Hi,
i am trying to install AMBER10 which is a molecular dynamcis package onto two linux red hat pcs. I can successfully install the tools that comes with which uses gcc to compile, however AMBER10 requires either g95 or gfortran to compile. This is where the issue lies, i have installed both... (0 Replies)
Hi !
I have one program made of several sub programs which I am trying to compile with gfortran on Fedora 14 in my system. The program was originally written in Fortran 77 and compilation command used to be -
fort77 -O2 -f -w -o life life_com.f lifetime.f minuit.f tek_life.f utilities.f... (0 Replies)
Question 1:
I have a c++ project that I am trying to re-organize. I am trying to subdivide the src directory to move some src files that seldom are changed to a more out of the way location. The project is a c++ application with a fortran function called from the c.
The reorganization went... (9 Replies)
Hi,
I am trying to run a simple f77 program on gfortran. Program is as follows.
program trial
implicit real*8 (a-h,o-z)
common/var/a(2),b,c(4),d
a=(/0,0/)
b=0
c=(/0,0,0,0/)
d=0
call add(a,b,c,d)
... (1 Reply)
I am a INTEL fortran user recently migrated to linux and installed gfortran on my system.
I run numerical models as part of my research.
my question is on optimization of the fortran code.
I used the - vectorize option to compile for reducing the run time considerably and was happy. But... (1 Reply)
Hello everyone,
I'm trying since a few days to compile a f90 program with gfortran (on Ubuntu) with a makefile. The fortran program calls 2 routines written in C.
Here is my makefile:
FC = gfortran
SFC = gfortran
FFLAGS = -ffree-form -O... (21 Replies)
I have code that works fine in ifort. But when trying to run on gfortran 4.7.1 (which does support quads and has no problem with real * 16) I can't cast an integer variable to a quad precision float (real*16) using something like:
factq(i) = factq(i-1) * qfloat(i)
Finding a list of the new... (2 Replies)
Hello
I am using gfortran and I intended to do thiis:
Module variables
character(len=:), dimension(:), allocatable, array
end module variables
Sub test
use variables
integer (max_len)
max_len=len_trim("something here")
if(.not.allocated(array))... (1 Reply)
Hi, I am having a problem compiling a program with gfortran. The program compiles with g77 and f77 but I don't have those. I edited the makefile from FC = g77 to FC = gfortran but when I run it I get a slew of undefined reference errors. Any suggestions? (8 Replies)
Hi all,
I'm a new Linux and gfortran user so facing this problem I could not figure out how to proceed. Trying to install a program with a makefile, at some point the installation stops showing the following error:
g++ -std=c++0x -O3 -o CAMILObash.exe ./objects/Class_SurfTri_CheckTools.o... (2 Replies)
Discussion started by: Jefferson_dhv
2 Replies
LEARN ABOUT LINUX
edata
END(3) Linux Programmer's Manual END(3)NAME
etext, edata, end - end of program segments
SYNOPSIS
extern etext;
extern edata;
extern end;
DESCRIPTION
The addresses of these symbols indicate the end of various program segments:
etext This is the first address past the end of the text segment (the program code).
edata This is the first address past the end of the initialized data segment.
end This is the first address past the end of the uninitialized data segment (also known as the BSS segment).
CONFORMING TO
Although these symbols have long been provided on most Unix systems, they are not standardized; use with caution.
NOTES
The program must explicitly declare these symbols; they are not defined in any header file.
On some systems the names of these symbols are preceded by underscores, thus: _etext, _edata, and _end. These symbols are also defined for
programs compiled on Linux.
At the start of program execution, the program break will be somewhere near &end (perhaps at the start of the following page). However,
the break will change as memory is allocated via brk(2) or malloc(3). Use sbrk(2) with an argument of zero to find the current value of
the program break.
EXAMPLE
When run, the program below produces output such as the following:
$ ./a.out
First address past:
program text (etext) 0x8048568
initialized data (edata) 0x804a01c
uninitialized data (end) 0x804a024
Program source
#include <stdio.h>
#include <stdlib.h>
extern char etext, edata, end; /* The symbols must have some type,
or "gcc -Wall" complains */
int
main(int argc, char *argv[])
{
printf("First address past:
");
printf(" program text (etext) %10p
", &etext);
printf(" initialized data (edata) %10p
", &edata);
printf(" uninitialized data (end) %10p
", &end);
exit(EXIT_SUCCESS);
}
SEE ALSO objdump(1), readelf(1), sbrk(2), elf(5)COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2008-07-17 END(3)