GNU bug report logs - #12057
LT_DLSYM_CONST not defined

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From: Thien-Thi Nguyen <ttn@HIDDEN>
To: bug-libtool@HIDDEN
Subject: LT_DLSYM_CONST not defined
Date: Thu, 26 Jul 2012 14:17:21 +0200
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Apparently, GNU Libtool 2.4 (2010-09-22) introduced =E2=80=98LT_DLSYM_CONST=
=E2=80=99
to ltdl.h, but that particular #define is requires "manual synching"
(according to this ltmain.sh excerpt):

  /* -*- c -*- /
  /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and te=
sts.  */
  #if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE)
  /* DATA imports from DLLs on WIN32 con't be const, because runtime
     relocations are performed -- see ld's documentation on pseudo-relocs. =
 */
  # define LT_DLSYM_CONST
  #elif defined(__osf__)
  /* This system does not cope well with relocations in const data.  */
  # define LT_DLSYM_CONST
  #else
  # define LT_DLSYM_CONST const
  #endif

In my code, i do:

  /* -*- c -*- /
  #include "libltdl/ltdl.h"

and this alone results in a "LT_DLSYM_CONST not defined" compilation
error.  However, adding that excerpt immediately prior to the #include
allows the compilation to succeed.  I presume what i've discovered is a
workaround at best and that there should be a better way to either avoid
this, or fully hide it from me (such that the plain old #include will be
sufficient, as before).  What would that way be?

=2D-=20
Thien-Thi Nguyen                                       GPG key: 4C807502

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