[Help-glpk] GLPK installation problem on Linux with Matlab (recompile with -fPIC)

[Dou, Yimeng]

Hi there,

 

We got a message like this when trying to install GLPK on a
Linux server that has Matlab running on it. We actually went into the Makefile,
and added  #8211;fPIC flag to the CPP flags, but when we tried to execute  
#8220;makeglpkmex #8221;
Matlab still reported these same errors.  The output of the  #8220;make #8221;
process actually seemed like they were using the  #8211;fPIC flag #8230;so we
are really confused. Could you please help? Any idea is highly appreciated.

 

 

/usr/bin/ld:
/home/matlab/glpk/glpk-4.38/lib/libglpk.a(glpapi01.o):

relocation R_X86_64_32 against `a local symbol' can not be
used when

making a shared object; recompile with -fPIC

/home/matlab/glpk/glpk-4.38/lib/libglpk.a: could not read
symbols: Bad

value

collect2: ld returned 1 exit status

 

    mex: link of ' "glpkcc.mexa64"'
failed.

 

??? Error using ==> mex at 213

Unable to complete successfully.

 

Error in ==> makeglpkmex at 111

eval(['mex ' cmd]);

 

 

 

And Here are the modifications we #8217;ve done to the CPP
flags:

 

CC = gcc -fPIC

CCDEPMODE = depmode=gcc3

CFLAGS = -g -O2

CPP = gcc -EfPIC

CPPFLAGS = -fPIC

 

The  #8220;make #8221; process outputs something like this,
so you see the added  #8211;fPIC is there. 

libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -I./../include -g -O2 -MT 
glpapi01.lo -MD -MP -MF
.deps/glpapi01.Tpo -c glpapi01.c  -fPIC -DPIC -o .libs/glpapi01.o

 

This line also mentions gcc, but it is without the  #8211;fPIC
flag. Could this be the reason?

libtool: link:  gcc -shared  .libs/glpapi01.o
.libs/glpapi02.o .libs/glpapi03.o .libs/glpapi04.o .libs/glpapi05.o
.libs/glpapi06.o .libs/glpapi07.o .libs/glpapi08.o

 

 

 

Thanks,

 

Yimeng

Hi there,

 

We got a message like this when trying to install GLPK on a Linux server that has Matlab running on it. We actually went into the Makefile, and added –fPIC flag to the CPP flags, but when we tried to execute “makeglpkmex” Matlab still reported these same errors.  The output of the “make” process actually seemed like they were using the –fPIC flag…so we are really confused. Could you please help? Any idea is highly appreciated.

 

 

/usr/bin/ld: /home/matlab/glpk/glpk-4.38/lib/libglpk.a(glpapi01.o):

relocation R_X86_64_32 against `a local symbol' can not be used when

making a shared object; recompile with -fPIC

/home/matlab/glpk/glpk-4.38/lib/libglpk.a: could not read symbols: Bad

value

collect2: ld returned 1 exit status

 

    mex: link of ' "glpkcc.mexa64"' failed.

 

??? Error using ==> mex at 213

Unable to complete successfully.

 

Error in ==> makeglpkmex at 111

eval(['mex ' cmd]);

 

 

 

And Here are the modifications we’ve done to the CPP flags:

 

CC = gcc -fPIC

CCDEPMODE = depmode=gcc3

CFLAGS = -g -O2

CPP = gcc -EfPIC

CPPFLAGS = -fPIC

 

The “make” process outputs something like this, so you see the added –fPIC is there.

libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -I./../include -g -O2 -MT glpapi01.lo -MD -MP -MF .deps/glpapi01.Tpo -c glpapi01.c  -fPIC -DPIC -o .libs/glpapi01.o

 

This line also mentions gcc, but it is without the –fPIC flag. Could this be the reason?

libtool: link:  gcc -shared  .libs/glpapi01.o .libs/glpapi02.o .libs/glpapi03.o .libs/glpapi04.o .libs/glpapi05.o .libs/glpapi06.o .libs/glpapi07.o .libs/glpapi08.o

 

 

 

Thanks,

 

Yimeng