From f88850d6ead498cd60924dd751d4be8f5d15d094 Mon Sep 17 00:00:00 2001
From: Nick Gasson <nick@nickg.me.uk>
Date: Tue, 29 Aug 2017 12:31:57 +0100
Subject: [PATCH] Changes to support OpenBSD

---
 README.md           | 13 +++++++++++--
 autogen.sh          |  5 +++++
 src/cgen.c          |  2 +-
 tools/fetch-ieee.sh |  9 ++++++++-
 4 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 7a67b2d9..f564bfac 100644
--- a/README.md
+++ b/README.md
@@ -89,12 +89,21 @@ To build from source follow the generic instructions above.
 
 Windows support is via [Cygwin](http://www.cygwin.com/). Use `setup.exe` to install
 either `gcc` or `clang` and the following dependencies: `automake`, `autoconf`,
-`pkg-config`, `llvm`, `libllvm-devel`, `flex`, `libffi-devel`, `libcurses-devel`, `curl`, 
+`pkg-config`, `llvm`, `libllvm-devel`, `flex`, `libffi-devel`, `libcurses-devel`, `curl`,
 and `make`. Then follow the standard installation instructions above.
 
 #### OpenBSD
 
-TODO
+Install the dependencies with `pkg_add`:
+
+    pkg_add -r llvm libexecinfo autoconf automake
+
+Use a modern compiler such as Clang to build, as the system GCC does not support many modern
+language features.
+
+    ./configure --with-llvm=/usr/local/bin/llvm-config CC=clang CXX=clang++
+
+Then follow the generic instructions above.
 
 #### IEEE Libraries
 
diff --git a/autogen.sh b/autogen.sh
index 2caa76ab..f03a6397 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,3 +1,8 @@
 #!/bin/sh
+
+# Required for OpenBSD
+export AUTOCONF_VERSION=2.69
+export AUTOMAKE_VERSION=1.15
+
 cd $(git rev-parse --show-toplevel)
 autoreconf --force --install -I m4
diff --git a/src/cgen.c b/src/cgen.c
index 16f4d3fd..1978c07b 100644
--- a/src/cgen.c
+++ b/src/cgen.c
@@ -3728,7 +3728,7 @@ static void cgen_native(tree_t top)
       LLVMCreateTargetMachine(target_ref, def_triple, "", "",
                               LLVMCodeGenLevelDefault,
                               LLVMRelocPIC,
-                              LLVMCodeModelJITDefault);
+                              LLVMCodeModelDefault);
 
    char *obj_name LOCAL = xasprintf("_%s." LLVM_OBJ_EXT, istr(tree_ident(top)));
 
diff --git a/tools/fetch-ieee.sh b/tools/fetch-ieee.sh
index 6bc1bd07..e4c2d188 100755
--- a/tools/fetch-ieee.sh
+++ b/tools/fetch-ieee.sh
@@ -21,7 +21,14 @@ download_file() {
   # download
   curl -sSL -o "$bn" "$url"
   # shasum
-  check=$(shasum -a 256 "$bn" | awk '{ print $1 }')
+case `uname` in
+      OpenBSD)
+          check=$(sha256 -q "$bn")
+          ;;
+      *)
+          check=$(shasum -a 256 "$bn" | awk '{ print $1 }')
+          ;;
+  esac
 
   echo "$bn"
 
-- 
2.39.2