| 1 | The following instructions assume that you already set up Cygwin/Msys |
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| 2 | to know about the Microsoft 'cl' compiler and 'nmake'. |
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| 3 | |
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| 4 | 1. Download the f2c.exe Fortran to C compiler from netlib from |
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| 5 | |
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| 6 | http://www.netlib.org/f2c/mswin/f2c.exe.gz |
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| 7 | |
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| 8 | uncompress it, and put it somewhere in your PATH (e.g. into |
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| 9 | /usr/local/bin). Make sure it is executable. |
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| 10 | |
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| 11 | 2. Download the source code for the f2c runtime library from |
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| 12 | |
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| 13 | http://www.netlib.org/f2c/libf2c.zip |
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| 14 | |
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| 15 | and put it into a directory in which you want to have a subdirectory |
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| 16 | where you want to have the subdirectory "libf2c" containing the |
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| 17 | runtime library, e.g., into /usr/local/lib. Uncompress this file, |
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| 18 | for example by "unzip libf2c.zip" in a Cygwin or MSys window. |
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| 19 | |
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| 20 | 3. Compile the Fortran runtime library: |
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| 21 | |
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| 22 | In the source directory (libf2c), type 'nmake -f makefile.vc all' |
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| 23 | |
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| 24 | If you encounter an error during the compilation of "err.c" due to |
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| 25 | a missing unistd.h, edit the makefile.vc file and add -DNO_ISATTY |
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| 26 | to the CFLAGS (line 9). |
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| 27 | |
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| 28 | If you encounter an error during the compilation of "arithchk.c" |
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| 29 | (involving the "comptry.bat" file), edit the makefile.vc file and |
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| 30 | delete the word "comptry.bat" in the 4th from last line. |
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| 31 | |
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| 32 | NOTE: If you want to generate debug code (using --enable-debug with |
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| 33 | configure), you need to change the makefile.vc file: Change the |
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| 34 | definition of CFLAGS so that it no longer contains '-Ot1' but |
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| 35 | '-MTd' instead. |
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| 36 | |
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| 37 | 4. Edit the script "compile_f2c" in this directory so that the |
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| 38 | variable "f2clibdir" at the beginning is set to the directory |
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| 39 | containing the libf2c runtime library. (If you installed it in |
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| 40 | /usr/local/lib as suggested above, it is already defined correctly.) |
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| 41 | |
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| 42 | 5. Put the compile_f2c script somewhere into your path, e.g., into |
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| 43 | /usr/local/bin - make sure it is executable. |
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| 44 | |
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| 45 | 6. To test it, copy the lines at the end of this file into a Fortran |
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| 46 | source file (say, bla.f), and type |
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| 47 | |
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| 48 | compile_f2c -o f2ctest bla.f |
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| 49 | |
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| 50 | Running the executable f2ctest.exe hopefully makes you happy. |
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| 51 | |
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| 52 | ---------------------- 8< ---------------- |
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| 53 | |
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| 54 | program test |
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| 55 | write (*,*) "It works!" |
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| 56 | end |
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