build: Re-add support for the legacy perl api

This was accidentally left behind, expose it beind an option as
with the old build system but default to false now. Enough time
has passed and only distros that care about it can enable it.

2 files changed, 14 insertions, 6 deletions

diff --git a/meson_options.txt b/meson_options.txt
index 9b5d620b..eee21791 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -60,3 +60,6 @@ option('with-winamp', type: 'boolean',
 option('install-plugin-metainfo', type: 'boolean', value: false,
   description: 'Installs metainfo files for enabled plugins, useful when distros create split packages'
 )
+option('with-perl-legacy-api', type: 'boolean', value: false,
+  description: 'Enables the legacy IRC perl module for compatibility with old scripts'
+)
diff --git a/plugins/perl/meson.build b/plugins/perl/meson.build
index 5e5d6d71..180797ee 100644
--- a/plugins/perl/meson.build
+++ b/plugins/perl/meson.build
@@ -13,11 +13,17 @@ hexchat_perl_module = custom_target('hexchat-perl-header',
   command: [generate_perl_header, '@OUTPUT@', '@INPUT@']
 )
 
-irc_perl_module = custom_target('irc-perl-header',
-  input: 'lib/IRC.pm',
-  output: 'irc.pm.h',
-  command: [generate_perl_header, '@OUTPUT@', '@INPUT@']
-)
+perl_cflags = []
+irc_perl_module = []
+
+if get_option('with-perl-legacy-api')
+  irc_perl_module = custom_target('irc-perl-header',
+    input: 'lib/IRC.pm',
+    output: 'irc.pm.h',
+    command: [generate_perl_header, '@OUTPUT@', '@INPUT@']
+  )
+  perl_cflags += '-DOLD_PERL'
+endif
 
 perl = find_program('perl')
 
@@ -25,7 +31,6 @@ ret = run_command([perl, '-MExtUtils::Embed', '-e', 'ccopts'])
 if ret.returncode() != 0
   error('perl: Failed to get cflags')
 endif
-perl_cflags = []
 foreach flag : ret.stdout().strip().split(' ')
   if flag.startswith('-I') or flag.startswith('-D')
     perl_cflags += flag