--enable-environment add to configure for SOLVENT things

git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@8638 c92efa57-630b-4861-b058-cf58834340f0

install/configure

@@ -1314,6 +1314,7 @@ Optional Features:
   --disable-wrappers      disable C to fortran wrapper check (default:
                           enabled)
   --enable-signals        enable signal trapping (default: no)
+  --enable-environment    compile with exact exchange enabled (default: no)
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -1896,9 +1897,21 @@ else
 fi
 
 # -----------------------------
-# more options (currently none)
+# more options
 # ----------------------------
 
+# Check whether --enable-environment was given.
+if test "${enable_environment+set}" = set; then
+  enableval=$enable_environment; if   test "$enableval" = "yes" ; then
+      enable_environment=1
+   else
+      enable_environment=0
+   fi
+else
+  enable_environment=0
+fi
+
+
 # store variables from the environment, if set (may be or not be set)
 # If set, they take precedence over configure internal choice.
 # Flags and libraries are accepted without further testing;
@@ -2137,6 +2150,11 @@ echo "$as_me: WARNING: $arch : unsupported architecture?" >&2;}
         ;;
 esac
 
+if test "$enable_environment" -eq 1 ;
+then
+        try_dflags="$try_dflags -D__ENVIRONMENT"
+fi
+
 # check serial Fortran 90 compiler. This must be done before performing
 # the check for the parallel compiler (section below) because option
 # --disable-parallel will do very strange things otherwise. The reason

install/configure.ac

@@ -105,9 +105,19 @@ AC_ARG_WITH(internal-lapack,
    fi],
    [use_internal_lapack=0])
 # -----------------------------
-# more options (currently none)
+# more options 
 # ----------------------------
 
+AC_ARG_ENABLE(environment,
+   [AS_HELP_STRING([--enable-environment],
+       [compile with exact exchange enabled (default: no)])],
+    [if   test "$enableval" = "yes" ; then
+      enable_environment=1
+   else
+      enable_environment=0
+   fi],
+   [enable_environment=0])
+
 # store variables from the environment, if set (may be or not be set)
 # If set, they take precedence over configure internal choice.
 # Flags and libraries are accepted without further testing;
@@ -268,6 +278,11 @@ ppc64-bg )
         ;;
 esac
 
+if test "$enable_environment" -eq 1 ;
+then
+        try_dflags="$try_dflags -D__ENVIRONMENT"
+fi
+
 # check serial Fortran 90 compiler. This must be done before performing
 # the check for the parallel compiler (section below) because option
 # --disable-parallel will do very strange things otherwise. The reason