Hi,

results with these two options are attached.

Greetings Jonatan

Am Samstag, den 06.03.2021, 19:55 +0100 schrieb Jonatan Schlag:
> Signed-off-by: Jonatan Schlag <jonatan.schlag(a)ipfire.org>
> ---
>  Makefile.am  |  3 ++-
>  configure.ac | 26 ++++++++++++++++++++++++++
>  2 files changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile.am b/Makefile.am
> index 0c2f78c..7782354 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -19,11 +19,12 @@ AM_CPPFLAGS = \
>  	-I${top_srcdir}/src
>  
>  AM_CFLAGS = ${warn_CFLAGS} \
> +	${asan_CFLAGS} \
>  	${my_CFLAGS} \
>  	-ffunction-sections \
>  	-fdata-sections
>  
> -AM_LDFLAGS =
> +AM_LDFLAGS = ${asan_LDFLAGS}
>  
>  # leaving a space here to work around automake's conditionals
>   ifeq ($(OS),Darwin)
> diff --git a/configure.ac b/configure.ac
> index dd1ca64..6a4ee0c 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -104,6 +104,32 @@ AS_IF([test "x$more_warnings" = "xyes"],[
>  
>  AC_SUBST([warn_CFLAGS])
>  
> +# - asan ---------------------------------------------------------
> --------------
> +
> +asan_CFLAGS=""
> +asan_LDFLAGS=""
> +
> +AC_ARG_ENABLE([asan],
> +        AS_HELP_STRING([--enable-asan], [enable the address
> sanitizer @<:@default=disabled@:>@]),
> +        [asan=yes], [asan=no])
> +AS_IF([test "x$asan" = "xyes"],[
> +	asan_CFLAGS+="\
> +	-g \
> +	-fsanitize=address \
> +	-fno-omit-frame-pointer \
> +	-fsanitize-recover=address \
> +	"
> +
> +	asan_LDFLAGS+="\
> +	-fsanitize=address \
> +	"
> +])
> +
> +AC_SUBST([asan_CFLAGS])
> +AC_SUBST([asan_LDFLAGS])
> +
> +# ------------------------------------------------------------------
> ------------
> +
>  my_CFLAGS="\
>  -Wall \
>  -Wchar-subscripts \