build: link libm explicitly

In the future libweston will stop providing it for its users, since it's not
part of libweston API.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

desktop-shell/meson.build

@@ -11,6 +11,7 @@ if get_option('shell-desktop')
 		input_method_unstable_v1_protocol_c,
 	]
 	deps_shell_desktop = [
+		dep_libm,
 		dep_libshared,
 		dep_lib_desktop,
 		dep_libweston_public,

ivi-shell/meson.build

@@ -12,7 +12,11 @@ if get_option('shell-ivi')
 		'ivi-shell',
 		srcs_shell_ivi,
 		include_directories: common_inc,
-		dependencies: [ dep_lib_desktop, dep_libweston_public ],
+		dependencies: [
+			dep_libm,
+			dep_lib_desktop,
+			dep_libweston_public
+		],
 		name_prefix: '',
 		install: true,
 		install_dir: dir_module_weston

libweston/renderer-gl/meson.build

@@ -12,6 +12,7 @@ srcs_renderer_gl = [
 ]
 
 deps_renderer_gl = [
+	dep_libm,
 	dep_pixman,
 	dep_libweston_private,
 	dep_libdrm_headers,