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require "mkmf"
if RUBY_ENGINE != "ruby"
STDERR.puts("\n\n***** This gem is MRI-specific. It does not support #{RUBY_ENGINE}. *****\n\n")
exit(1)
end
if RUBY_VERSION < "1.9.3"
STDERR.puts("\n\n***** Ruby version #{RUBY_VERSION} is no longer supported. Please upgrade to 1.9.3 or higher. *****\n\n")
exit(1)
end
# For the love of bitfields...
$CFLAGS += ' -std=c99'
# standard ruby methods
have_func("rb_gc_stat")
have_func("rb_gc_count")
have_func("rb_remove_event_hook_with_data")
# Alexander Dymo GC patch
have_func("rb_os_allocated_objects")
have_func("rb_gc_allocated_size")
# Stefan Kaes GC patches
have_func("rb_gc_collections")
have_func("rb_gc_time")
# for ruby 2.1
have_func("rb_gc_total_time")
have_func("rb_gc_total_mallocs")
have_func("rb_gc_total_malloced_bytes")
# Lloyd Hilaiel's heap info patch
have_func("rb_heap_total_mem")
have_func("rb_gc_heap_info")
def add_define(name, value = nil)
if value
$defs.push("-D#{name}=#{value}")
else
$defs.push("-D#{name}")
end
end
def windows?
RbConfig::CONFIG['host_os'] =~ /mswin|mingw/
end
if !windows? && RUBY_PLATFORM !~ /(darwin|openbsd)/
$LDFLAGS += " -lrt" # for clock_gettime
end
add_define("RUBY_PROF_RUBY_VERSION", RUBY_VERSION.split('.')[0..2].inject(0){|v,d| v*100+d.to_i})
# for ruby 1.9, determine whether threads inherit trace flags (latest 1.9.2 and later should work correctly)
if RUBY_VERSION > "1.9"
require 'set'
threads = Set.new
set_trace_func lambda { |*args| threads << Thread.current.object_id }
Thread.new{1}.join
set_trace_func nil
if threads.size < 2
# if we end up here, ruby does not automatically activate tracing in spawned threads
STDERR.puts("Ruby #{RUBY_VERSION} does not activate tracing in spawned threads. Consider upgrading.")
exit(1)
end
end
create_makefile("ruby_prof")
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