gnu: Add aws-checksums.

* gnu/packages/c.scm (aws-checksums): New variable.
* gnu/packages/patches/aws-checksums-cmake-prefix.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/local.mk

@@ -823,6 +823,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/avogadro-python-eigen-lib.patch		\
   %D%/packages/patches/avidemux-install-to-lib.patch		\
   %D%/packages/patches/awesome-reproducible-png.patch		\
+  %D%/packages/patches/aws-checksums-cmake-prefix.patch		\
   %D%/packages/patches/azr3.patch				\
   %D%/packages/patches/bash-reproducible-linux-pgrp-pipe.patch	\
   %D%/packages/patches/bash-completion-directories.patch	\

gnu/packages/c.scm

@@ -36,6 +36,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system trivial)
+  #:use-module (gnu packages)
   #:use-module (gnu packages bootstrap)
   #:use-module (gnu packages bison)
   #:use-module (gnu packages check)
@@ -559,3 +560,27 @@ portability.")
  structures, and error handling for the @acronym{AWS,Amazon Web Services} SDK.")
     (home-page "https://github.com/awslabs/aws-c-common")
     (license license:asl2.0)))
+
+(define-public aws-checksums
+  (package
+    (name "aws-checksums")
+    (version "0.1.10")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url (string-append "https://github.com/awslabs/" name))
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1f9scl5734pgjlsixspwljrrlndzhllwlfygdcr1gx5p0za08zjb"))
+              (patches (search-patches "aws-checksums-cmake-prefix.patch"))))
+    (build-system cmake-build-system)
+    (inputs
+     `(("aws-c-common" ,aws-c-common)))
+    (synopsis "Amazon Web Services checksum library")
+    (description
+     "This library provides cross-Platform hardware accelerated CRC32c and CRC32
+with fallback to efficient C99 software implementations.")
+    (home-page "https://github.com/awslabs/aws-checksums")
+    (license license:asl2.0)))

gnu/packages/patches/aws-checksums-cmake-prefix.patch

@@ -0,0 +1,13 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -8,6 +8,10 @@
+     cmake_policy(SET CMP0069 NEW) # Enable LTO/IPO if available in the compiler, see AwsCFlags
+ endif()
+ 
++if (DEFINED ENV{CMAKE_PREFIX_PATH})
++    set(CMAKE_PREFIX_PATH $ENV{CMAKE_PREFIX_PATH})
++endif()
++
+ if (DEFINED CMAKE_PREFIX_PATH)
+     file(TO_CMAKE_PATH "${CMAKE_PREFIX_PATH}" CMAKE_PREFIX_PATH)
+ endif()