From b690bdf1484a2c07ebec1075fcc278e982c00509 Mon Sep 17 00:00:00 2001
From: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>
Date: Sat, 30 Jan 2016 03:16:22 -0500
Subject: [PATCH] FindAsciiDoc: fix CMP0053 warning with cmake 3.1

Backported from zeromq/libzmq@032c5ed

This commit fixes the following warnings:

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CMake Warning (dev) at builds/cmake/Modules/FindAsciiDoc.cmake:9 (find_program):
  Policy CMP0053 is not set: Simplify variable reference and escape sequence
  evaluation.  Run "cmake --help-policy CMP0053" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  For input:

    '$ENV{PROGRAMFILES(X86)}/asciidoc'

  the old evaluation rules produce:

    '/asciidoc'

  but the new evaluation rules produce an error:

    Syntax error in cmake code at
      /path/to/builds/cmake/Modules/FindAsciiDoc.cmake:13
    when parsing string
      $ENV{PROGRAMFILES(X86)}/asciidoc
    Invalid character ('(') in a variable name: 'PROGRAMFILES'

  Using the old result for compatibility since the policy is not set.
Call Stack (most recent call first):
  CMakeLists.txt:193 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.
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and

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CMake Warning (dev) at builds/cmake/Modules/FindAsciiDoc.cmake:15 (find_program):
  Policy CMP0053 is not set: Simplify variable reference and escape sequence
  evaluation.  Run "cmake --help-policy CMP0053" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  For input:

    '$ENV{PROGRAMFILES(X86)}/asciidoc'

  the old evaluation rules produce:

    '/asciidoc'

  but the new evaluation rules produce an error:

    Syntax error in cmake code at
      /path/to/builds/cmake/Modules/FindAsciiDoc.cmake:19
    when parsing string
      $ENV{PROGRAMFILES(X86)}/asciidoc
    Invalid character ('(') in a variable name: 'PROGRAMFILES'

  Using the old result for compatibility since the policy is not set.
Call Stack (most recent call first):
  CMakeLists.txt:193 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.
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---
 builds/cmake/Modules/FindAsciiDoc.cmake | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/builds/cmake/Modules/FindAsciiDoc.cmake b/builds/cmake/Modules/FindAsciiDoc.cmake
index db4e418c..049ac007 100644
--- a/builds/cmake/Modules/FindAsciiDoc.cmake
+++ b/builds/cmake/Modules/FindAsciiDoc.cmake
@@ -6,19 +6,21 @@
 # A2X_EXECUTABLE - the full path to a2x
 # A2X_FOUND - If false, don't attempt to use a2x.
 
+set (PROGRAMFILESX86 "PROGRAMFILES(X86)")
+
 find_program(ASCIIDOC_EXECUTABLE asciidoc asciidoc.py
              PATHS "$ENV{ASCIIDOC_ROOT}"
                    "$ENV{PROGRAMW6432}/asciidoc"
                    "$ENV{PROGRAMFILES}/asciidoc"
-                   "$ENV{PROGRAMFILES(X86)}/asciidoc")
+                   "$ENV{${PROGRAMFILESX86}}/asciidoc")
 
 find_program(A2X_EXECUTABLE a2x
              PATHS "$ENV{ASCIIDOC_ROOT}"
                    "$ENV{PROGRAMW6432}/asciidoc"
                    "$ENV{PROGRAMFILES}/asciidoc"
-                   "$ENV{PROGRAMFILES(X86)}/asciidoc")
+                   "$ENV{${PROGRAMFILESX86}}/asciidoc")
 
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_ARGS(AsciiDoc REQUIRED_VARS ASCIIDOC_EXECUTABLE)
-mark_as_advanced(ASCIIDOC_EXECUTABLE A2X_EXECUTABLE)
\ No newline at end of file
+mark_as_advanced(ASCIIDOC_EXECUTABLE A2X_EXECUTABLE)