Note: Article to compile GAMIT/GLOBK v10.3.x on Mac PPC & Intel here. It’s much easier now to compile.
GAMIT and GLOBK are a comprehensive suite of programs for analyzing GPS measurements primarily to study crustal deformation.This page is a resource to compile and install GAMIT/GLOBK for Mac OS X.
Installation instructions for GAMIT/GLOBK 10.21 (PowerPC)
Software Requirements:
- Apple XCode development environment (Xcode 2.4.1 for Mac OS X 10.4.x)
- Apple X11 installed in /Applications/Utilites (from your Mac OSX Install DVD/CD)
- A FORTRAN compiler customized GNU Fortran g77 (do not use Fink’s g77 in /sw/bin/)
- A user with ‘Admin’ rights
We first need to install Apple’s XCode development environment, then build a customized GNU77 Fortran, edit some GAMIT/GLOBK config files to get a succesful compilation.
Apple XCode installation
- Download and install the latest Apple XCode development environment (free registration required) from Apple’s Developer Connection website.
- Open ‘Terminal’ (from /Applications/Utilities/)
Built a customized GNU77 FORTRAN compiler (for PowerPC Macs only !!!)
This process is necessary as the default version of gcc/g77 only allows a maximum unit number (MXUNIT) of 99, while GLOBK requires a MXUNIT of 9999.Create the installation directory for your FORTRAN compiler:
% mkdir /usr/local/g77
Download gcc version 3.4.6 (latest version in the 3.4 tree)
ftp://ftp.gnu.org/pub/gnu/gcc/gcc-3.4.6/gcc-3.4.6.tar.gz
Unzip and untar the source in your download directory:
% tar -xvfz gcc-3.4.6.tar.gz
%cd gcc-3.4.6
Increase g77 MXUNIT to 10000
Modify libI77/fio.h fortran include file to allow access to 10000 unit numbers :
% vi libf2c/libI77/fio.h
Replace line:
#define MXUNIT 100
With line:
#define MXUNIT 10000
Make the build directory and run configure:
% mkdir objdir
% cd objdir
% ../configure –prefix=/usr/local/g77/
Build GCC/G77
% make
Install GCC/G77
% make install
The executables/binaries are now installed in the directory /usr/local/g77/bin/
Download and install GAMIT/GLOBK
Now that you have installed the FORTRAN compiler, download the source files, request your download form here.
Create a directory in /usr/local/gamit with:
%sudo mkdir /usr/local/gamit
%cd /usr/local/gamit
Download GAMIT sources via ftp. Ftp server address provided by the request form.Change ‘install_software’ and ‘install_updates’ as executables:
%chmod ug+rx /usr/local/gamit/install*
Launch ‘install_software’ to decompress all the *.tar files:
%./install_software
Just say “yes” to decompress com.10.21.tar.Z etc. and for X11 PATH.
Now that all the files are decompressed we can replace ‘com/unimake‘ and ‘libraries/Makefile.config‘ with the new ones.
Install updated ‘unimake’ & ‘Makefile.config’ for Mac OS X
- Download unimake.gz
- Decompress it with command:
- #gunzip unimake.gz and move it to /usr/local/gamit/com/
- Download Makefile.config.gz
- Decompress it with command:
- #gunzip Makefile.config and move it to /usr/local/gamit/libraries
Restart ‘./install_software’ again, and it should compile and install fine.
Stop here! If you want to get the big picture of what has been changed:
Edit libraries/Makefile.config
1. Change OS_ID number for Darwin
If it stops after a few seconds with error message:
OSID Darwin 8700 not found in Makefile.config – remove Makefile and STOP Failure in make_gamit — install_software terminated,
then we need to edit libraries/Makefile.config and change the line 329 from:
OS_ID Darwin 5200 8500
to
OS_ID Darwin 5200 9900
so it will compile correctly for the next MacOSX versions up to OSX 10.5.9 
Note: You get the OS_ID number with command ‘uname -a’, e.g:Mac OS X version 10.4.7 is 8.7.0
2. Remove optimization options -O3
Remove the optimization options -O3 or else we will get errors compiling ‘glorg’ in directory ‘kf’.
The section of ‘OS_ID Darwin’ should look like this:
#—— for Mac OSX 10.2 til Mac OSX 10.5.9—–
OS_ID Darwin 5200 9900
# ASSIGMENTS — removed optimization “-O3 -Wuninitialized” or else problems compiling “kf/glorg”
FFLAGS = -Wunused -Wimplicit -fno-f2c -fno-automatic -fno-backslash -Wno-globals -fno-globals
# Fortran compiler it points to
FTN = /usr/local/g77/bin/g77
CFLAGS = -g
CC = gcc
# EXPLICIT_RULESranlib THELIB
# SUFFIX_RULES.c.a:$(CC) -c $(CFLAGS) -I$(II) $< ar rv $@ *.orm -f $*.o.f.a:$(FTN) -c $(FFLAGS) $<ar rv $@ *.orm -f $*.o# BLOCKEND
3. Change absolute PATH of your customized g77
Change also the line 333 of FTN to have the absolute PATH for g77 binary (in section ‘OS_ID Darwin’)
FTN = /usr/local/g77/bin/g77
If you restart again ‘./install_software’, after a while you will get the following error message:
/usr/bin/ld: Undefined symbols:_printf$LDBLStub_scanf
$LDBLStubcollect2: ld returned 1 exit statusmake: *** [makex] Error 1
Then we need to edit the file com/unimake
Edit com/unimake
To compile correctly we just need to append the ‘-lSystemStubs’ library to ‘com/unimake’.
Change lines 342 to 345 from ‘com/unimake’ (after ‘if ( $mainext == ‘f’ ) then” to:
if ( $os[1] == ‘Darwin’ ) then
#echo “Darwin”
echo ” #(FTN) #(FFLAGS) $mainfull $libnam #(SLIB) -L#(X11LIB) -lX11 -o $execs[$i]$ext -lSystemStubs” | tr ‘#’ ‘$’ >> Makefile
else
echo ” #(FTN) #(FFLAGS) $mainfull $libnam #(SLIB) -L#(X11LIB) -lX11 -o $execs[$i]$ext ” | tr ‘#’ ‘$’ >> Makefile
endif # Darwin
else if ( $mainext == ‘c’ ) then
echo ” #(CC) #(CFLAGS) $mainfull -L#(X11LIB) -lX11 -o $execs[$i]$ext ” | tr ‘#’ ‘$’ >> Makefile
endif
elseif ( $mainext == ‘f’ ) then
if ( $os[1] == ‘Darwin’ ) then #echo “Darwin2″
echo ” #(FTN) #(FFLAGS) $mainfull $libnam #(SLIB) -o $execs[$i]$ext -lSystemStubs” | tr ‘#’ ‘$’ >> Makefile
else
echo ” #(FTN) #(FFLAGS) $mainfull $libnam #(SLIB) -o $execs[$i]$ext ” | tr ‘#’ ‘$’ >> Makefile
endif # Darwin
Relaunch install_software
Launch install_software again, and it should compile fine.
