1 files changed, 65 insertions, 0 deletions
diff --git a/ext/parser/extconf.rb b/ext/parser/extconf.rb
new file mode 100644
index 0000000..5611934
--- /dev/null
+++ b/ext/parser/extconf.rb
@@ -0,0 +1,65 @@
+# rubocop:disable Style/GlobalVars
+require "mkmf"
+require "rubygems"
+require "libyajl2"
+
+RbConfig::MAKEFILE_CONFIG["CC"] = ENV["CC"] if ENV["CC"]
+
+# pick up the vendored libyajl2 out of the libyajl2 gem
+$CFLAGS = "-I#{Libyajl2.include_path} #{$CFLAGS}"
+$LDFLAGS = "-L#{Libyajl2.opt_path} #{$LDFLAGS}"
+
+# remove "-Wl,--no-undefined" flag if existent to allow for loading with dlopen
+$LDFLAGS.slice!("-Wl,--no-undefined")
+
+puts $CFLAGS
+puts $LDFLAGS
+
+# except if you're doing an unoptimized gcc install we're going to help you out a bit
+if RbConfig::MAKEFILE_CONFIG["CC"] =~ /gcc|clang/
+  $CFLAGS << " -O3" unless $CFLAGS[/-O\d/]
+  # how many people realize that -Wall is a compiler-specific flag???
+  # apparently not many based on reading lots of shitty extconf.rb's out there
+  $CFLAGS << " -Wall"
+end
+
+def windows?
+  !!(RUBY_PLATFORM =~ /mswin|mingw|cygwin|windows/)
+end
+
+if windows?
+  # include our libyajldll.a definitions on windows in the libyajl2 gem
+  $libs = "#{$libs} -lyajldll"
+end
+
+# NOTE: find_library has the side effect of adding -lyajl to the flags which we are deliberately
+# avoiding doing with the libyajl2-gem (allowing it to be lazily loaded with dlopen)
+if !windows? && !find_header("yajl/yajl_tree.h")
+  puts "libyajl2 headers not found in libyajl2-gem, searching for system libraries..."
+
+  HEADER_DIRS = [
+    "/opt/local/include",                   # MacPorts
+    "/usr/local/include",                   # /usr/local
+    RbConfig::CONFIG["includedir"],         # Ruby
+    "/usr/include",                         # (default)
+  ].freeze
+
+  LIB_DIRS = [
+    "/opt/local/lib",                       # MacPorts
+    "/usr/local/lib",                       # /usr/local + Homebrew
+    RbConfig::CONFIG["libdir"],             # Ruby
+    "/usr/lib",                             # (default)
+  ].freeze
+
+  # add --with-yajl-dir, --with-yajl-include, --with-yajl-lib
+  dir_config("yajl", HEADER_DIRS, LIB_DIRS)
+
+  # here we use find_library in order to deliberately link with -lyajl as a useful side-effect
+  unless find_header("yajl/yajl_tree.h") && find_library("yajl", "yajl_complete_parse")
+    abort "libyajl2 is missing.  please install libyajl2"
+  end
+end
+
+dir_config "parser"
+
+create_makefile "ffi_yajl/ext/parser"