From: Augustin Degomme <adegomme@users.noreply.github.com>
Date: Tue, 27 Aug 2019 23:09:12 +0000 (+0200)
Subject: let's be gentle with old cmakes which can't handle missing optional boost libs
X-Git-Tag: v3.24~131
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/de111d672f9520069004c03d5677986db430d8a2?hp=e58625669e36632ed81ac391312d5676f5f8c247

let's be gentle with old cmakes which can't handle missing optional boost libs
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d126e14bd6..28cb796ab8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -288,7 +288,12 @@ set(_Boost_STACKTRACE_ADDR2LINE_HEADERS "boost/stacktrace.hpp")
     if(APPLE)
       message(FATAL_ERROR "Boost libraries not found. Try to install them with 'sudo fink install boost1.53.nopython' (check the exact name with 'fink list boost') or 'sudo brew install boost'")
     else()
-      message(FATAL_ERROR "Boost libraries not found. Install libboost-dev (>= 1.48.0).")
+      if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} LESS 3.11)
+        find_package(Boost 1.48) #try again with just boost, as old cmake may fail.
+      endif()
+      if(NOT Boost_FOUND)
+        message(FATAL_ERROR "Boost libraries not found. Install libboost-dev (>= 1.48.0).")
+      endif()
     endif()
   endif()