gnu: protobuf: Fix build on the Hurd.

* gnu/packages/patches/protobuf-pathmax.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/protobuf.scm (protobuf)[source]<patches>: Use it.
  [arguments]<#:phases>: Skip a test needing unimplemented libc options.

Merges: https://codeberg.org/guix/guix/pulls/8675
Signed-off-by: Nguyễn Gia Phong <cnx@loang.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/gnu/packages/patches/protobuf-pathmax.patch b/gnu/packages/patches/protobuf-pathmax.patch
new file mode 100644
index 00000000000..bad41105391
--- /dev/null
+++ b/gnu/packages/patches/protobuf-pathmax.patch
@@ -0,0 +1,18 @@
+Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=835267
+Bug-Upstream: https://github.com/google/protobuf/issues/2000
+Description: Add support for GNU/Hurd which doesn't define PATH_MAX.
+Author: Bas Couwenberg <sebastic@debian.org>
+Last-Update: 2022-03-11
+
+--- protobuf-3.9.1.orig/src/google/protobuf/compiler/command_line_interface.cc
++++ protobuf-3.9.1/src/google/protobuf/compiler/command_line_interface.cc
+@@ -58,6 +58,9 @@
+ #include <iostream>
+ 
+ #include <limits.h>  // For PATH_MAX
++#if defined(__GNU__)
++#define PATH_MAX 4096
++#endif
+ 
+ #include <memory>
+