%global __brp_check_rpaths %{nil}
%global __requires_exclude ^libmpi
%global packname  RcppBigIntAlgos
%global packver   1.1.0
%global rlibdir   /usr/local/lib/R/library

Name:             R-CRAN-%{packname}
Version:          1.1.0
Release:          1%{?dist}%{?buildtag}
Summary:          Factor Big Integers with the Parallel Quadratic Sieve

License:          GPL (>= 2)
URL:              https://cran.r-project.org/package=%{packname}
Source0:          %{url}&version=%{packver}#/%{packname}_%{packver}.tar.gz


BuildRequires:    gmp-devel
BuildRequires:    R-devel
Requires:         R-core
BuildRequires:    R-CRAN-gmp 
BuildRequires:    R-CRAN-cpp11 
Requires:         R-CRAN-gmp 

%description
Features the multiple polynomial quadratic sieve (MPQS) algorithm for
factoring large integers and a vectorized factoring function that returns
the complete factorization of an integer. The MPQS is based off of the
seminal work of Carl Pomerance (1984) <doi:10.1007/3-540-39757-4_17> along
with the modification of multiple polynomials introduced by Peter
Montgomery and J. Davis as outlined by Robert D. Silverman (1987)
<doi:10.1090/S0025-5718-1987-0866119-8>. Utilizes the C library GMP (GNU
Multiple Precision Arithmetic). For smaller integers, a simple Elliptic
Curve algorithm is attempted followed by a constrained version of
Pollard's rho algorithm. The Pollard's rho algorithm is the same algorithm
used by the factorize function in the 'gmp' package.

%prep
%setup -q -c -n %{packname}

# fix end of executable files
find -type f -executable -exec grep -Iq . {} \; -exec sed -i -e '$a\' {} \;
# prevent binary stripping
[ -d %{packname}/src ] && find %{packname}/src -type f -exec \
  sed -i 's@/usr/bin/strip@/usr/bin/true@g' {} \; || true
[ -d %{packname}/src ] && find %{packname}/src/Make* -type f -exec \
  sed -i 's@-g0@@g' {} \; || true
# don't allow local prefix in executable scripts
find -type f -executable -exec sed -Ei 's@#!( )*/usr/local/bin@#!/usr/bin@g' {} \;

%build

%install

mkdir -p %{buildroot}%{rlibdir}
%{_bindir}/R CMD INSTALL -l %{buildroot}%{rlibdir} %{packname}
test -d %{packname}/src && (cd %{packname}/src; rm -f *.o *.so)
rm -f %{buildroot}%{rlibdir}/R.css
# remove buildroot from installed files
find %{buildroot}%{rlibdir} -type f -exec sed -i "s@%{buildroot}@@g" {} \;

%files
%{rlibdir}/%{packname}