gnu: mariadb: Fix building on riscv64-linux.

* gnu/packages/databases.scm (mariadb)[arguments]: Add a phase when
building for riscv64-linux to apply a patch.
[native-inputs]: When building for riscv64-linux add patch and a patch
file.
* gnu/packages/patches/mariadb-rocksdb-atomic-linking.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.

gnu/local.mk

@@ -1544,6 +1544,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/lvm2-static-link.patch			\
   %D%/packages/patches/mailutils-variable-lookup.patch		\
   %D%/packages/patches/make-impure-dirs.patch			\
+  %D%/packages/patches/mariadb-rocksdb-atomic-linking.patch	\
   %D%/packages/patches/mathjax-disable-webpack.patch			\
   %D%/packages/patches/mathjax-no-a11y.patch			\
   %D%/packages/patches/mathjax-3.1.2-no-a11y.patch		\

gnu/packages/databases.scm

@@ -10,7 +10,7 @@
 ;;; Copyright © 2015 Eric Dvorsak <eric@dvorsak.fr>
 ;;; Copyright © 2016, 2022 Hartmut Goebel <h.goebel@crazy-compilers.com>
 ;;; Copyright © 2016 Christine Lemmer-Webber <cwebber@dustycloud.org>
-;;; Copyright © 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2015-2023 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016, 2017 Nikita <nikita@n0.is>
 ;;; Copyright © 2016, 2017, 2018 Roel Janssen <roel@gnu.org>
 ;;; Copyright © 2016 David Craven <david@craven.ch>
@@ -968,6 +968,14 @@ (define-public mariadb
        #:parallel-tests? ,(target-x86-64?)
        #:phases
        (modify-phases %standard-phases
+         ;; TODO: Move this patch to the source field.
+         ,@(if (target-riscv64?)
+             `((add-after 'unpack 'patch-source
+                 (lambda* (#:key inputs native-inputs #:allow-other-keys)
+                   (invoke "patch" "-p1" "--force" "--input"
+                           (assoc-ref (or native-inputs inputs)
+                                      "patch-file")))))
+             '())
          (add-after 'unpack 'adjust-output-references
            (lambda _
              ;; The build system invariably prepends $CMAKE_INSTALL_PREFIX
@@ -1103,7 +1111,12 @@ (define-public mariadb
                 (("-lssl -lcrypto" all)
                  (string-append "-L" openssl " " all)))))))))
     (native-inputs
-     (list bison perl))
+     `(,@(if (target-riscv64?)
+           `(("patch" ,patch)
+             ("patch-file" ,(search-patch "mariadb-rocksdb-atomic-linking.patch")))
+           `())
+        ("bison" ,bison)
+        ("perl" ,perl)))
     (inputs
      (list fmt
            jemalloc

gnu/packages/patches/mariadb-rocksdb-atomic-linking.patch

@@ -0,0 +1,54 @@
+https://github.com/MariaDB/server/pull/2477
+https://github.com/MariaDB/server/commit/195c0e81493c41f1d20b91a5bcc6aaaf4979d781.patch
+
+From 195c0e81493c41f1d20b91a5bcc6aaaf4979d781 Mon Sep 17 00:00:00 2001
+From: Daniel Black <daniel@mariadb.org>
+Date: Fri, 3 Feb 2023 11:51:20 +1100
+Subject: [PATCH] MDEV-30554 RockDB libatomic linking on riscv64
+
+The existing storage/rocksdb/CMakeCache.txt defined
+ATOMIC_EXTRA_LIBS when atomics where required. This was
+determined by the toplevel configure.cmake test
+(HAVE_GCC_C11_ATOMICS_WITH_LIBATOMIC).
+
+As build_rocksdb.cmake is included after ATOMIC_EXTRA_LIBS
+was set, we just need to use it. As such no riscv64
+specific macro is needed in build_rocksdb.cmake.
+
+As highlighted by Gianfranco Costamagna (@LocutusOfBorg)
+in #2472 overwriting SYSTEM_LIBS was problematic.
+This is corrected in case in future SYSTEM_LIBS is changed
+elsewhere.
+
+Closes #2472.
+---
+ storage/rocksdb/build_rocksdb.cmake | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/storage/rocksdb/build_rocksdb.cmake b/storage/rocksdb/build_rocksdb.cmake
+index e23862ee65901..647e51e2f90d9 100644
+--- a/storage/rocksdb/build_rocksdb.cmake
++++ b/storage/rocksdb/build_rocksdb.cmake
+@@ -129,10 +129,6 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64")
+   ADD_DEFINITIONS(-DHAVE_POWER8 -DHAS_ALTIVEC)
+ endif(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64")
+ 
+-if(CMAKE_SYSTEM_PROCESSOR STREQUAL "riscv64")
+- set(SYSTEM_LIBS ${SYSTEM_LIBS} -latomic)
+-endif()
+-
+ option(WITH_FALLOCATE "build with fallocate" ON)
+ 
+ if(WITH_FALLOCATE AND UNIX)
+@@ -161,9 +157,9 @@ include_directories(SYSTEM ${ROCKSDB_SOURCE_DIR}/third-party/gtest-1.7.0/fused-s
+ 
+ find_package(Threads REQUIRED)
+ if(WIN32)
+-  set(SYSTEM_LIBS ${SYSTEM_LIBS} Shlwapi.lib Rpcrt4.lib)
++  set(SYSTEM_LIBS ${SYSTEM_LIBS} ${ATOMIC_EXTRA_LIBS} Shlwapi.lib Rpcrt4.lib)
+ else()
+-  set(SYSTEM_LIBS ${CMAKE_THREAD_LIBS_INIT} ${LIBRT} ${CMAKE_DL_LIBS})
++  set(SYSTEM_LIBS ${SYSTEM_LIBS} ${CMAKE_THREAD_LIBS_INIT} ${LIBRT} ${CMAKE_DL_LIBS} ${ATOMIC_EXTRA_LIBS})
+ endif()
+ 
+ set(ROCKSDB_LIBS rocksdblib})