Well now that I have the test suite working easy I decided to explore a little.
At higher levels of optimization everything works good except:
$ gfc -w -O2 FM013.f
/tmp/ccm7knWJ.o(.text+0x4a3): In function `MAIN__':
FM013.f: undefined reference to `.L3'
/tmp/ccm7knWJ.o(.text+0x598):FM013.f: undefined reference to `.L15'
/tmp/ccm7knWJ.o(.text+0x5c4):FM013.f: undefined reference to `.L15'
/tmp/ccm7knWJ.o(.text+0x68a):FM013.f: undefined reference to `.L27'
collect2: ld returned 1 exit status
This is not really a Fortran issue.
--
Summary: NIST Failure - FM013.f at -O2
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jvdelisle at gcc dot gnu dot org
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25251