Use pkg-config to detect BLAS/LAPAACK libs

(Portage version: 2.2.0_alpha26/cvs/Linux x86_64, RepoMan options: --force)

3 files changed, 610 insertions, 2 deletions

diff --git a/sci-chemistry/ccp4-apps/ChangeLog b/sci-chemistry/ccp4-apps/ChangeLog
index b72b6eac9251..837199428582 100644
--- a/sci-chemistry/ccp4-apps/ChangeLog
+++ b/sci-chemistry/ccp4-apps/ChangeLog
@@ -1,6 +1,14 @@
 # ChangeLog for sci-chemistry/ccp4-apps
 # Copyright 1999-2011 Gentoo Foundation; Distributed under the GPL v2
-# $Header: /var/cvsroot/gentoo-x86/sci-chemistry/ccp4-apps/ChangeLog,v 1.24 2011/03/04 17:02:15 jlec Exp $
+# $Header: /var/cvsroot/gentoo-x86/sci-chemistry/ccp4-apps/ChangeLog,v 1.25 2011/03/14 17:06:53 jlec Exp $
+
+  14 Mar 2011; Justin Lecher <jlec@gentoo.org> +files/6.1.3-lapack.patch,
+  ccp4-apps-6.1.3-r9.ebuild:
+  Use pkg-config to detect BLAS/LAPAACK libs
+
+  14 Mar 2011; Justin Lecher <jlec@gentoo.org> +files/6.1.3-lapack.patch,
+  ccp4-apps-6.1.3-r9.ebuild:
+  Use pkg-config to detect BLAS/LAPAACK libs
 
 *ccp4-apps-6.1.3-r9 (04 Mar 2011)
 
diff --git a/sci-chemistry/ccp4-apps/ccp4-apps-6.1.3-r9.ebuild b/sci-chemistry/ccp4-apps/ccp4-apps-6.1.3-r9.ebuild
index bf22bc2e8b95..520ad814532e 100644
--- a/sci-chemistry/ccp4-apps/ccp4-apps-6.1.3-r9.ebuild
+++ b/sci-chemistry/ccp4-apps/ccp4-apps-6.1.3-r9.ebuild
@@ -1,6 +1,6 @@
 # Copyright 1999-2011 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
-# $Header: /var/cvsroot/gentoo-x86/sci-chemistry/ccp4-apps/ccp4-apps-6.1.3-r9.ebuild,v 1.1 2011/03/04 17:02:15 jlec Exp $
+# $Header: /var/cvsroot/gentoo-x86/sci-chemistry/ccp4-apps/ccp4-apps-6.1.3-r9.ebuild,v 1.2 2011/03/14 17:06:53 jlec Exp $
 
 EAPI="3"
 
@@ -156,6 +156,9 @@ src_prepare() {
 	# Not renaming, but unbundling libs
 	ccp_patch "${FILESDIR}"/${PV}-rename-rapper-ng.patch
 
+	# Use pkg-config to detect BLAS/LAPCK
+	ccp_patch "${FILESDIR}"/${PV}-lapack.patch
+
 	# Update things for oasis 4 usage
 	epatch "${WORKDIR}"/${PV}-oasis4.0.patch
 	sed 's: oasis : :g' -i src/Makefile.in || die
diff --git a/sci-chemistry/ccp4-apps/files/6.1.3-lapack.patch b/sci-chemistry/ccp4-apps/files/6.1.3-lapack.patch
new file mode 100644
index 000000000000..2514733f876d
--- /dev/null
+++ b/sci-chemistry/ccp4-apps/files/6.1.3-lapack.patch
@@ -0,0 +1,597 @@
+diff --git a/configure b/configure
+index 833f483..bcfa62d 100755
+--- a/configure
++++ b/configure
+@@ -3226,574 +3226,14 @@ else
+   echo
+   echo "Warning: this option has not been extensively tested!"
+   echo "Please report problems to ccp4@ccp4.ac.uk"
+-  # Search for vendor LAPACK/BLAS first
+-  if test ! "$with_netlib_lapack" ; then
+-    # Initialise variables to blank
+-    lapackdir=
+-    XLAPACK_LIB=
+-    # Possible directories to check for vendor or pre-existing LAPACK or
+-    # BLAS - add to these if you want to test others
+-    trydirs="`echo $LD_LIBRARY_PATH |sed -e s/:/\ /g` /lib /usr/lib /usr/local/lib"
+-    # Possible library names
+-    # These are the names like xxxx where the library will be libxxxx.a
+-    # or libxxxx.so
+-    echo
+-    echo "Guessing names for native/vendor LAPACK and/or BLAS libraries"
+-    echo "on this system"
+-    case $system in
+-      linux | linux64 | linux32 )
+-        # linux users will usually have them in /usr/lib but don't call it
+-        trylapack="lapack"
+-        tryblas="blas"
+-        # if code is non_shared then this can lead to problems. both blas and lapack
+-        # need to be resolved even if they are not called!
