MEX fortran file using Gnumex and MinGW (g77) - matlab

Question

There is a problem that I ran into recently. It used to be working fine as far as I remember but after a few week I am trying again to MEX a fortran 77 file in MATLAB but it is giving me a weird error.
Ok, I made the MEX options file using Gnumex which is named mexopts_f77.bat.
This is the command that I run in MATLAB:
mex -v -f C:\Omid\Other\Gnumex\mexopts_f77.bat -c sodex.f decsol.f
And this is the the error that I get:
-> Options file specified on command line
----------------------------------------------------------------
-> Options file = C:\Omid\Other\Gnumex\mexopts_f77.bat
MATLAB = C:\PROGRA~2\MATLAB\R2011b
-> COMPILER = gcc
-> Compiler flags:
COMPFLAGS = -c -DMATLAB_MEX_FILE -fcase-upper -fnounderscoring
OPTIMFLAGS = -O0
DEBUGFLAGS = -g
arguments =
Name switch = -o
-> Pre-linking commands =
-> LINKER = C:\PROGRA~2\MATLAB\R2011b\sys\perl\win32\bin\perl.exe C:\omid\other\gnumex\linkmex.pl
-> Link directives:
LINKFLAGS = -LC:\Omid\Other\Gnumex\libs
LINKDEBUGFLAGS = -g -Wl,--image-base,0x28000000\n
LINKFLAGSPOST =
Name directive = -o sodex.mexw32
File link directive =
Lib. link directive =
Rsp file indicator =
-> Resource Compiler = C:\PROGRA~2\MATLAB\R2011b\sys\perl\win32\bin\perl.exe C:\omid\other\gnumex\rccompile.pl -o mexversion.res
-> Resource Linker =
----------------------------------------------------------------
--> gcc -c -DMATLAB_MEX_FILE -fcase-upper -fno-underscoring -osodex.obj -O0 -DMX_COMPAT_32 sodex.f
gcc: error: unrecognized command line option '-fcase-upper'
C:\PROGRA~2\MATLAB\R2011B\BIN\MEX.PL: Error: Compile of 'sodex.f' failed.
I think the problem is with -fcase-upper option. I looked it up but could not find any information regrading that option for gcc.
Edit:
I manually changed gcc to g77 in my options file and was successful to create the object files but still getting an error in the final step where I try to link the object files to the main fortran script named vdpsodex.F and create the MEX file. As requested, I am including the option file:
#echo off
rem C:\Omid\Other\Gnumex\mexopts_f77.bat
rem Generated by gnumex.m script in C:\omid\other\gnumex
rem gnumex version: 2.06
rem Compile and link options used for building MEX etc files with
rem the Mingw/Cygwin tools. Options here are:
rem Gnumex, version 2.06
rem MinGW linking
rem Mex (*.dll) creation
rem Libraries regenerated now
rem Language: Fortran 77
rem Optimization level: -O0 (no optimization)
rem StorageVersion: 1.0
rem C++keyName: GNU C++
rem C++keyManufacturer: GNU
rem C++keyLanguage: C++
rem C++keyVersion:
rem C++keyFileName: GNUMEXOPTS.bat
rem Matlab version 7.13
rem
set GCCINSTALLDIR=C:\Omid\Other\MinGW\bin
set MATLAB=C:\PROGRA~2\MATLAB\R2011b
set GM_PERLPATH=C:\PROGRA~2\MATLAB\R2011b\sys\perl\win32\bin\perl.exe
set GM_UTIL_PATH=C:\omid\other\gnumex
set PATH=C:\Omid\Other\MinGW\bin;%PATH%
set PATH=%PATH%;C:\Cygwin\usr\local\gfortran\libexec\gcc\i686-pc-cygwin\4.3.0
set LIBRARY_PATH=C:\Omid\Other\MinGW\lib
set G95_LIBRARY_PATH=C:\Omid\Other\MinGW\lib
set MW_TARGET_ARCH=win32
rem
rem precompiled library directory and library files
set GM_QLIB_NAME=C:\Omid\Other\Gnumex\libs
rem
rem directory for .def-files
set GM_DEF_PATH=C:\Omid\Other\Gnumex\libs
rem
rem Type of file to compile (mex or engine)
set GM_MEXTYPE=mex
rem
rem Language for compilation
set GM_MEXLANG=f77
rem
rem File for exporting mexFunction symbol
set GM_MEXDEF=C:\Omid\Other\Gnumex\libs\fmex.def
rem
set GM_ADD_LIBS=-lg2c -lflibmx -lflibmex -lflibmat
rem
rem compiler options; add compiler flags to compflags as desired
set NAME_OBJECT=-o
rem ************ This is where I replaced gcc with g77 ************
set COMPILER=g77
rem ***************************************************************
set COMPFLAGS=-c -DMATLAB_MEX_FILE -fcase-upper -fno-underscoring
set OPTIMFLAGS=-O0
set DEBUGFLAGS=-g
rem
rem NB Library creation commands occur in linker scripts
rem but LIBLOC is provided for compatibility with
rem mex.getCompilerConfigurations
rem
rem Linker parameters
set LIBLOC=
set LINKER=%GM_PERLPATH% %GM_UTIL_PATH%\linkmex.pl
set LINKFLAGS=
set LINKOPTIMFLAGS=-s
set LINKDEBUGFLAGS=-g -Wl,--image-base,0x28000000\n
set LINKFLAGS= -LC:\Omid\Other\Gnumex\libs
set LINK_FILE=
set LINK_LIB=
set NAME_OUTPUT=-o %OUTDIR%%MEX_NAME%.mexw32
rem
rem Resource compiler parameters
set RC_COMPILER=%GM_PERLPATH% %GM_UTIL_PATH%\rccompile.pl -o %OUTDIR%mexversion.res
set RC_LINKER=
Now the above code does give me the object files but when I try to make the final MEX file using below command:
mex -v -f C:\Omid\Other\Gnumex\mexopts_f77.bat vdpsodex.F sodex.obj decsol.obj
it gives me the following error:
-> Options file specified on command line
----------------------------------------------------------------
-> Options file = C:\Omid\Other\Gnumex\mexopts_f77.bat
MATLAB = C:\PROGRA~2\MATLAB\R2011b
-> COMPILER = g77
-> Compiler flags:
COMPFLAGS = -c -DMATLAB_MEX_FILE -fcase-upper -fno-underscoring
OPTIMFLAGS = -O0
DEBUGFLAGS = -g
arguments =
Name switch = -o
-> Pre-linking commands =
-> LINKER = C:\PROGRA~2\MATLAB\R2011b\sys\perl\win32\bin\perl.exe C:\omid\other\gnumex\linkmex.pl
-> Link directives:
LINKFLAGS = -LC:\Omid\Other\Gnumex\libs
LINKDEBUGFLAGS = -g -Wl,--image-base,0x28000000\n
LINKFLAGSPOST =
Name directive = -o vdpsodex.mexw32
File link directive =
Lib. link directive =
Rsp file indicator =
-> Resource Compiler = C:\PROGRA~2\MATLAB\R2011b\sys\perl\win32\bin\perl.exe C:\omid\other\gnumex\rccompile.pl -o mexversion.res
-> Resource Linker =
----------------------------------------------------------------
--> g77 -c -DMATLAB_MEX_FILE -fcase-upper -fno-underscoring -oC:\Users\GHASEM~1\AppData\Local\Temp\2\mex_7FJjxb\vdpsodex.obj -O0 -DMX_COMPAT_32 vdpsodex.F
--> C:\PROGRA~2\MATLAB\R2011b\sys\perl\win32\bin\perl.exe C:\omid\other\gnumex\linkmex.pl -o vdpsodex.mexw32 -LC:\Omid\Other\Gnumex\libs -s C:\Users\GHASEM~1\AppData\Local\Temp\2\mex_7FJjxb\vdpsodex.obj sodex.obj decsol.obj
C:\Omid\Other\Gnumex\libs/flibmx.lib(ds00068.o):(.idata$7+0x0): undefined reference to `_head_C__Omid_Other_Gnumex_libs_flibmx_lib'
C:\Omid\Other\Gnumex\libs/flibmx.lib(ds00086.o):(.idata$7+0x0): undefined reference to `_head_C__Omid_Other_Gnumex_libs_flibmx_lib'
C:\Omid\Other\Gnumex\libs/flibmx.lib(ds00062.o):(.idata$7+0x0): undefined reference to `_head_C__Omid_Other_Gnumex_libs_flibmx_lib'
C:\Omid\Other\Gnumex\libs/flibmx.lib(ds00157.o):(.idata$7+0x0): undefined reference to `_head_C__Omid_Other_Gnumex_libs_flibmx_lib'
C:\Omid\Other\Gnumex\libs/flibmx.lib(ds00161.o):(.idata$7+0x0): undefined reference to `_head_C__Omid_Other_Gnumex_libs_flibmx_lib'
collect2: ld returned 1 exit status
link command: g77 -shared C:\Omid\Other\Gnumex\libs\fmex.def -o vdpsodex.mexw32 -LC:\Omid\Other\Gnumex\libs -s C:\Users\GHASEM~1\AppData\Local\Temp\2\mex_7FJjxb\vdpsodex.obj sodex.obj decsol.obj -lg2c -lflibmx -lflibmex -lflibmat
C:\PROGRA~2\MATLAB\R2011B\BIN\MEX.PL: Error: Link of 'vdpsodex.mexw32' failed.

