#!/bin/bash
set -eu


# NOTE: There is a single difference between the Linux and macOS 
#		configurations, which is the addition of the -static-libgfortran 
#		option to FFLAGS on the macOS static configurations. For the sake of 
#		consistency, we maintain separate files for each, respective Linux and 
#		macOS configuration.

## Constants
#
VER="3.12.3"

# Download source
$ISSM_DIR/scripts/DownloadExternalPackage.sh "https://issm.ess.uci.edu/files/externalpackages/petsc-lite-${VER}.tar.gz" "petsc-${VER}.tar.gz"

# Unpack source
tar -zxvf petsc-${VER}.tar.gz

# Cleanup
rm -rf install src
mkdir install src

# Move source to 'src' directory
mv petsc-${VER}/* src/
rm -rf petsc-${VER}

# Configure
#
# NOTE: 
# - Cannot use --with-fpic option when compiling static libs,
#
#		Cannot determine compiler PIC flags if shared libraries is turned off
#		Either run using --with-shared-libraries or --with-pic=0 and supply the
#		compiler PIC flag via CFLAGS, CXXXFLAGS, and FCFLAGS
#
# - Added -fallow-argument-mismatch to FFLAGS in order to clear,
#
#		error: The Fortran compiler gfortran will not compile files that call 
#		the same routine with arguments of different types.
#
#	This has only been added to macOS static builds, but may be needed 
#	elsewhere.
#
cd src
./config/configure.py \
	--prefix="${ISSM_DIR}/externalpackages/petsc/install" \
	--PETSC_DIR="${ISSM_DIR}/externalpackages/petsc/src" \
	--with-shared-libraries=0 \
	--CFLAGS="-fPIC" \
	--CXXFLAGS="-fPIC" \
	--FFLAGS="-fPIC -fallow-argument-mismatch -static-libgfortran" \
	--with-debugging=0 \
	--with-valgrind=0 \
	--with-x=0 \
	--with-ssl=0 \
	--download-fblaslapack=1 \
	--download-mpich=1 \
	--download-metis=1 \
	--download-parmetis=1 \
	--download-scalapack=1 \
	--download-mumps=1 \
	--download-zlib=1 \
	--download-hdf5=1

# Compile and install
make
make install