+-        if test "$non_shared" = yes; then
+-          echo "You are compiling linux non_shared. This sometimes causes problems "
+-          echo "  so checking for requirements." 
+-          echo "Checking: try to link library against test program"
+-          if test -f testlink.f || test -f testlink ; then
+-            rm -f testlink*
+-          fi 
+-          cat > testlink.f <<EOF
+-      PROGRAM TESTLINK
+-C A bit of scala code to test the linking
+-      real bf(3), bnorm
+-c
+-      integer maxbmt
+-      parameter (maxbmt = 2)
+-      double precision B(maxbmt,maxbmt), eigval(maxbmt),
+-     $   eigvec(maxbmt,maxbmt), w(5*maxbmt)
+-      integer m, ia, ix, istat
+-c
+-      B(1,1) = 1.00
+-      B(1,2) = 1.00
+-      B(2,1) = 1.00
+-      B(2,2) = 1.00
+-c
+-      m = maxbmt
+-      ia = maxbmt
+-      ix = maxbmt
+-      call dsyev('N', 'L', m, B, ia, eigval, w, 5*maxbmt, istat)
+-      end
+-EOF
+-          #firstly test without -lblas
+-          test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -llapack"
+-          echo $test_compile
+-          if { (eval $test_compile >& /dev/null ) 2>&1; } && test -s testlink ; then
+-            # Compilation was okay
+-            echo "... only -llapack needed"
+-            XLAPACK_LIB="-llapack"
+-            # Set the next two variables so that configure
+-            # doesn't try to build netlib libraries
+-            LAPACKLIB="lapack"
+-            noblas=yes
+-            trylapack=
+-            tryblas=
+-          else
+-	    echo "more than just -llapack needed...."
+-            test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -llapack -lblas"
+-            echo $test_compile
+-            if { (eval $test_compile ) 2>&1; } && test -s testlink ; then
+-              # Compilation was okay
+-              echo "...-llapack and -lblas were needed"
+-              XLAPACK_LIB="-llapack -lblas"
+-              # Set the next two variables so that configure
+-              # doesn't try to build netlib libraries
+-              LAPACKLIB="lapack blas"
+-              noblas=no
+-              trylapack=
+-              tryblas=
+-	    else
+-              echo "....could not find either lapack or blas."
+-	    fi
+-          fi
+-        fi
+-        # add 64 bit libs
+-        case $system in
+-          linux64 ) trydirs="/usr/lib64 ${trydirs}" ;;
+-        esac
+-
+-        ;;
+-      osf1)
+-        # OSF1 has dxml (old version) and cxml
+-        # which should have both lapack and blas 
+-        trylapack="dxml cxml"
+-        tryblas=
+-        trydirs="${trydirs} /usr/shlib"
+-        ;;
+-      irix)
+-        # Additional search paths for IRIX
+-        trydirs="${trydirs} /usr/lib32"
+-        # SCSL should have both LAPACK and BLAS
+-        trylapack="scs"
+-        tryblas="blas"
+-        ;;
+-      irix64)
+-        # Additional search paths for IRIX64
+-        trydirs="${trydirs} /usr/lib64"
+-        # SCSL should have both LAPACK and BLAS
+-        trylapack="scs"
+-        tryblas="blas"
+-        # Extra compiler flags?
+-        #XLAPACKFLAGS="-OPT:IEEE_NaN_inf=ON"
+-        ;;
+-      aix)
+-        # Additional search paths for AIX
+-        trydirs="${trydirs}" 
+-        # AIX might have ESSL library - blas only I think
+-        trylapack=
+-        tryblas="essl"
+-        ;;
+-      hpux)
+-        # Additional search paths for HPUX
+-        trydirs="${trydirs} /opt/fortran/lib /opt/fortran/lib/pa2.0 /opt/mlib/lib/pa2.0"
+-        # HPUX should have both LAPACK (part of mlib) and BLAS
+-        trylapack="lapack"
+-        tryblas="blas"
+-        # Extra compiler flags?
