CODEWITHSUNDEEP
cmake
Aleksei
Aleksei

Reputation: 1227

How to set PATH environment variable in CMake script?

I want to build my sources by Mingw compiler which in not placed on my system PATH. I tried this in the beginning of my script:

set(Env{PATH} "c:/MyProject/Tools/mingw/bin/" "c:/MyProject/Tools/mingw/msys/1.0/bin/")

And this:

set(CMAKE_PROGRAM_PATH "c:/MyProject/Tools/mingw/bin/"   "c:/MyProject/Tools/mingw/msys/1.0/bin/")
set(CMAKE_LIBRARY_PATH "c:/MyProject/Tools/mingw/bin/" "c:/MyProject/Tools/mingw/msys/1.0/bin/")
set(CMAKE_SYSTEM_PROGRAM_PATH "c:/MyProject/Tools/mingw/bin/" "c:/MyProject/Tools/mingw/msys/1.0/bin/")
set(CMAKE_SYSTEM_PREFIX_PATH "c:/MyProject/Tools/mingw/bin/" "c:/MyProject/Tools/mingw/msys/1.0/bin/")

The first variant doesn't work at all. A suggest that I can't overwrite the value of the environment variable in CMake script. The second script finds my mingw compiler, but catches the error while running gcc (can't find libgmp-10.dll which needs by gcc). This is because the PATH variable is not set to my Mingw.

Upvotes: 22

Views: 109309

Answers (3)

Ding-Yi Chen
Ding-Yi Chen

Reputation: 3258

CMAKE_SYSTEM_PROGRAM_PATH is not meant to be modified, use

LIST(APPEND CMAKE_PROGRAM_PATH  "c:/MyProject/Tools/mingw/bin/" ...)

Upvotes: 23

Naszta
Naszta

Reputation: 7734

Write a script file to start CMake.

On Windows make a batch file:

@echo off
set path=c:\MyProject\Tools\mingw\bin;c:\MyProject\Tools\mingw\msys\1.0\bin
"C:\Program Files\CMake 2.8\bin\cmake-gui.exe"

On Linux make a bash script:

export PATH=$PATH:/your/path

Upvotes: -6

Rian Sanderson
Rian Sanderson

Reputation: 6702

You might approach it as if it were a cross compiling toolchain, even if you're not cross compiling from Linux to Windows as in this example:

http://www.vtk.org/Wiki/CmakeMingw

After you follow that guide you set the mingw toolchain at the command line when calling cmake:

~/src/helloworld/ $ mkdir build
~/src/helloworld/ $ cd build
~/src/helloworld/build/ $ cmake -DCMAKE_TOOLCHAIN_FILE=~/Toolchain-mingw32.cmake

then if you're using this a whole lot you can make an alias to limit typing in that ugly -D every time you want to regenerate makefiles:

alias mingw-cmake='cmake -DCMAKE_TOOLCHAIN_FILE=~/Toolchain-mingw32.cmake'

Upvotes: 4

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