# Testcase run by default. To disable: rpm(or rpmbuild) -ba --define 'dotests 0' openblas*.spec
%{!?dotests: %define dotests 1}
%global _pkgconfigdir %{_libdir}/pkgconfig

Summary:          An optimized BLAS library based on GotoBLAS2
Name:             openblas
Version:          0.3.8
Release:          1
License:          BSD
Group:            Development/Libraries
URL:              https://github.com/xianyi/OpenBLAS
#Source0:          https://github.com/xianyi/OpenBLAS/archive/v%{version}/OpenBLAS-%{version}.tar.gz
Source0:          https://github.com/xianyi/OpenBLAS/archive/v%{version}/OpenBLAS-%{version}.zip
Patch0:           openblas-Dont_cross_compile.patch
# Patch reduced vs version for 0.3.6
Patch1:           openblas-0.3.8-power8-aix.patch
#	Patch2:           openblas-power8-big-endian-fix.patch
Patch3:           openblas-0.3.8-AIX-TARGETS.patch
BuildRoot:        %{_tmppath}/%{name}-%{version}-%{release}-root

BuildRequires: gcc-gfortran >= 6.3.0
BuildRequires: libgomp >= 6.3.0

Requires: libgcc >= 6.3.0
Requires: gcc-gfortran >= 6.3.0
Requires: libgomp >= 6.3.0

%description
OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.
It is an open source implementation of the BLAS (Basic Linear Algebra 
Subprograms) API with many hand-crafted optimizations for specific 
processor types.OpenBLAS adds optimized implementations of linear 
algebra kernels for several processor architectures.

This version contains POWER 6 and POWER 8 builds. Depending on the  
processor running mode, either POWER6 or POWER8 files (libraries, 
headers, pkgconfig (.pc file)) will be set as default. This is done
by the post installation script of this rpm.

%prep
%setup -q -n OpenBLAS-%{version}
%patch0 -p0
%patch3 -p1

rm -rf   /tmp/%{name}-%{version}-power6
cp -pr . /tmp/%{name}-%{version}-power6
rm -fr *
mv       /tmp/%{name}-%{version}-power6 power6
cp -pr power6 power8

cd power8
%patch1 -p1
#	%patch2 -p1


%build

PATH=/opt/freeware/bin:$PATH
export CC="gcc -maix64"
export CXX="g++ -maix64"
export FC="gfortran -maix64"

for arch in power8 power6
do
  cd $arch
  make BINARY=64 TARGET=$(echo $arch | /usr/bin/tr '[a-z]' '[A-Z]')

  if [ "%{dotests}" == 1 ]
  then
     cd utest
     gcc -maix64 -I.. -I. utest_main2.c ../libopenblas.a -lgomp -lpthread -lm -o utest2
     ./utest2
     cd ..
  fi

  #This needs CreateExportList which comes from XLC fileset.
  #So better we use the one from GNU libtool

  #/usr/vac/bin/CreateExportList -X64 openblas.exp libopenblas.a

  `echo /usr/bin/nm -X32_64 | /usr/bin/sed -e 's/B\([^B]*\)$/P\1/'` -PCpgl libopenblas.a | \
  /usr/bin/awk '{ if ((($ 2 == "T") || ($ 2 == "D") || ($ 2 == "B") || ($ 2 == "W") || ($ 2 == "V") || ($ 2 == "Z")) \
  && (substr($ 1,1,1) != ".")) { if (($ 2 == "W") || ($ 2 == "V") || ($ 2 == "Z")) { print $ 1 " weak" } \
  else { print $ 1 } } }' | /usr/bin/sort -u > openblas.exp

  export LDFLAGS="-lm -lpthread -lgfortran -lgomp -Wl,-bE:openblas.exp -Wl,-blibpath:/opt/freeware/lib:/usr/lib:/lib -Wl,-bbigtoc"

  gcc -maix64 -shared libopenblas_${arch}p-r%{version}.a -o libopenblas.so.0 $LDFLAGS
  unset LDFLAGS

