Hey you seem to have fallen asleep on the send key there! You need to divide and conquer: The way I would attack this problem is to: a) start with one line and compile that. E.g. "double precision d" (simple program, eh)? Then compile and run that. Then add your next line, assignment to zero, compile and run that. At least that will tell you which line is causing the problem. b) Try compiling your code on another platform with gcc, if you've got access to another machine. Does it cause the same problem - perhaps this is a machine specific problem. If it still causes a problem then: c) Compile using a different fortran compiler. Having done all that you'll be in a much better position to understand the problem you're facing. Cheers, David. ----- Original Message ----- From: "Roger Ghanem" <ghanem@xxxxxxxxxxxxx> To: <gcc-help@xxxxxxxxxxx> Sent: Friday, November 18, 2005 5:07 PM Subject: gfortran on 64-bit > I am having some difficulties writing double precision variables using gfortran in 64-bit mode: > source code is > > double precision d > d=0. > write(0,*) d > end > > $ /usr/local/usr/bin/gfortran-4.0 -m64 -o pmain2 pmain2.f -L/usr/local/usr/lib > $ ./pmain2 > Illegal instruction > > If I define d to be integer, then I am able to print it with no problem. > > Configuration for this gfortran: > > $ /usr/local/usr/bin/gfortran-4.0 -v > Using built-in specs. > Target: powerpc-apple-darwin8 > Configured with: /Build/apple/gcc/build/obj/src/configure --disable-checking -enable-werror - -prefix=/usr --mandir=/share/ > man --enable-languages=c,objc,c+ > +,obj-c++,f95 --program-transform-name=/^[cg][^.-]*$/s/$/-4.0/ --with-gxx-in clude-dir=/include/c++/4.0.0 --build=powerpc- > apple-darwin8 --host=powerpc-apple- > darwin8 --target=powerpc-apple-darwin8 > Thread model: posix > gcc version 4.0.1 (Apple Computer, Inc. build 5224) > > Thank you for your help > Roger Ghanem > > > Roger Ghanem > 254C Kaprielian Hall > University of Southern California > Los Angeles, CA 90089 > Tel: 213 740 9528 > Fax: 213 740 2037 > >