+-        # +U77 required for ETIME function - this is already in XFFLAGS
+-        #XLAPACKFLAGS="+U77"
+-        ;;
+-
+-      sunos | sunos64)
+-        # Sun has libraries with BLAS and LAPACK invoked using
+-        # -xlic_lib=sunperf
+-        trylapack=
+-        tryblas=
+-        echo "SunOs can use the Sun Performance Library (if installed)"
+-        echo "which has both BLAS and LAPACK 3.0"
+-        echo 
+-        echo "Looking for a valid library to use..."
+-        echo
+-	# Loop over the possible library names
+-        try_libs="sunperf"
+-        for testlib in $try_libs
+-        do
+-          if test ! "$XLAPACK_LIB" ; then
+-            # Try running a test compile to see if this a valid library
+-            if test -f testlink.f || test -f testlink ; then
+-              rm -f testlink*
+-            fi
+-            cat > testlink.f <<EOF
+-c Test fortran program to link against library
+-      PROGRAM TESTLINK
+-      IMPLICIT NONE
+-      INTEGER A
+-      A = 1
+-      STOP
+-      END
+-EOF
+-            test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -dalign -xlic_lib=$testlib"
+-            echo $test_compile
+-            if { (eval $test_compile ) 2>&1; } && test -s testlink ; then
+-              # Compilation was okay
+-              echo "... -xlic_lib=$testlib is okay"
+-              XLAPACK_LIB="-dalign -xlic_lib=$testlib"
+-              # Set the next two variables so that configure
+-              # doesn't try to build netlib libraries
+-              LAPACKLIB="$testlib"
+-              noblas=yes
+-            else
+-              # Compilation failed
+-              echo "... cannot use -xlic_lib=$testlib"
+-            fi
+-            # End of test for testlib
+-          fi
+-          # End of loop over possible lib names
+-        done
+-	# Report if no suitable library was found
+-        if test ! "$XLAPACK_LIB" ; then
+-          echo
+-          echo "No suitable LAPACK library was found."
+-          echo "This may be because the Sun Performance Library is not"
+-          echo "installed on your system"
+-          echo "Contact your system administrator or Sun vendor"
+-        fi
+-        ;;
+-      Darwin | Darwin32 | Darwin64 )
+-        # Darwin has libraries with BLAS and LAPACK invoked using 
+-        # -framework vecLib
+-        echo "Darwin can use the vecLib Library (if installed)"
+-        echo "which has both BLAS and LAPACK 3.0"
+-        echo
+-        # This is a special case so try running a test compile
+-        echo "Checking: try to link library against test program"
+-        if test -f testlink.f || test -f testlink ; then
+-          rm -f testlink*
+-        fi
+-        cat > testlink.f <<EOF
+-c Test fortran program to link against library
+-      PROGRAM TESTLINK
+-      IMPLICIT NONE     
+-      INTEGER A
+-      A = 1
+-      STOP
+-      END
+-EOF
+-        test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -framework vecLib"
+-        echo $test_compile
+-        if { (eval $test_compile ) 2>&1; } && test -s testlink ; then
+-          # Compilation was okay
+-          echo "... -framework vecLib is okay"
+-          XLAPACK_LIB="-framework vecLib"
+-          # Set the next two variables so that configure
+-          # doesn't try to build netlib libraries
+-          LAPACKLIB="vecLib"
+-          noblas=yes
+-        else
+-#alternative linking for vecLib libraries
+-          case `uname -sr` in
+-            *Darwin\ 7.* ) test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -lcc_dynamic -Wl,-framework -Wl,vecLib" ;;
+-            * ) test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -Wl,-framework -Wl,vecLib" ;;
+-          esac
+-
+-        echo $test_compile
+-        if { (eval $test_compile ) 2>&1; } && test -s testlink ; then
+-          # Compilation was okay
+-          echo "... -framework vecLib is okay"
+-          XLAPACK_LIB="-Wl,-framework -Wl,vecLib"
+-          # Set the next two variables so that configure
+-          # doesn't try to build netlib libraries
+-          LAPACKLIB="-Wl,-framework -Wl,vecLib"
+-          noblas=yes
+-        else
+-          # Compilation failed
