Copying updated installation script from release branch and removing older package-specific build scripts.

Signed-off-by: Damian Rouson <damian@rouson.net>

Author: rouson

install.sh

@@ -159,14 +159,34 @@ find_or_install()
   fi 
 
   # Now we know the $executable is not in the PATH or is not an acceptable version
-  printf "Ok to downloand, build, and install $package from source?\n"
+  printf "Ok to downloand, build, and install $package from source? (y/n) "
+  read proceed
   if [[ $proceed == "y" ]]; then
     printf "Downloading, building, and installing $package \n"
     cd install_prerequisites &&
     if [[ $package == "gcc" ]]; then
-      FC=gfortran CC=gcc CXX=g++ ./build flex --default $num_threads 
-      flex_install_path=`./build flex --default --query` &&
-      PATH=$flex_install_path/bin:$PATH
+      # Building GCC from source requires flex
+      printf "Building requires the 'flex' package.\n"
+      printf "Checking flex is in the PATH... "
+      if type flex > /dev/null; then
+        printf "yes\n"
+      else
+        printf "no\n"
+        printf "Ok to downloand, build, and install flex from source? (y/n) "
+        read build_flex
+        if [[ $build_flex == "y" ]]; then
+          FC=gfortran CC=gcc CXX=g++ ./build flex 
+          flex_install_path=`./build flex --default --query` &&
+          if [[ -f $flex_install_path/bin/flex ]]; then
+            printf "Installation successful."
+            printf "$package is in $flex_install_path/bin \n"
+          fi
+          PATH=$flex_install_path/bin:$PATH
+        else
+          printf "Aborting. Building GCC requires flex.\n"
+          exit 1
+        fi
+      fi
     fi
     FC=gfortran CC=gcc CXX=g++ ./build $package --default $num_threads &&
     package_install_path=`./build $package --default --query` &&
@@ -189,7 +209,7 @@ find_or_install()
       exit 1
     fi
   else
-    printf "Aborting. OpenCoarrays installation requires $package"
+    printf "Aborting. OpenCoarrays installation requires $package \n"
     exit 1
   fi
   printf "$this_script: the dependency installation logic is missing a return or exit.\n"

install_prerequisites/acceptable_compiler.f90

@@ -1,5 +1,39 @@
+!
+! acceptable_compiler
+!
+! -- Report whether the compiler version equals or exceeds the first 
+!    OpenCoarrays-aware version
+!
+! OpenCoarrays is distributed under the OSI-approved BSD 3-clause License:
+! Copyright (c) 2015, Sourcery, Inc.
+! Copyright (c) 2015, Sourcery Institute
+! All rights reserved.
+!
+! Redistribution and use in source and binary forms, with or without modification, 
+! are permitted provided that the following conditions are met:
+! 
+! 1. Redistributions of source code must retain the above copyright notice, this 
+!    list of conditions and the following disclaimer.
+! 2. Redistributions in binary form must reproduce the above copyright notice, this 
+!    list of conditions and the following disclaimer in the documentation and/or 
+!    other materials provided with the distribution.
+! 3. Neither the names of the copyright holders nor the names of their contributors 
+!    may be used to endorse or promote products derived from this software without 
+!    specific prior written permission.
+! 
+! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
+! ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+! WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+! IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
+! INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
+! NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+! PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+! POSSIBILITY OF SUCH DAMAGE.
+
 program main
   use iso_fortran_env, only : compiler_version
   implicit none
-  print *,compiler_version() >= " GCC version 5.1.0"
+  print *,compiler_version() >= "GCC version 5.1.0 " 
 end program