REF: JVB GFTN-003<br>
File: <a href="abs_test1.f90">abs_test1.f90</a><br>
Example:<pre>
C:\gfortran_stuff\James\test\abs_test>gfortran -std=f95 abs_test1.f90 -oabs_test
1

C:\gfortran_stuff\James\test\abs_test>abs_test1
                     NaN

C:\gfortran_stuff\James\test\abs_test>gfortran -v
Using built-in specs.
Configured with: ../gcc/configure --prefix=/mingw --enable-languages=c,f95
Thread model: win32
gcc version 4.0.0 20050117 (experimental)
</pre>
Discussion: CDABS should be marked as nonstandard; NaN is wrong.<br>
XREF: <a href="http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19575">PR19575</a>