+-          echo "... cannot use -framework vecLib"
+-          echo
+-         fi
+-        fi
+-        trylapack=
+-        tryblas=
+-# try the fink installation
+-        trydirs="${trydirs} /sw"
+-        ;;
+-      Darwin_ibm_compilers )
+-        # Darwin has libraries with BLAS and LAPACK invoked using
+-        # -framework vecLib
+-        echo "Darwin can use the vecLib Library (if installed)"
+-        echo "which has both BLAS and LAPACK 3.0"
+-        echo
+-        # This is a special case so try running a test compile
+-        echo "Checking: try to link library against test program"
+-        if test -f testlink.f || test -f testlink ; then
+-          rm -f testlink*
+-        fi
+-        cat > testlink.f <<EOF
+-c Test fortran program to link against library
+-      PROGRAM TESTLINK
+-      IMPLICIT NONE
+-      INTEGER A
+-      A = 1
+-      STOP
+-      END
+-EOF
+-      case `uname -sr` in
+-        Darwin\ 8* )
+-        XLAPACK_LIB="-L/System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A -lLAPACK -lBLAS"
+-        test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f $XLAPACK_LIB"
+-        ;;
+-        Darwin\ 7* )
+-        XLAPACK_LIB="-L/System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A -lLAPACK -lBLAS"
+-        test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -lcc_dynamic $XLAPACK_LIB"
+-        ;;
+-        *)
+-        XLAPACK_LIB="/System/Library/Frameworks/vecLib.Framework/Versions/Current/VecLib"
+-        test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f $XLAPACK_LIB"
+-        esac
+-        echo $test_compile
+-        if { (eval $test_compile ) 2>&1; } && test -s testlink ; then
+-          # Compilation was okay
+-          echo "... -framework vecLib is okay"
+-          # Set the next two variables so that configure
+-          # doesn't try to build netlib libraries
+-          LAPACKLIB="vecLib"
+-          noblas=yes
+-        else
+-          # Compilation failed
+-          XLAPACK_LIB=""
+-          echo "... cannot use -framework vecLib"
+-          echo
+-        fi
+-        trylapack=
+-        tryblas=
+-# try the fink installation
+-        trydirs="${trydirs} /sw"
+-        ;;
+-
+-      Darwin_intel_compilers)
+-        # Darwin has libraries with BLAS and LAPACK invoked using
+-        # -F vecLib
+-        echo "Darwin can use the vecLib Library (if installed)"
+-        echo "which has both BLAS and LAPACK 3.0"
+-        echo
+-        # This is a special case so try running a test compile
+-        echo "Checking: try to link library against test program"
+-        if test -f testlink.f || test -f testlink ; then
+-          rm -f testlink*
+-        fi
+-        cat > testlink.f <<EOF
+-c Test fortran program to link against library
+-      PROGRAM TESTLINK
+-      IMPLICIT NONE
+-      INTEGER A
+-      A = 1
+-      STOP
+-      END
+-EOF
+-        test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -Wl,-framework -Wl,vecLib"
+-        echo $test_compile
+-        if { (eval $test_compile ) 2>&1; } && test -s testlink ; then
+-          # Compilation was okay
+-          # doesn't try to build netlib libraries
+-          XLAPACK_LIB="-F /System/Library/Frameworks -Qoption,ld,-framework -Qoption,ld,vecLib"
+-          LAPACKLIB="vecLib"
+-          noblas=yes
+-        else
+-          # Compilation failed
+-          echo "... cannot use -framework vecLib"
+-          echo
+-         fi
+-        trylapack=
+-        tryblas=
+-# try the fink installation
+-        trydirs="${trydirs} /sw"
+-        ;;
+-
+-#       linux_ia64_sgi_altix)
+-# SGI Japan
+-      ia64_linux_intel) 
+-        # Additional search paths for Linux/IA64
+-        trydirs="${trydirs} /opt/scsl/lib /usr/lib /usr/local/lib"
+-        # SCSL and MKL should have both LAPACK and BLAS
+-        trylapack="mkl_lapack scs lapack"
+-        tryblas="mkl scs blas"
+-        ;;
+-      linux_ibm_compilers )
+-        trylapack="lapack"
+-        tryblas="blas"
+-        ;;
+-      linux64_ibm_compilers )
+-        trydirs="/usr/lib64 ${trydirs}"
+-        trylapack="lapack"
+-        tryblas="blas"
+-        ;;
+-      linux_intel_compilers )
