Problem concerning the -U flag

Question

There is a problem concerning the -U Fortran compiler flag in SS12. I use the -U flag in all my projects because, using that flag, capitalization matters (so that, e.g., the compiler treats "foo" and "Foo" as different variables). However, in some projects, although the compiler builds the project correctly, when I try to execute the resulting executable from within SS2, I get the following error message:
make[2]: m2c: Command not found
make[2]: *** [project name] Error 127
make[2]: Leaving directory `[working directory]'
*** Error code 2
..................Note that I can execute it directly (from a terminal window) without any problem. I just cannot execute it by pressing <F6> in SS2. The strange thing is that it does not happen to all my projects, although all of them are based on similar Makefiles. Note also that when I remove the -U flag and rebuild, all projects can be executed from within SS2.

Answer 1

With my own Fortran Makefiles (on any platform), I use '.SUFFIXES:' rules to get rid of
any built-in .mod rules for Modula. You have to put a blank .SUFFIXES to flush the
built-in rules, then add your actual suffixes.In fact, a single blank .SUFFIXES solves the problem. Thank you very much for the hint.
However, I still cannot understand why this .SUFFIXES blank line is necessary in some projects while it is not in other (similar) projects.
By default Sun Studio IDE uses GNU make on Linux only. On Solaris
it is using "dmake". Which platform do you use, Linux or Solaris?I use Linux (Debian 4 x64 version).