libcerf 1.8 (new formula)

Closes #32808.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/libcerf.rb

@@ -0,0 +1,37 @@
+class Libcerf < Formula
+  desc "Numeric library for complex error functions"
+  homepage "http://apps.jcns.fz-juelich.de/doku/sc/libcerf"
+  url "http://apps.jcns.fz-juelich.de/src/libcerf/libcerf-1.8.tgz"
+  sha256 "b2001dc594e9d85e2f4133fec52b4f7da02e9c2ea20518175fdebf5c81dd3857"
+
+  depends_on "cmake" => :build
+
+  def install
+    mkdir "build" do
+      system "cmake", "..", *std_cmake_args
+      system "make", "install"
+
+      mv prefix/"man", share
+    end
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <cerf.h>
+      #include <complex.h>
+      #include <math.h>
+      #include <stdio.h>
+      #include <stdlib.h>
+
+      int main (void) {
+        double _Complex a = 1.0 - 0.4I;
+        a = cerf(a);
+        if (fabs(creal(a)-0.910867) > 1.e-6) abort();
+        if (fabs(cimag(a)+0.156454) > 1.e-6) abort();
+        return 0;
+      }
+    EOS
+    system ENV.cc, "test.c", "-I#{include}", "-L#{lib}", "-lcerf", "-o", "test"
+    system "./test"
+  end
+end