extconf.rb in gsl-2.1.0

- old
+ new

@@ -7,10 +7,39 @@
   }, lambda { |val| puts "checking gsl #{arg}... #{val}"; val }
 rescue => err
   abort "*** ERROR: missing required library to compile this module: #{err}"
 end
 
+# Function derived from NArray's extconf.rb.
+def create_conf_h(file) #:nodoc:
+  print "creating #{file}\n"
+  File.open(file, 'w') do |hfile|
+    header_guard = file.upcase.sub(/\s|\./, '_')
+
+    hfile.puts "#ifndef #{header_guard}"
+    hfile.puts "#define #{header_guard}"
+    hfile.puts
+
+    # FIXME: Find a better way to do this:
+    hfile.puts "#define RUBY_2 1" if RUBY_VERSION >= '2.0'
+
+    for line in $defs
+      line =~ /^-D(.*)/
+      match_data = $1.dup
+
+      if match_data.match(/GSL_VERSION*/)
+        hfile.printf "#define #{match_data.to_s.split('=').join(' ')}\n"
+      else
+        hfile.printf "#define %s 1\n", match_data
+      end
+    end
+
+    hfile.puts
+    hfile.puts "#endif"
+  end
+end
+
 def gsl_def(const, value = nil)
   value = "=#{value}" if value
   $defs << "-D#{const}#{value}"
 end
 
@@ -28,12 +57,23 @@
 
 def gsl_gem_config(target, dir = 'ext')
   path = begin
     require 'rubygems'
 
-    spec = Gem::Specification.find_by_path("#{target}.h")
-    File.join(spec.full_gem_path, dir) if spec
+    # For some weird reason finding narray and nmatrix headers works with specific
+    # functions only. Might need to fix nmatrix/narray to place headers in correct
+    # locations?
+    if target == 'narray'
+      gem 'narray'
+      spec = Gem::Specification.find_by_path("#{target}")
+      File.join(spec.full_gem_path, dir) if spec
+    else
+      gem 'nmatrix'
+      spec = Gem::Specification.find_all_by_name("#{target}").compact
+      File.join(spec[0].require_path)
+    end
+
   rescue LoadError
   end
 
   gsl_dir_config(target, path)
 
@@ -64,11 +104,11 @@
     gte && gsl_def("GSL_#{ary.join('_')}_LATER")
   }
 
   raise 'Ruby/GSL requires gsl-1.15 or later.' unless later['1.15']
 
-  %w[1.15 1.16].each { |v| later[v] }
+  %w[1.15 1.16 2.0 2.1].each { |v| later[v] }
 }
 
 gsl_config_arg(:cflags) { |cflags, check|
   $CFLAGS += ' ' + check[cflags]
 }
@@ -103,16 +143,30 @@
 gsl_have_library('gsl_eigen_francis')
 gsl_have_library('gsl_poly_solve_quartic')
 
 gsl_def(:HAVE_GNU_GRAPH) if find_executable('graph')
 
-gsl_gem_config('narray', 'src')
+external_libs = []
+external_libs << 'narray' if ENV['NARRAY']
+external_libs << 'nmatrix' if ENV['NMATRIX']
 
-have_header('narray.h')
-have_library('narray') if RUBY_PLATFORM =~ /cygwin|mingw/
+external_libs.each do |library|
+  gsl_gem_config(library)
+  have_header("#{library}.h")
+  have_library(library) if RUBY_PLATFORM =~ /cygwin|mingw/  
+end
 
 unless arg_config('--disable-tamu-anova')
   gsl_dir_config('tamu_anova')
   gsl_have_header('tamuanova', 'tamu_anova/tamu_anova.h')
 end
 
+have_struct_member('gsl_multifit_fdfsolver', 'J', 'gsl/gsl_multifit_nlin.h')
+have_func('gsl_sf_mathieu_a_e',  'gsl/gsl_sf_mathieu.h');
+have_func('gsl_sf_mathieu_b_e',  'gsl/gsl_sf_mathieu.h');
+have_func('gsl_sf_mathieu_ce_e', 'gsl/gsl_sf_mathieu.h');
+have_func('gsl_sf_mathieu_se_e', 'gsl/gsl_sf_mathieu.h');
+have_func('gsl_sf_mathieu_Mc_e', 'gsl/gsl_sf_mathieu.h');
+have_func('gsl_sf_mathieu_Ms_e', 'gsl/gsl_sf_mathieu.h');
+
+create_conf_h('gsl_config.h')
 create_makefile('gsl_native')