Fix a bunch of missing meson boilerplate

These other libraries need this too

(cherry picked from commit ffdce51)

Author: Ericson2314

src/libcmd/meson.build

@@ -113,10 +113,15 @@ headers = [config_h] + files(
   'repl.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixcmd',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )

src/libexpr/meson.build

@@ -187,13 +187,18 @@ headers = [config_h] + files(
 
 subdir('primops')
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixexpr',
   sources,
   parser_tab,
   lexer_tab,
   generated_headers,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )

src/libfetchers/meson.build

@@ -76,10 +76,15 @@ headers = files(
   'tarball.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixfetchers',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )

src/libflake/meson.build

@@ -58,10 +58,15 @@ headers = files(
   'flake/url-name.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixflake',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )

src/libmain/meson.build

@@ -82,10 +82,15 @@ headers = [config_h] + files(
   'shared.hh',
 )
 
+subdir('nix-meson-build-support/export-all-symbols')
+subdir('nix-meson-build-support/windows-version')
+
 this_library = library(
   'nixmain',
   sources,
   dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
 )