Add dependancies versions requirement

Author: Corentin Derbois

.appveyor.yml

@@ -14,16 +14,10 @@ environment:
     - MINICONDA: C:\Miniconda36-x64
       FFTW_INSTALL_MODE: conda-forge
       FFTW_ROOT:
-    - MINICONDA: C:\Miniconda36
-      FFTW_INSTALL_MODE: conda-forge
-      FFTW_ROOT:
       # fftw from the "official" fftw website build
     - MINICONDA: C:\Miniconda36-x64
       FFTW_INSTALL_MODE: official
       FFTW_ROOT: C:\fftw_download
-    - MINICONDA: C:\Miniconda36
-      FFTW_INSTALL_MODE: official
-      FFTW_ROOT: C:\fftw_download
 
 matrix:
   exclude:
@@ -42,7 +36,7 @@ install:
   - conda config --add channels conda-forge
   - conda update -q conda
   - conda info -a
-  - conda install xtensor
+  - conda install xtensor=0.20.10 -c conda-forge
   - IF "%FFTW_INSTALL_MODE%"=="official" ( Powershell.exe -File appveyor_install_fftw.ps1 ) ELSE IF "%FFTW_INSTALL_MODE%"=="conda-forge" ( conda install fftw )
   - cd %APPVEYOR_BUILD_FOLDER%
   - mkdir build

CMakeLists.txt

@@ -65,12 +65,14 @@ set(CMAKE_CXX_EXTENSIONS NO)
 include_directories(${XTENSOR_FFTW_INCLUDE_DIR})
 
 # .. xtensor
-find_package(xtensor REQUIRED)
+set(xtensor_REQUIRED_VERSION 0.20.10)
+find_package(xtensor ${xtensor_REQUIRED_VERSION} REQUIRED)
 message(STATUS "Found xtensor: ${xtensor_INCLUDE_DIRS}/xtensor")
 include_directories(${xtensor_INCLUDE_DIRS})
 
 # .. xtl
-find_package(xtl REQUIRED)
+set(xtl_REQUIRED_VERSION 0.6.7)
+find_package(xtl ${xtl_REQUIRED_VERSION} REQUIRED)
 message(STATUS "Found xtl: ${xtl_INCLUDE_DIRS}/xtl")
 include_directories(${xtl_INCLUDE_DIRS})
 
@@ -163,4 +165,4 @@ configure_file(${PROJECT_NAME}.pc.in
         "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
         @ONLY)
 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
-        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig/")
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig/")

README.md

@@ -46,6 +46,10 @@ make install
 * [FFTW](http://www.fftw.org/) version 3
 * A compiler supporting C++14
 
+| `xtensor-fftw` | `xtensor` | `xtl`   | `fftw`  |
+|----------------|-----------|---------|---------|
+|  master        | ^0.20.10  |  ^0.6.7 | ^3.3.8  |
+
 ## Usage
 
 _xtensor-fftw_ is a header-only library.