+-        trydirs="/usr/lib64 ${trydirs}"
+-        trylapack="mkl_lapack lapack"
+-        tryblas="mkl blas"
+-        ;;
+-      *)
+-        echo "The guesses for this system may not be correct - please"
+-        echo "e-mail ccp4@ccp4.ac.uk if you have any extra information"
+-	echo
+-        # Default guess is just libblas
+-        trylapack="lapack"
+-        tryblas="blas"
+-        ;;
+-    esac
+-    #
+-    # Search for LAPACK libraries
+-    #
+-    # Write out what the guesses are
+-    if test "$trylapack" ; then
+-      echo "Possible LAPACK library names for this system:"
+-      for libname in $trylapack
+-      do
+-        echo "   lib$libname"
+-      done
+-      # Possible library name extensions
+-      tryexts="a so dylib"
+-      # Now loop over all the possibilities and see if anything
+-      # turns up
+-      echo
+-      echo "Searching for libraries with LAPACK and BLAS:"
+-      for testdir in $trydirs
+-      do
+-        for testlib in $trylapack
+-        do
+-          for ext in $tryexts
+-          do
+-            if test ! "$LAPACKLIB"; then
+-              if test -s "$testdir/lib$testlib.$ext" ; then
+-                echo "...found LAPACK library: $testdir/lib$testlib.$ext"
+-                # Now try and link to a test program
+-                # This is really for IRIX where libraries can be
+-                # o32 or n32
+-                echo "   Testing: try to link library against test program"
+-                if test -f testlink.f || test -f testlink ; then
+-                  rm -f testlink*
+-                fi
+-                cat > testlink.f <<EOF
+-c Test fortran program to link against library
+-      PROGRAM TESTLINK
+-      IMPLICIT NONE
+-      INTEGER A
+-      A = 1
+-      STOP
+-      END
+-EOF
+-                test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -L$testdir -l$testlib"
+-                test_ccompile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -L$testdir -l$testlib $XLDFLAGS"
+-                echo $test_compile
+-                if { (eval $test_compile ) 2>&1; } && test -s testlink ; then
+-                  have_lapack=yes
+-                else
+-# cover clapack option
+-                  echo $test_ccompile
+-                  if { (eval $test_ccompile ) 2>&1; } && test -s testlink ; then
+-                    have_lapack=yes
+-                  fi
+-                fi
+-                if test x$have_lapack = xyes ; then
+-                # This one is okay
+-                  LAPACKLIB="$testlib"
+-                  LAPACKDIR="$testdir"
+-                  echo "Link ok - using lib$LAPACKLIB from $LAPACKDIR"
+-		  #
+-		  XLAPACK_LIB="-L$LAPACKDIR -l$LAPACKLIB"
+-                  #
+-                  # Test to see if we need BLAS too
+-                  # Do this by trying to compile a test program
+-                  # Use the LSAME test for now
+-                  echo
+-                  echo "   * Checking whether we need a separate BLAS library *"
+-                  echo "   Testing: try linking library against test program"
+-                  cd lib/lapack/test
+-                  if test -f testlsame ; then
+-                    rm -f testsame testlsame.o
+-                  fi
+-                  test_compile="$FC $FOPTIM $XFFLAGS -o testlsame lsametst.f -L$LAPACKDIR -l$LAPACKLIB"
+-                  test_ccompile="$FC $FOPTIM $XFFLAGS -o testlsame lsametst.f -L$LAPACKDIR -l$LAPACKLIB $XLDFLAGS"
+-                  echo $test_compile
+-                  if { ( eval $test_compile) 2>&1;} && test -s testlsame ; then
+-                    have_blas=yes
+-                  else
+-#cblas route
+-                    echo $test_ccompile
+-                    if { ( eval $test_ccompile) 2>&1;} && test -s testlsame ; then
+-                      have_blas=yes
+-                    fi
+-                  fi
+-                  if test x$have_blas = xyes ; then
+-                    echo "Test program okay - additional separate BLAS not required"
+-                    noblas=yes
+-                  else
+-                    echo "Test program failed - need a separate BLAS library"
+-                  fi
+-                  cd ../../..
