From 0d7c0869a500da3c90399f6ee97d00e94917b1fc Mon Sep 17 00:00:00 2001
From: kai <kai@redstar.de>
Date: Mon, 25 Jun 2012 23:42:58 +0200
Subject: [PATCH] Replace find-alt-triple.sh with CMake regular expressions.

This has the advantage that it works on Windows, too.
---
 CMakeLists.txt     | 10 +++++-----
 find-alt-triple.sh | 19 -------------------
 2 files changed, 5 insertions(+), 24 deletions(-)
 delete mode 100755 find-alt-triple.sh

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a5f15a91..e6c2c389 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -131,11 +131,11 @@ set(DEFAULT_TARGET ${LLVM_HOST_TARGET} CACHE STRING "default target")
 add_definitions(-DDEFAULT_TARGET_TRIPLE="${DEFAULT_TARGET}")
 
 # Generate the alternate target triple (x86 on x86_64 and vice versa.)
-execute_process(
-    COMMAND /bin/sh ${PROJECT_SOURCE_DIR}/find-alt-triple.sh ${LLVM_HOST_TARGET}
-    OUTPUT_VARIABLE HOST_ALT_TARGET
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-)
+if(LLVM_HOST_TARGET MATCHES "i[3-9]86-")
+    string(REGEX REPLACE "^i[3-9]86-(.*)" "x86_64-\\1" HOST_ALT_TARGET ${LLVM_HOST_TARGET})
+elseif(LLVM_HOST_TARGET MATCHES "^x86_64-.*")
+    string(REGEX REPLACE "^x86_64-(.*)" "i686-\\1" HOST_ALT_TARGET ${LLVM_HOST_TARGET})
+endif()
 set(DEFAULT_ALT_TARGET ${HOST_ALT_TARGET} CACHE STRING "default alt target")
 add_definitions(-DDEFAULT_ALT_TARGET_TRIPLE="${DEFAULT_ALT_TARGET}")
 
diff --git a/find-alt-triple.sh b/find-alt-triple.sh
deleted file mode 100755
index 443f229c..00000000
--- a/find-alt-triple.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/bash
-
-HOST_TARGET=$1
-
-[ "$HOST_TARGET" = "" ] && exit 1
-
-REST=`echo $HOST_TARGET   | sed -e 's/[a-zA-Z0-9_]*\(\-.*\)/\1/'`
-X86=`echo $HOST_TARGET    | sed -e 's/\(i[3-9]86\)\-.*/\1/'`
-X86_64=`echo $HOST_TARGET | sed -e 's/\(x86_64\)\-.*/\1/'`
-
-ALT=
-if [ "$X86_64" != "$HOST_TARGET" ]; then
-    ALT="i686$REST"
-
-elif [ "$X86" != "$HOST_TARGET" ]; then
-    ALT="x86_64$REST"
-fi
-
-echo $ALT