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I posted a query about this some time back and now I've been reminded it 
  never got resolved.  Google just finds my original query here and 
SunSolve is comatose yet again.

I can link w/ -m32 from a library, but not w/ -m64.  The latter results 
in failures to find the library members.

This is Solaris 10 U6 x86 w/ Studio 12 on an Ultra 20.  Does anyone have 
any suggestions?  I searched SunSolve when I ran into this the first 
time, but can't recall what I did after that.

Thanks,
Reg

Here's a console log and example code to demonstrate the problem:

==> console.log <==

sun_x86%rhb {156} make clean
rm -f *.o *.a tst_a tst_b
sun_x86%rhb {157} make CFLAGS=-m32
cc -m32   -c -o foo.o foo.c
cc -m32   -c -o bar.o bar.c
cc -m32 -o tst_a tst.c foo.o bar.o
ar crv libfoo.a foo.o bar.o
a - foo.o
a - bar.o
ranlib libfoo.a
cc -m32 -o tst_b tst.c libfoo.a
sun_x86%rhb {158} make clean
rm -f *.o *.a tst_a tst_b
sun_x86%rhb {159} make CFLAGS=-m64
cc -m64   -c -o foo.o foo.c
cc -m64   -c -o bar.o bar.c
cc -m64 -o tst_a tst.c foo.o bar.o
ar crv libfoo.a foo.o bar.o
a - foo.o
a - bar.o
ranlib libfoo.a
cc -m64 -o tst_b tst.c libfoo.a
Undefined                       first referenced
  symbol                             in file
foo                                 tst.o
ld: fatal: Symbol referencing errors. No output written to tst_b
make: *** [tst_b] Error 1
sun_x86%rhb {160} uname -a
SunOS u20 5.10 Generic_137112-02 i86pc i386 i86pc
sun_x86%rhb {161} isainfo -kv
64-bit amd64 kernel modules
sun_x86%rhb {162} cc -V
cc: Sun C 5.9 SunOS_i386 Patch 124868-05 2008/05/13
usage: cc [ options] files.  Use 'cc -flags' for details
sun_x86%rhb {163} ld -V
ld: Software Generation Utilities - Solaris Link Editors: 5.10-1.489


==> Makefile <==

all: tst_a tst_b

libfoo.a : foo.o bar.o
         ar crv libfoo.a foo.o bar.o
         ranlib libfoo.a

tst_a : tst.c foo.o bar.o
         $(CC) $(CFLAGS) -o tst_a tst.c foo.o bar.o

tst_b : tst.o libfoo.a
         $(CC) $(CFLAGS) -o tst_b tst.c libfoo.a

clean:
         rm -f *.o *.a tst_a tst_b

==> bar.c <==

#include <stdio.h>

void bar(){

    printf( "bar\n" );

}

==> foo.c <==


void foo( int n, float* a ){

    int i;

    for( i=0; i<n; i++ ){

       a[i] *= a[i];
    }
}

==> tst.c <==

#include <stdio.h>

void foo( int n ,float* a );
void bar( void );

int main(){

    int i;
    int n = 256;

    float a[256];

    for( i=0; i<n; i++ ){
       a[i] = i;
    }

    printf( "%f \n" ,a[64] );

    foo( n ,a );

    printf( "%f \n" ,a[64] );

    bar();

}

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==> console.log <==

sun_x86%rhb {156} make clean
rm -f *.o *.a tst_a tst_b
sun_x86%rhb {157} make CFLAGS=-m32
cc -m32   -c -o foo.o foo.c
cc -m32   -c -o bar.o bar.c
cc -m32 -o tst_a tst.c foo.o bar.o
ar crv libfoo.a foo.o bar.o
a - foo.o
a - bar.o
ranlib libfoo.a
cc -m32 -o tst_b tst.c libfoo.a
sun_x86%rhb {158} make clean
rm -f *.o *.a tst_a tst_b
sun_x86%rhb {159} make CFLAGS=-m64
cc -m64   -c -o foo.o foo.c
cc -m64   -c -o bar.o bar.c
cc -m64 -o tst_a tst.c foo.o bar.o
ar crv libfoo.a foo.o bar.o
a - foo.o
a - bar.o
ranlib libfoo.a
cc -m64 -o tst_b tst.c libfoo.a
Undefined                       first referenced
 symbol                             in file
foo                                 tst.o
ld: fatal: Symbol referencing errors. No output written to tst_b
make: *** [tst_b] Error 1
sun_x86%rhb {160} uname -a
SunOS u20 5.10 Generic_137112-02 i86pc i386 i86pc
sun_x86%rhb {161} isainfo -kv
64-bit amd64 kernel modules
sun_x86%rhb {162} cc -V
cc: Sun C 5.9 SunOS_i386 Patch 124868-05 2008/05/13
usage: cc [ options] files.  Use 'cc -flags' for details



==> Makefile <==

all: tst_a tst_b

libfoo.a : foo.o bar.o
	ar crv libfoo.a foo.o bar.o
	ranlib libfoo.a

tst_a : tst.c foo.o bar.o
	$(CC) $(CFLAGS) -o tst_a tst.c foo.o bar.o

tst_b : tst.o libfoo.a
	$(CC) $(CFLAGS) -o tst_b tst.c libfoo.a

clean:
	rm -f *.o *.a tst_a tst_b

==> bar.c <==

#include <stdio.h>

void bar(){

   printf( "bar\n" );

}

==> foo.c <==


void foo( int n, float* a ){

   int i;

   for( i=0; i<n; i++ ){

      a[i] *= a[i];
   }
}

==> tst.c <==

#include <stdio.h>

void foo( int n ,float* a );
void bar( void );

int main(){

   int i;
   int n = 256;

   float a[256];

   for( i=0; i<n; i++ ){
      a[i] = i;
   }

   printf( "%f \n" ,a[64] );

   foo( n ,a );

   printf( "%f \n" ,a[64] );

   bar();

}

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