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>

3 files changed, 27 insertions, 2 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 68c6a111691..d61fb397d25 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -2258,6 +2258,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/proot-add-clone3.patch                   \
   %D%/packages/patches/proot-add-missing-include.patch          \
   %D%/packages/patches/protobuf-fix-build-on-32bit.patch        \
+  %D%/packages/patches/protobuf-pathmax.patch                   \
   %D%/packages/patches/psm2-compile-ctor-without-avx.patch      \
   %D%/packages/patches/psm-arch.patch                           \
   %D%/packages/patches/psm-disable-memory-stats.patch           \
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>
+ 
diff --git a/gnu/packages/protobuf.scm b/gnu/packages/protobuf.scm
index 1953fe9ee0d..fdd9ad356a4 100644
--- a/gnu/packages/protobuf.scm
+++ b/gnu/packages/protobuf.scm
@@ -202,7 +202,8 @@ internal RPC protocols and file formats.")
               (sha256
                (base32
                 "01cl4l0rnnzjbhjjs2gyg2pk13505gh86ikh22jqjp54dp8mvp5x"))
-              (patches (search-patches "protobuf-fix-build-on-32bit.patch"))))
+              (patches (search-patches "protobuf-fix-build-on-32bit.patch"
+                                       "protobuf-pathmax.patch"))))
     (outputs (list "out"
                    "static"))           ; ~12 MiB of .a files
     (build-system cmake-build-system)
@@ -232,7 +233,12 @@ internal RPC protocols and file formats.")
                                "BlockSizeSmallerThanAllocation")
                 ;; See: https://github.com/protocolbuffers/protobuf/issues/8082.
                 (disable-tests "src/google/protobuf/io/zero_copy_stream_unittest.cc"
-                               "LargeOutput"))))
+                               "LargeOutput")
+                ;; setsockopt SO_RCVTIMEO is unsupported
+                #$@(if (target-hurd?)
+                       #~((disable-tests "src/google/protobuf/io/zero_copy_stream_unittest.cc"
+                                         "BlockingFileIoWithTimeout"))
+                       #~()))))
           (add-before 'configure 'set-c++-standard
             (lambda _
               (substitute* "CMakeLists.txt"