meson: implement perl bindings

Change-Id: Ie1bfb0aa784e6136a82d518a652d0ae60c4b047a

1 files changed, 69 insertions, 0 deletions

diff --git a/perl/meson.build b/perl/meson.build
new file mode 100644
index 000000000..75c7c2c79
--- /dev/null
+++ b/perl/meson.build
@@ -0,0 +1,69 @@
+project('lix-perl', 'cpp',
+  version : run_command('bash', '-c', 'echo -n $(cat ../.version)$VERSION_SUFFIX', check : true).stdout().strip(),
+  default_options : [
+    'cpp_std=c++2a',
+    # TODO(Qyriad): increase the warning level
+    'debug=true',
+    # FIXME(Qyriad): should this be -O2? The main nix build was switched to -O2 in 3c5234430
+    'optimization=3',
+  ],
+)
+
+fs = import('fs')
+
+prefix = get_option('prefix')
+libdir = get_option('libdir')
+if not fs.is_absolute(libdir)
+  libdir = prefix / libdir
+endif
+
+cxx = meson.get_compiler('cpp')
+
+# Really version 5.8.0, but Perl's version string is of the form
+# "This is perl 5, version 38, subversion 2", for 5.38.2, so as far
+# as Meson is concerned, the version of Perl we need is 8 or greater.
+perl = find_program('perl', version : '>=8')
+
+# "compiler to convert Perl XS code into C code"
+xsubpp = find_program('xsubpp')
+
+perl_version = run_command(
+  perl,
+  '-e',
+  'use Config; print $Config{version};',
+  capture : true,
+  check : true,
+).stdout()
+perl_arch_name = run_command(
+  perl,
+  '-e',
+  'use Config; print $Config{archname};',
+  capture : true,
+  check : true,
+).stdout()
+
+perl_libdir = f'@libdir@/perl5/site_perl/@perl_version@/@perl_arch_name@'
+
+perl_incdir = run_command(
+  perl,
+  '-e',
+  'use Config; print $Config{archlibexp};',
+  capture : true,
+  check : true,
+).stdout() + '/CORE'
+
+perl_include = declare_dependency(
+  # This must have is_system : true, or #include "config.h" will get perl's config.h
+  # instead of Nix's.
+  include_directories : include_directories(perl_incdir, is_system : true),
+)
+
+sodium = dependency('libsodium', 'sodium', required : true)
+
+if cxx.get_linker_id() in ['ld.bfd', 'ld.gold']
+  add_project_link_arguments('-Wl,--no-copy-dt-needed-entries', language : 'cpp')
+endif
+
+libstore = dependency('nixstore', 'nix-store', required : true)
+
+subdir('lib/Nix')