Related tdf#155125: add MacPorts to GPG's fallback search on macOS

Change-Id: I52a5031b531dc542b2eea72191a1c240f78820bb
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/154474
Tested-by: Jenkins
Reviewed-by: Patrick Luby <plubius@neooffice.org>

external/gpgmepp/UnpackedTarball_gpgmepp.mk

@@ -33,5 +33,6 @@ $(eval $(call gb_UnpackedTarball_add_patches,gpgmepp, \
     external/gpgmepp/configure.patch \
     external/gpgmepp/w32-include.patch \
     external/gpgmepp/Wincompatible-function-pointer-types.patch \
+    external/gpgmepp/macos-macports-path.patch \
 ))
 # vim: set noet sw=4 ts=4:

external/gpgmepp/macos-macports-path.patch

@@ -0,0 +1,11 @@
+--- src/posix-util.c	2023-04-20 07:35:50.000000000 -0400
++++ src/posix-util.c	2023-07-14 17:28:21.000000000 -0400
+@@ -145,7 +145,7 @@
+      the browser interface we should look into some additional
+      fallback paths. */
+   const char *additional_path
+-    = "/usr/local/bin:/usr/local/MacGPG2/bin:/opt/homebrew/bin";
++    = "/usr/local/bin:/usr/local/MacGPG2/bin:/opt/homebrew/bin:/opt/local/bin";
+   if (!ret)
+     {
+       ret = walk_path_str (additional_path, pgm);