[CMake] Possible bug in environment variable expansion?
Chris Volpe ARA/SED
cvolpe at ara.com
Fri Aug 15 11:14:06 EDT 2014
Andrew-
You are correct that it was a Windows issue, not a CMake issue. See the post I made about two hours before yours.
The problem isn’t the alphabetic ordering, though. Is the “type” of environment variable. There are two types, “expandable string” and “string”. (There are other types for other general registry values, but env vars can only be of these two types.) It seems that if you create an env var in the normal Windows GUI, the first value you give it determines which type it is. If it contains a reference to another env var, it’s created as “expandable string”, otherwise it’s “string”. The type of the variable isn’t updated if you update the value, so the first value you gave to BOOST_LIBRARYDIR in your test below made it type “string”, even though you modified it to reference %BOOST_ROOT% later. You need to use RapidEE (http://www.rapidee.com/en/about ) to change the type of an env var, since the Windows GUI doesn’t even indicate that there are two types.
-Chris
From: Andrew Maclean [mailto:andrew.amaclean at gmail.com]
Sent: Tuesday, August 12, 2014 6:57 PM
To: cmake at cmake.org; Chris Volpe ARA/SED; Lucas.Pettey at engilitycorp.com
Subject: Re: [CMake] Possible bug in environment variable expansion?
I only define:
BOOST_ROOT=C:\local\boost_1_56_0
BOOST_LIBRARYDIR=C:\local\boost_1_56_0\lib64-msvc-12.0
and this works Ok.
This will not work:
BOOST_LIBRARYDIR=%BOOST_ROOT%\lib64-msvc-12.0
If you go to a command prompt and type "set" you will see that %BOOST_ROOT% is not expanded.
So this is a Windows issue, not a CMake issue.
The only clue I have is that Microsoft expands these variables in order and since BOOST_ROOT is ordered after BOOST_LIBRARYDIR the expansion does not happen.
Regards
Andrew
On Wed, Aug 13, 2014 at 5:37 AM, <cmake-request at cmake.org<mailto:cmake-request at cmake.org>> wrote:
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Today's Topics:
1. Windows RC files with Ninja (Miller, Frank)
2. Re: Possible bug in environment variable expansion?
(Chris Volpe ARA/SED)
---------- Forwarded message ----------
From: "Miller, Frank" <FMiller at sjm.com<mailto:FMiller at sjm.com>>
To: CMake MailingList <cmake at cmake.org<mailto:cmake at cmake.org>>
Cc:
Date: Tue, 12 Aug 2014 16:44:03 +0000
Subject: [CMake] Windows RC files with Ninja
Greetings,
I tried to move from 2.8 to 3.0.1 today and I'm experiencing an issue with RC files. Looks like a simple problem but I would be baffled if I'm the first to experience this so I expect I have some kind of configuration issue. Here is the offending snippet in the rules.ninja file:
rule RC_COMPILER
depfile = $DEP_FILE
deps = gcc
command = "" RC $in "$DEP_FILE" $out "" "c:/Program Files (x86)/Microsoft Visual Studio 12.0/VC/bin/cl.exe" c:\PROGRA~2\WI3CF2~1\8.1\bin\x86\rc.exe $FLAGS $DEFINES /fo$out $in
description = Building RC object $out
If I put the path to "cmcldeps.exe" in the empty quotes on the command line, it works as expected.
Does anyone else have this problem?
Frank
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From: Chris Volpe ARA/SED <cvolpe at ara.com<mailto:cvolpe at ara.com>>
To: Chris Volpe ARA/SED <cvolpe at ara.com<mailto:cvolpe at ara.com>>, "Lucas.Pettey at engilitycorp.com<mailto:Lucas.Pettey at engilitycorp.com>" <Lucas.Pettey at engilitycorp.com<mailto:Lucas.Pettey at engilitycorp.com>>, "cmake at cmake.org<mailto:cmake at cmake.org>" <cmake at cmake.org<mailto:cmake at cmake.org>>
Cc:
Date: Tue, 12 Aug 2014 19:37:47 +0000
Subject: Re: [CMake] Possible bug in environment variable expansion?
As it turns out, something weirder is going on, and it’s not cmake’s fault, so I won’t look for a solution here, but I’ll describe the problem in case anyone’s interested. *Windows* is not expanding those environment variables. First, I hacked up the installed version of FindBoost.cmake to spit out some debugging information, with the following, circa line 860:
message(DEBUG "_ENV_BOOST_LIBRARYDIR has value <${_ENV_BOOST_LIBRARYDIR}>")
and then I ran configure in debug mode, which gave me the following from my extra hacked debugging output:
DEBUG_ENV_BOOST_LIBRARYDIR has value <%BOOST_ROOT%/lib64-msvc-12.0>
So, when cmake asked the OS for the BOOST_LIBRARYDIR environment variable, the OS gave it the string without expanding BOOST_ROOT. I have verified this OS behavior by opening up a command window and using the set command: It’s not getting expanded. I’ve verified (with RapidEE) that the environment variables in question are of type “expandable string”, not “string”.