+-                else
+-                # Keep looking
+-                  echo "   link failed - cannot use lib$testlib"
+-                fi
+-              fi
+-            fi
+-          done
+-        done
+-        if test ! "$LAPACKLIB"; then
+-          echo "...nothing in $testdir"
+-        fi
+-      done
+-    fi
+-
+-    # If LAPACKLIB hasn't been set at this point then no LAPACK library
+-    # was found 
+-    if test ! "$LAPACKLIB" ; then
+-      echo
+-      echo "No pre-existing LAPACK library found - NetLib LAPACK will be built instead"
+-      make_lapack=lapacklib
+-    fi
+-    # Look for possible BLAS
+-    if test ! "$noblas" ; then
+-      if test "$tryblas" ; then
+-        echo
+-        echo "Possible BLAS library names for this system:"
+-        for libname in $tryblas
+-        do
+-          echo "   lib$libname"
+-        done
+-        # Possible library name extensions
+-        tryexts="a so"
+-        # Now loop over all the possibilities and see if anything
+-        # turns up
+-        echo
+-        echo "Searching for libraries with BLAS:"
+-        for testdir in $trydirs
+-        do
+-          for testlib in $tryblas
+-          do
+-            for ext in $tryexts
+-            do
+-              if test ! "$BLASLIB"; then
+-                if test -s "$testdir/lib$testlib.$ext" ; then
+-                  echo "...found BLAS library: $testdir/lib$testlib.$ext"
+-                  # Now try and link to a test program
+-                  # This is really for IRIX where libraries can be
+-                  # o32 or n32
+-                  echo "   Testing: try to link library against test program"
+-                  if test -f testlink.f || test -f testlink ; then
+-                    rm -f testlink*
+-                  fi
+-                  cat > testlink.f <<EOF
+-c Test fortran program to link against library
+-      PROGRAM TESTLINK
+-      IMPLICIT NONE
+-      INTEGER A
+-      A = 1
+-      STOP
+-      END
+-EOF
+-                  test_compile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -L$testdir -l$testlib"
+-                  test_ccompile="$FC $FOPTIM $XFFLAGS -o testlink testlink.f -L$testdir -l$testlib $XLDFLAGS"
+-                  echo $test_compile
+-                  if { ( eval $test_compile) 2>&1;} && test -s testlink ; then
+-                    have_blas=yes
+-                  else
+-                    echo $test_ccompile
+-                    if { ( eval $test_compile) 2>&1;} && test -s testlink ; then
+-                      have_blas=yes
+-                    fi
+-                  fi
+-                  if test x$have_blas = xyes ; then
+-                    # This one is okay
+-                    BLASLIB="$testlib"
+-                    BLASDIR="$testdir"
+-                    BLASEXT="$ext"
+-                    echo "Link ok - using lib$BLASLIB from $BLASDIR"
+-		    XLAPACK_LIB="$XLAPACK_LIB -L$BLASDIR -l$BLASLIB"
+-                  else
+-                  # Keep looking
+-                    echo "   link failed - cannot use lib$testlib"
+-                  fi
+-                fi
+-              fi
+-            done
+-          done
+-          if test ! "$BLASLIB"; then
+-            echo "...nothing in $testdir"
+-          fi
+-        done
+-      fi
+-      # Do we need to build BLAS too?      
+-      if test ! "$BLASLIB" ; then
+-        echo
+-        echo "No pre-existing BLAS library was found - NetLib BLAS will be built instead"
+-        echo "This may result in poorer performance of the LAPACK routines"
+-        make_blas=blaslib
+-        BLASLIB=blas
+-        BLASDIR="$srcdir/lib/lapack"
+-        BLASEXT="a"
+-      fi
+-    fi
++  # gentoo is clever
++  make_blas=
++  make_lapack=
++  BLASLIB=$(pkg-config --libs lapack)
++  LAPACKLIB=$(pkg-config --libs lapack)
++  XLAPACK_LIB="${BLASLIB} ${LAPACKLIB}"
++  XFFLAGS_LAPACK="$(pkg-config --cflags lapack blas)"
+   # Otherwise force building of NetLib BLAS and LAPACK libs
+-  else
+-    echo
+-    echo "! Force building of NetLib BLAS and LAPACK..."
+-    make_blas=blaslib
+-    make_lapack=lapacklib
+-    BLASLIB=blas
+-    BLASDIR="$srcdir/lib/lapack"
+-    BLASEXT="a"
+-  fi
+   # need to know if we the lapack library was linked using the C or
+   # fortran linker
+   if test -f testlink.f || test -f testlink || test -f testlink.c ; then
+@@ -3916,8 +3356,8 @@ RANLIB   = ${RANLIB}
+ INSTALL_DATA = ${INSTALL_DATA}
+ libdir   = $libdir
+ #
+-BLASLIB     = lib${BLASLIB}.${BLASEXT}
+-LAPACKLIB   = liblapack.a
++BLASLIB     = ${BLASLIB}
++LAPACKLIB   = ${LAPACKLIB}
+ #
+ # These variables define targets in the main Makefile
+ blaslib   = ${make_blas}