fs/io: move to separate library

To eliminate the libio.a dependency.

meson.build

@@ -425,6 +425,7 @@ subdir('src/lib/crypto')
 subdir('src/zeroconf')
 
 subdir('src/fs')
+subdir('src/fs/io')
 subdir('src/fs/glue')
 subdir('src/config')
 subdir('src/tag')

src/fs/glue/meson.build

@@ -5,6 +5,7 @@ fs_glue = static_library(
   include_directories: inc,
   dependencies: [
     fs_dep,
+    fs_io_dep,
     fmt_dep,
     log_dep,
     util_dep,

src/fs/io/meson.build

@@ -0,0 +1,18 @@
+fs_io = static_library(
+  'fs_io',
+  'TextFile.cxx',
+  include_directories: inc,
+  dependencies: [
+    fs_dep,
+    io_dep,
+    system_dep,
+    zlib_dep,
+  ],
+)
+
+fs_io_dep = declare_dependency(
+  link_with: fs_io,
+  dependencies: [
+    io_dep,
+  ],
+)

src/fs/meson.build

@@ -12,7 +12,6 @@ fs_sources = [
   'List.cxx',
   'LookupFile.cxx',
   'DirectoryReader.cxx',
-  'io/TextFile.cxx',
 ]
 
 if is_windows
@@ -26,7 +25,6 @@ fs = static_library(
   fs_sources,
   include_directories: inc,
   dependencies: [
-    zlib_dep,
     shlwapi_dep,
     system_dep,
     icu_dep,
@@ -36,6 +34,5 @@ fs = static_library(
 fs_dep = declare_dependency(
   link_with: fs,
   dependencies: [
-    io_dep,
   ],
 )

test/meson.build

@@ -177,6 +177,7 @@ if zlib_dep.found()
     include_directories: inc,
     dependencies: [
       fs_dep,
+      zlib_dep,
     ],
   )
 endif