While playing with the variables in RapidEE (a wonderful tool, BTW), I noticed two other strange things. First, I do have a couple of env vars that do have other env var references in them, and they *do* get expanded in cmd.exe. Second, my PATH env var used to have embedded env vars for various things, but somewhere along the way they all got replaced in the PATH *definition* with their expanded versions, so now everything in my path is now “hard coded”, so to speak. Ugh.
So, basically, something is messed up in my system.
From: CMake [mailto:cmake-bounces at cmake.org<mailto:cmake-bounces at cmake.org>] On Behalf Of Chris Volpe ARA/SED
Sent: Tuesday, August 12, 2014 12:44 PM
To: Lucas.Pettey at engilitycorp.com<mailto:Lucas.Pettey at engilitycorp.com>; cmake at cmake.org<mailto:cmake at cmake.org>
Subject: Re: [CMake] Possible bug in environment variable expansion?
That’s a good thought, but unfortunately it didn’t pan out. I tried both styles, and I even tried explicitly mixing styles like this:
BOOST_LIBRARYDIR=C:/local/boost_1_55_0\lib64-msvc-12.0
Or this:
BOOST_LIBRARYDIR=C:\local\boost_1_55_0/lib64-msvc-12.0
And those worked fine.
From: Lucas.Pettey at engilitycorp.com<mailto:Lucas.Pettey at engilitycorp.com> [mailto:Lucas.Pettey at engilitycorp.com<mailto:Lucas.Pettey at engilitycorp.com>]
Sent: Monday, August 11, 2014 11:03 PM
To: Chris Volpe ARA/SED; cmake at cmake.org<mailto:cmake at cmake.org>
Subject: RE: Possible bug in environment variable expansion?
Could it be something as simple as UNIX (slash /) vs Windows (backslash \) in the directory expression?
When this environment variable is expanded BOOST_LIBRARYDIR=%BOOST_ROOT%\lib64-msvc-12.0, it looks like it is converting the %BOOST_ROOT% in UNIX style and then the "\lib-msvc-12.0" is Windows. This mixture of styles may be causing a "no such directory" system error. I know on Windows systems I need to be consistent with directory styles or it fails.
Lucas Pettey, PhD
HPCMP PETTT EQM CTA Lead
ERDC-DSRC OnSite
Vicksburg, MS
512-297-9833<tel:512-297-9833> Mobile (preferred)
601-634-2980<tel:601-634-2980> Office
lucas.pettey at engilitycorp.com<mailto:lucas.pettey at engilitycorp.com>
________________________________
From: CMake [cmake-bounces at cmake.org<mailto:cmake-bounces at cmake.org>] on behalf of Chris Volpe ARA/SED [cvolpe at ara.com<mailto:cvolpe at ara.com>]
Sent: Monday, August 11, 2014 6:25 PM
To: cmake at cmake.org<mailto:cmake at cmake.org>
Subject: [CMake] Possible bug in environment variable expansion?
I am trying to build an Open Source project called PCL which uses Boost, and CMake’s ability to find the Boost libraries seems dependent on whether the BOOST_LIBRARYDIR contains a literal path string, or whether it contains a string that incorporates the expansion of BOOST_ROOT. Here are the details:
Boost is installed from a pre-built installer in the folder C:\local\boost_1_55_0. This folder contains, among other things, a subfolder called “boost”, which contains the headers, and a subfolder called “lib64-msvc-12.0”, which contains 64-bit libraries built with MS Visual Studio 2013. Ordinarily, CMake would like that folder to be called simply “lib”, but that’s not what the installer created, so I’m trying to override the default with environment variables. I have the following three environment variables defined, all of which are of type “Expandable string”:
BOOST_ROOT=C:\local\boost_1_55_0
BOOST_INCLUDEDIR=%BOOST_ROOT%
BOOST_LIBRARYDIR=%BOOST_ROOT%\lib64-msvc-12.0
With these settings, CMake reports an error during the configuration process, as follows:
CMake Error at C:/Program Files (x86)/CMake/share/cmake-3.0/Modules/FindBoost.cmake:1179 (message):
Unable to find the requested Boost libraries.
Boost version: 1.55.0
Boost include path: C:/local/boost_1_55_0
Could not find the following Boost libraries:
boost_system
boost_filesystem
boost_thread
boost_date_time
boost_iostreams
boost_chrono
No Boost libraries were found. You may need to set BOOST_LIBRARYDIR to the
directory containing Boost libraries or BOOST_ROOT to the location of
Boost.
Call Stack (most recent call first):
cmake/pcl_find_boost.cmake:38 (find_package)
CMakeLists.txt:230 (include)
But if change the definition of BOOST_LIBRARYDIR by replacing “%BOOST_ROOT%” with the value assigned to BOOST_ROOT, resulting in this:
BOOST_LIBRARYDIR=C:\local\boost_1_55_0\lib64-msvc-12.0
the configuration succeeds. The only difference seems to be whether the “C:\local\boost_1_55_0” part of the path is specified explicitly, or obtained implicitly with %BOOST_ROOT%. It would surprise me if this behavior were by design. Does anyone have an explanation for this?
Thanks,
Chris
Christopher R. Volpe, Ph.D.
Senior Scientist, Remote Sensing & Decision Analytics
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