Hello!
I try to download, extract, configure, build and install a library with CMake.
My CMakeLists.txt contains the following lines:
cmake_minimum_required (VERSION 2.6)
project (example CXX)
set(CMAKE_VERBOSE_MAKEFILE ON)
include(ExternalProject)
include(ProcessorCount)
ProcessorCount(N)
if(NOT N EQUAL 0)
set(CMAKE_BUILD_FLAGS -j${N})
endif()
ExternalProject_Add(eigen
PREFIX third_party
DOWNLOAD_DIR third_party/eigen/download
SOURCE_DIR third_party/eigen/src
BINARY_DIR third_party/eigen/build
INSTALL_DIR third_party/eigen/install
DOWNLOAD_COMMAND wget
http://bitbucket.org/eigen/eigen/get/3.2.4.tar.gz && tar xvzf 3.2.4.tar.gz -C
../src --strip-components=1
)
In this example, the installation step fails with the following error message:
CMake Error at cmake_install.cmake:38 (FILE):
file cannot create directory: /usr/local/include/eigen3. Maybe need
administrative privileges.
It means that the value of INSTALL_DIR is not taken into account during the
configuration process.
Why? What am I do wrong?
Thank you very much for your help.
Best regards,
Cédric Doucet
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