meson: gate losetup on LINUX

This tool uses Linux-specific API, encode this in the build system.
Also the parts of libcommon providing loopback handling are gated
behind LINUX.

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>

diff --git a/meson.build b/meson.build
index 59e1608c376ce9858f913907715886388feeff6f..4ee9cd6aa0e853f0eafbeaca1ee74cf31a5908de 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -1864,7 +1864,9 @@ if opt and not is_disabler(exe)
   bashcompletions += ['eject']
 endif
 
-opt = get_option('build-losetup').allowed()
+opt = get_option('build-losetup') \
+      .require(LINUX) \
+      .allowed()
 exe = executable(
   'losetup',
   losetup_sources,