math/lapack fails to build with PROFILE=on.

It fails with the following error:
[...]
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c slatm3.f -o slatm3.o
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c slatm5.f -o slatm5.o
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c slatm6.f -o slatm6.o
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c slatm7.f -o slatm7.o
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c slahilb.f -o slahilb.o
/usr/local/bin/ld: //usr/lib/libc_p.a(sbrk.po): undefined reference to symbol '_
end'
//lib/libc.so.7: error adding symbols: DSO missing from command line
collect2: ld returned 1 exit status
*** [testslamch] Error code 1
/usr/local/bin/ld: //usr/lib/libc_p.a(sbrk.po): undefined reference to symbol '_
end'
//lib/libc.so.7: error adding symbols: DSO missing from command line
collect2: ld returned 1 exit status
/usr/local/bin/ld: //usr/lib/libc_p.a(sbrk.po): undefined reference to symbol '_
end'
//lib/libc.so.7: error adding symbols: DSO missing from command line
collect2: ld returned 1 exit status
*** [testdsecnd] Error code 1
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c clatms.f -o clatms.o
*** [testlsame] Error code 1
/usr/local/bin/ld: //usr/lib/libc_p.a(sbrk.po): undefined reference to symbol '_
end'
/usr/local/bin/ld: //usr/lib/libc_p.a(sbrk.po): undefined reference to symbol '_
end'
//lib/libc.so.7: error adding symbols: DSO missing from command line
//lib/libc.so.7: error adding symbols: DSO missing from command line
collect2: ld returned 1 exit status
collect2: ld returned 1 exit status
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c clatme.f -o clatme.o
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c clatmr.f -o clatmr.o
*** [testdlamch] Error code 1
*** [testsecond] Error code 1
5 errors
*** [lapack_install] Error code 2
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c clatmt.f -o clatmt.o
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c clagge.f -o clagge.o
[...]
gfortran46 -O0 -pg -c dlaran.f
gfortran46 -O -Wl,-rpath=/usr/local/lib/gcc46 -pg -c dlarnd.f -o dlarnd.o
/usr/local/bin/ar cr ../../libtmglib.a slatms.o slatme.o slatmr.o slatmt.o  slag
ge.o slagsy.o slakf2.o slarge.o slaror.o slarot.o slatm2.o  slatm3.o slatm5.o sl
atm6.o slatm7.o slahilb.o clatms.o clatme.o clatmr.o clatmt.o  clagge.o claghe.o
 clagsy.o clakf2.o clarge.o claror.o clarot.o  clatm1.o clarnd.o clatm2.o clatm3
.o clatm5.o clatm6.o clahilb.o slatm1.o slaran.o slarnd.o dlatms.o dlatme.o dlat
mr.o dlatmt.o  dlagge.o dlagsy.o dlakf2.o dlarge.o dlaror.o dlarot.o dlatm2.o  d
latm3.o dlatm5.o dlatm6.o dlatm7.o dlahilb.o zlatms.o zlatme.o zlatmr.o zlatmt.o
  zlagge.o zlaghe.o zlagsy.o zlakf2.o zlarge.o zlaror.o zlarot.o  zlatm1.o zlarn
d.o zlatm2.o zlatm3.o zlatm5.o zlatm6.o zlahilb.o        dlatm1.o dlaran.o dlarn
d.o
/usr/local/bin/ranlib ../../libtmglib.a
1 error
*** [build-profile] Error code 2

Stop in /usr/ports/math/lapack.
*** [build] Error code 1

Stop in /usr/ports/math/lapack.

Fix: 

Set PROFILE=off.
How-To-Repeat: Set PROFILE=on; then: make