From: Kubo Takehiro <kubo@...>
Date: 2013-02-28T07:21:47+09:00
Subject: Re: Problem building Ruby 1.9.3 patchlevel 385 under AIX 7.1

On Thu, Feb 28, 2013 at 6:43 AM, Ryan Davis <ryand-ruby@zenspider.com> wrote:
> You can see the T entry for _Init_dot. I'm guessing you have that. Why you're trying to pick up Init_dot.dot instead of Init_dot is strange and points at the loader not assembling the right name to begin with.

That's because the configure script set "DLDFLAGS='-eInit_$(TARGET)'" on AIX
and mkmf.rb creates Makefile which contains "TARGET = dot.dot".

IMO, one line in configure.in should be changed as follows:

        [aix*], [	: ${LDSHARED='$(CC)'}
			LDSHARED="$LDSHARED ${linker_flag}-G"
			DLDFLAGS='-e$(ENTRY_POINT)'        # CHANGE THIS LINE
			XLDFLAGS="${linker_flag}"'-bE:$(ARCHFILE)'" ${linker_flag}-brtl"

and two lines in lib/mkmf.rb  should be added as follows:

  dllib = target ? "$(TARGET).#{CONFIG['DLEXT']}" : ""
  entry_point = target ? "Init_#{target}".sub(/\..*\z/,'')  : "" # ADD
THIS LINE (1)
  staticlib = target ? "$(TARGET).#$LIBEXT" : ""

....

TARGET = #{target}
DLLIB = #{dllib}
ENTRY_POINT = #{entry_point}  # ADD THIS LINE (2)
EXTSTATIC = #{$static || ""}
STATIC_LIB = #{staticlib unless $static.nil?}

I have not tested this because I don't have AIX.