Apply postgresql-17.4-ldflags_sl_v2.patch

Author: hackorum

meson.build

@@ -130,7 +130,7 @@ cxxflags_mod = []
 
 ldflags = []
 ldflags_be = []
-ldflags_sl = []
+ldflags_sl = get_option('ldflags_sl')
 ldflags_mod = []
 
 test_c_args = []

meson_options.txt

@@ -70,6 +70,8 @@ option('darwin_sysroot', type: 'string', value: '',
 option('rpath', type: 'boolean', value: true,
   description: 'Embed shared library search path in executables')
 
+option('ldflags_sl', type: 'array', value: [],
+  description: 'Extra linker flags for linking shared libraries only')
 
 # External dependencies