How to install gfortran
#How to install gfortran windows#
Under Quick Links follow the link Binaries for windows.(Once TDM catches up to gcc-5.3 I suggest getting that one instead.) Luckily, this problem is resolved for gcc-5.3.0, so we will be getting this one instead. It is true that the installation runs very smoothly (and I would suggest it for this reason alone). Unfortunately the most recent gcc version available (at the time of writing this blogpost) was gcc-5.1.0 which gives rather nasty segmentation faults when trying to compile and test Lapack under windows. Installing the compilerĪ common suggestion for installing a 64bit version of gfortran is the use of the TDM-GCC MingW compiler-installer. Legend: Menu-paths / Important / Errors A.
So you need to install a new compiler capable of providing 64-bit programs. (In practice, generally you will not even reach 4Gb before running into problems.) This is because the memory address of your data is stored as a 32-bit value (2 32 = 4 294 967 296 = 4Gb) so the only way out of this predicament is a “larger address” aka 64-bit. You may first start to look for ways of increasing the stack-size of your program, but you will soon discover that the problem is more profound: a 32-bit program cannot access address spacing beyond 4Gb. When we installed a fortran compiler and the code::blocks IDE, the default fortran compiler generated 32-bit programs. This generally is not an issue, unless you need a large amount of memory, for example to store a temporary array with 400 3 double precision coordinates (as I did for a project I’m currently working on). On such systems, 32-bit programs will run fine, but 64-bit programs can make more efficient use of the underlying system. Current day computers generally have 64-bit processors, and most even have 64-bit operating systems.