diff --git a/libpkgconf/config.h.meson b/libpkgconf/config.h.meson
index 74af731..406f283 100644
--- a/libpkgconf/config.h.meson
+++ b/libpkgconf/config.h.meson
@@ -12,6 +12,18 @@
 /* Define to 1 if you have the `reallocarray' function. */
 #mesondefine HAVE_REALLOCARRAY
 
+/* Define to 1 if you have the `strlcat' function. */
+#mesondefine HAVE_DECL_STRLCAT
+
+/* Define to 1 if you have the `strlcpy' function. */
+#mesondefine HAVE_DECL_STRLCPY
+
+/* Define to 1 if you have the `strndup' function. */
+#mesondefine HAVE_DECL_STRNDUP
+
+/* Define to 1 if you have the `reallocarray' function. */
+#mesondefine HAVE_DECL_REALLOCARRAY
+
 /* Name of package */
 #mesondefine PACKAGE
 
diff --git a/meson.build b/meson.build
index a629073..0a9b9b1 100644
--- a/meson.build
+++ b/meson.build
@@ -30,8 +30,12 @@ check_functions = [
 ]
 
 foreach f : check_functions
+  name = f[0].to_upper().underscorify()
   if cc.has_function(f[0], prefix : '#define _BSD_SOURCE\n#include <@0@>'.format(f[1])) and cc.has_header_symbol(f[1], f[0], prefix : '#define _BSD_SOURCE')
-    cdata.set('HAVE_@0@'.format(f[0].to_upper().underscorify()), 1)
+    cdata.set('HAVE_@0@'.format(name), 1)
+    cdata.set('HAVE_DECL_@0@'.format(name), 1)
+  else
+    cdata.set('HAVE_DECL_@0@'.format(name), 0)
   endif
 endforeach