meson: bump minimal dependency version up to 0.60.0 for list.<plus>

The expression was newly available at meson build 0.60.0 version.

Signed-off-by: Takashi Sakamoto <[email protected]>

README.rst

@@ -50,7 +50,7 @@ Dependencies
 Requirements to build
 =====================
 
-- Meson 0.56.0 or later
+- Meson 0.60.0 or later
 - Ninja
 - PyGObject (optional to run unit tests)
 - gi-docgen (optional to generate API documentation)

meson.build

@@ -1,16 +1,16 @@
 project('libhinawa', 'c',
   version: '2.6.1',
   license: 'LGPL-2.1+',
-  meson_version: '>= 0.56.0',
+  meson_version: '>= 0.60.0',
 )
 
 # Detect support level in Linux sound subsystem.
 cc = meson.get_compiler('c')
 
-header_dirs = []
+backport_header_dir = []
 if not cc.has_header_symbol('include/linux/firewire-cdev.h', 'FW_CDEV_EVENT_REQUEST3')
   # Use backport header from Linux kernel v5.16 prepatch.
-  header_dirs += include_directories('include')
+  backport_header_dir += include_directories('include')
 endif
 
 # For g-i and documentation.

src/meson.build

@@ -51,14 +51,12 @@ enums = gnome.mkenums_simple('hinawa_enums',
 mapfile = 'hinawa.map'
 vflag = '-Wl,--version-script,' + join_paths(meson.current_source_dir(), mapfile)
 
-header_dirs += include_directories('.')
-
 myself = library('hinawa',
   sources: sources + headers + privates + marshallers + enums,
   version: meson.project_version(),
   soversion: meson.project_version().split('.')[0],
   install: true,
-  include_directories: header_dirs,
+  include_directories: backport_header_dir + include_directories('.'),
   dependencies: dependencies,
   link_args : vflag,
   link_depends : mapfile,