  cd ..
done


%install
[ "${RPM_BUILD_ROOT}" != "/" ] && rm -rf ${RPM_BUILD_ROOT}

PATH=/opt/freeware/bin:$PATH
export CC="gcc -maix64"
export CXX="g++ -maix64"
export FC="gfortran -maix64"

for arch in power8 power6
do
  TARGET=$(echo $arch | /usr/bin/tr '[a-z]' '[A-Z]')

  cd $arch

  make install DESTDIR=${RPM_BUILD_ROOT} PREFIX=%{_prefix}

  mkdir ${RPM_BUILD_ROOT}%{_includedir}/OpenBLAS_${TARGET}

  /usr/bin/mv ${RPM_BUILD_ROOT}%{_includedir}/*.h ${RPM_BUILD_ROOT}%{_includedir}/OpenBLAS_${TARGET}

  mkdir ${RPM_BUILD_ROOT}%{_libdir}/OpenBLAS_${TARGET}

  /usr/bin/mv ${RPM_BUILD_ROOT}%{_libdir}/pkgconfig ${RPM_BUILD_ROOT}%{_libdir}/OpenBLAS_${TARGET}

  /usr/bin/rm ${RPM_BUILD_ROOT}/%{_libdir}/libopenblas.*

  /usr/bin/ar -X64 -q ${RPM_BUILD_ROOT}/%{_libdir}/OpenBLAS_${TARGET}/libopenblas.a libopenblas.so.0

  cd ..
done

#create symbolic links in the original path towards POWER8 files

cd ${RPM_BUILD_ROOT}%{_includedir}

ln -sf OpenBLAS_POWER8/* .

cd ${RPM_BUILD_ROOT}%{_libdir}

ln -sf OpenBLAS_POWER8/libopenblas.a .

mkdir ${RPM_BUILD_ROOT}%{_pkgconfigdir}

cd ${RPM_BUILD_ROOT}%{_pkgconfigdir}

ln -sf ../OpenBLAS_POWER8/pkgconfig/openblas.pc .


%pre
# Processor Version: PV_7_Compat
# Processor Version: PV_6_Compat
# Processor Version: PV_5_Compat
ProcVersion=`prtconf | grep "Processor Version:" | awk -F_ '{ print $2}'`
#echo $ProcVersion
if [ $ProcVersion -lt 6 ]
then
        echo "This rpm will only work with Power6 (and above) compatibility mode."
        echo "prtconf: "
        prtconf | grep "Processor Version:"
        exit 1
fi

%post
ProcVersion=`prtconf | grep "Processor Version:" | awk -F_ '{ print $2}'`
if [ $ProcVersion -lt 8 ]
then
        cd %{_includedir} ; ln -sf OpenBLAS_POWER6/* .
        cd %{_libdir} ; ln -sf OpenBLAS_POWER6/libopenblas.a .
        cd %{_pkgconfigdir} ; ln -sf ../OpenBLAS_POWER6/pkgconfig/openblas.pc .
        echo "Since the Machine Processor Version is below Power 8, Power 6 code built OpenBLAS library, headers & pkgconfig files are made default."
fi

%clean
[ "${RPM_BUILD_ROOT}" != "/" ] && rm -rf ${RPM_BUILD_ROOT}


%files
%defattr(-,root,system)
%doc power8/LICENSE power8/README.md power8/USAGE.md power8/GotoBLAS_00License.txt
%{_libdir}/libopenblas.a
%{_libdir}/pkgconfig/openblas.pc
%{_libdir}/OpenBLAS_POWER6
%{_libdir}/OpenBLAS_POWER8
%{_includedir}/*


%changelog
* Thu Aug 29 2019 Ayappan P <ayappap2@in.ibm.com> - 0.3.6-1
- Update to 0.3.6
- Power8 code build as well

* Wed Mar 20 2019 Ayappan P <ayappap2@in.ibm.com> - 0.3.5-1
- First port to AIX Toolbox