error with musl libc

On Thu, Dec 21, 2017 at 1:41 AM, Joel Stanley <> wrote:

> 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:
> Signed-off-by: Joel Stanley <>

Patch applied.

Linus Walleij

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