From 4c66a8deb5f51fd4f944fb62c43aa1e2a477711c Mon Sep 17 00:00:00 2001
From: Greg Hogan <code@greghogan.com>
Date: Sat, 10 Oct 2020 17:41:08 +0000
Subject: gnu: Add aws-checksums.
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* 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                                       |  1 +
 gnu/packages/c.scm                                 | 25 ++++++++++++++++++++++
 .../patches/aws-checksums-cmake-prefix.patch       | 13 +++++++++++
 3 files changed, 39 insertions(+)
 create mode 100644 gnu/packages/patches/aws-checksums-cmake-prefix.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 2f267e8aee..0daac5746b 100644
--- a/gnu/local.mk
+++ b/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	\
diff --git a/gnu/packages/c.scm b/gnu/packages/c.scm
index 628e8c0dad..bb3d90e1cd 100644
--- a/gnu/packages/c.scm
+++ b/gnu/packages/c.scm
@@ -36,6 +36,7 @@ (define-module (gnu packages c)
   #: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 @@ (define-public aws-c-common
  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)))
diff --git a/gnu/packages/patches/aws-checksums-cmake-prefix.patch b/gnu/packages/patches/aws-checksums-cmake-prefix.patch
new file mode 100644
index 0000000000..f6a5c9ad9c
--- /dev/null
+++ b/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()
-- 
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