Installation problem with OpenMx 1.1.1 with R 2.13.1 in Fedora 15

My guess is that Fedora 15 uses gcc4.6 while OpenMx comes with gcc4.4. The following is the error message:
checking for inst/npsol/linux/x86/gcc4.6/libnpsol.a... no
configure: error: npsol library not found
ERROR: configuration failed for package ‘OpenMx’

The workaround that I used was unzipping OpenMx into a folder and copy gcc4.4/libnpsol.a to gcc4.6/libnpsol.a. Then I could install it from the OpenMx folder or its zipped file. It worked for the previous versions of OpenMx.

I used the same trick for OpenMx 1.1.1 but failed with the following error message:
checking for inst/npsol/linux/x86/gcc4.6/libnpsol.a... yes
configure: creating ./config.status
config.status: creating src/Makevars
config.status: executing src/omxSymbolTable.h commands
config.status: executing src/omxSymbolTable.c commands
** libs
gcc -m32 -std=gnu99 -I/usr/include/R -I/usr/local/include -Wall -mmacosx-version-min=10.4 -fpic -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables -c merge.c -o merge.o
cc1: error: unrecognized command line option ‘-mmacosx-version-min=10.4’
make: *** [merge.o] Error 1
ERROR: compilation failed for package ‘OpenMx’

I have the same error in another computer with a 64 bit Fedora 15. Any suggestions? Thanks in advance.

Mike

> R.Version()
$platform
[1] "i386-redhat-linux-gnu"

$arch
[1] "i386"

$os
[1] "linux-gnu"

$system
[1] "i386, linux-gnu"

$status
[1] ""

$major
[1] "2"

$minor
[1] "13.1"

$year
[1] "2011"

$month
[1] "07"

$day
[1] "08"

$`svn rev`
[1] "56322"

$language
[1] "R"

$version.string
[1] "R version 2.13.1 (2011-07-08)"