cc: @SilvioPipolo @valsson

Can be used for numeric comparisons in precompiler directives

Try to fix SASA compilation error with recent INTEL compilers

Closes #721 

This reverts commit 50ecd12f.

Error is this one:
../maketools/makelinks.sh: line 24: echo: write error: Broken pipe

It's triggered by the comparison with a <(echo) file, since the comparison
might fail before echo completes. If this works I will backport it

Error is this one:
../maketools/makelinks.sh: line 24: echo: write error: Broken pipe

It's triggered by the comparison with a <(echo) file, since the comparison
might fail before echo completes. If this works I will backport it

This reverts commit cc471663.

minor improvements to OPES_EXPANDED

minor improvements to OPES_METAD

In this manner later we could make the two modules independent

probably these writes should be formatted to avoid inconsistencies
btw compilers

Not used yet, but could be useful