Answer 1

emphasized textFinally, I was able to pin point the issue and I thought it might be beneficial to others who may be facing the same issue (or similar to this one) to share the answer. Let me just mention that it was looking strange to me at the first place because I had MEX'ed the exact same files using an option files created by Gnumex and had not problem at all. I just noticed that because I changed my MinGW build a while ago I was not able to MEX the same Fortran files anymore even though I re-created the options file (mexopts_f77.bat).
Anyways, to make the long story short I found this link very useful. Basically, it suggests downloading five packages and extracting them to the root directory of MinGw. Four of those links are still alive. One of them is dead but I found it by Googling the package name. What you see below is the updated links of the packages.
Last but not least, here is the solution if your g77 is not working with a Gnumex-made options file:
Download following packages:
binutils-2.19.1-mingw32-bin.tar.gz
gcc-core-3.4.5-20060117-3.tar.gz
gcc-g77-3.4.5-20060117-3.tar.gz
mingw-runtime-3.14.tar.gz
w32api-3.11.tar.gz
Extract them to your MinGW root directory, e.g. C:\MinGW
Re-make your options file by selecting Fortran 77 as compilation language, e.g. mexopt_f77.bat
MEX you Fortran script using following syntax.
mex -f [options-file] [fortran-file.f]
If you need to link some files to the main script then you have to compile them first to object files and then link them.
mex -f [options-file] -c [linkfile1.f] [linkfile2.f]
mex -f [options-file] [fortran-file.f] [linkfile1.obj] [linkfile2.obj]