From b7720ade357d033cd0e162f5bd319a1f7be0e090 Mon Sep 17 00:00:00 2001
From: Greg Hogan <code@greghogan.com>
Date: Sat, 10 Oct 2020 17:41:08 +0000
Subject: [PATCH 2/4] gnu: Add aws-checksums.

* gnu/packages/c.scm (aws-checksums): New variable.
---
 gnu/local.mk                                  |  1 +
 gnu/packages/c.scm                            | 25 +++++++++++++++++++
 ...aws-checksums-read-cmake-prefix-path.patch | 13 ++++++++++
 3 files changed, 39 insertions(+)
 create mode 100644
gnu/packages/patches/aws-checksums-read-cmake-prefix-path.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 155de6c590..87e832d0c7 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -813,6 +813,7 @@ 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-read-cmake-prefix-path.patch \
   %D%/packages/patches/azr3.patch \
   %D%/packages/patches/bash-reproducible-linux-pgrp-pipe.patch \
   %D%/packages/patches/bash-completion-directories.patch \
diff --git a/gnu/packages/c.scm b/gnu/packages/c.scm
index a86af02258..a30e589753 100644
--- a/gnu/packages/c.scm
+++ b/gnu/packages/c.scm
@@ -34,6 +34,7 @@
   #: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)
@@ -495,3 +496,27 @@ portability.")
 handling for the AWS SDK for C.")
     (home-page "https://github.com/awslabs/aws-c-common")
     (license license:asl2.0)))
+
+(define-public aws-checksums
+  (package
+    (name "aws-checksums")
+    (version "0.1.9")
+    (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
+                "0s3vfqks3i7jqc12anmcyrjv9rqpxiw0laykfpcmkh2j12017svz"))
+              (patches (search-patches
"aws-checksums-read-cmake-prefix-path.patch"))))
+    (build-system cmake-build-system)
+    (inputs
+     `(("aws-c-common" ,aws-c-common)))
+    (synopsis "Checksum package for AWS SDK for C")
+    (description
+     "Cross-Platform hardware accelerated CRC32c and CRC32 with fallback to
+efficient software implementations.")
+    (home-page "https://github.com/awslabs/aws-checksums")
+    (license license:asl2.0)))
diff --git
a/gnu/packages/patches/aws-checksums-read-cmake-prefix-path.patch
b/gnu/packages/patches/aws-checksums-read-cmake-prefix-path.patch
new file mode 100644
index 0000000000..f6a5c9ad9c
--- /dev/null
+++ b/gnu/packages/patches/aws-checksums-read-cmake-prefix-path.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()
-- 
2.28.0