distributable:
  url: https://ftp.gnu.org/gnu/mpfr/mpfr-{{ version.raw }}.tar.gz
  strip-components: 1

versions:
  url: https://ftp.gnu.org/gnu/mpfr/
  match: /mpfr-\d+\.\d+(\.\d+)?\.tar\.gz/
  strip:
    - /mpfr-/
    - /.tar.gz/

build:
  dependencies:
    gnu.org/gmp: '>=4.2'
  script: |
    ./configure --prefix={{ prefix }}
    make --jobs {{ hw.concurrency }} install
  test:
    make test

test:
  dependencies:
    gnu.org/gmp: '>=4.2'
  script: |
    mv $FIXTURE test.c
    gcc -lgmp -lmpfr test.c -o test
    test $(./test) = '{{version}}'
  fixture: |
    #include <mpfr.h>
    #include <math.h>
    #include <stdlib.h>
    #include <string.h>
    #include <stdio.h>

    int main() {
      mpfr_t x, y;
      mpfr_inits2 (256, x, y, NULL);
      mpfr_set_ui (x, 2, MPFR_RNDN);
      mpfr_rootn_ui (y, x, 2, MPFR_RNDN);
      mpfr_pow_si (x, y, 4, MPFR_RNDN);
      mpfr_add_si (y, x, -4, MPFR_RNDN);
      mpfr_abs (y, y, MPFR_RNDN);
      if (fabs(mpfr_get_d (y, MPFR_RNDN)) > 1.e-30) abort();
      printf("%s", mpfr_get_version());
      return 0;
    }