build: accept both python 3 and python 2

[ginac.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c532668bc180daf8535cf0e3f204472ef0a882c..7989df14386a53183b1ee88055ef0496f6046fd2 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.6)
+cmake_minimum_required(VERSION 3.1)
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")
 
 project(GiNaC)
@@ -25,6 +25,8 @@ add_custom_target(info ALL)
 add_custom_target(html)
 add_custom_target(pdf)
 
+set (CMAKE_CXX_STANDARD 11)
+
 find_package(CLN 1.2.2 REQUIRED)
 include_directories(${CLN_INCLUDE_DIR})
 
@@ -165,10 +167,22 @@ endif()
 
 find_program(MAKEINFO makeinfo)
 find_program(FIG2DEV fig2dev)
+find_program(PYTHON python)
+if (NOT PYTHON)
+       find_program(PYTHON python3)
+endif()
+if (NOT PYTHON)
+       message(FATAL_ERROR "Python version 3 or 2 is required")
+endif()
+
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)
 add_definitions(-DHAVE_CONFIG_H)
 
+if (NOT LIBEXECDIR)
+       set (LIBEXECDIR "${CMAKE_INSTALL_PREFIX}/libexec")
+endif()
+
 add_subdirectory(ginac)
 add_subdirectory(tools)
 add_subdirectory(check)