>
> lines.c uses hypot(), which is found in libm on some systems. This means
> we are currently relying on getting -lm indirectly through some other
> means, as otherwise linking any binary with spice-common would fail.
>
> Signed-off-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
> ---
> m4/spice-deps.m4 | 4 ++++
> meson.build | 10 ++++++++++
> 2 files changed, 14 insertions(+)
>
> diff --git a/m4/spice-deps.m4 b/m4/spice-deps.m4
> index 7c0cca4..cf0e048 100644
> --- a/m4/spice-deps.m4
> +++ b/m4/spice-deps.m4
> @@ -64,6 +64,10 @@ AC_DEFUN([SPICE_CHECK_SYSDEPS], [
> AC_FUNC_ERROR_AT_LINE
> AC_FUNC_FORK
> AC_CHECK_FUNCS([dup2 floor inet_ntoa memmove memset pow sqrt])
> + AC_SEARCH_LIBS([hypot], [m], [], [
> + AC_MSG_ERROR([unable to find the hypot() function])
> + ])
> +
extra empty line
> ])
>
>
> diff --git a/meson.build b/meson.build
> index de777db..4dd4610 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -87,6 +87,16 @@ foreach func : functions
> endif
> endforeach
>
> +# check for hypot function
> +#
> +# Include math.h header to avoid problems with builtins.
> +# In some systems the function is in libm.
> +if not compiler.has_function('hypot', prefix : '#include <math.h>')
> + libm = compiler.find_library('m', required : false)
> + if compiler.has_function('hypot', prefix : '#include <math.h>',
> dependencies : libm)
> + spice_common_deps += libm
> + endif
> +endif
>
> #
> # check for mandatory dependencies
Otherwise,
Acked-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
Frediano
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