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Viewing changes to cfg/m4/check_pnglib.m4

  • Committer: Bazaar Package Importer
  • Author(s): Steve M. Robbins
  • Date: 2004-05-29 02:58:50 UTC
  • Revision ID: james.westby@ubuntu.com-20040529025850-nkh0l2b0mixwkcgh
Tags: 1.0.2-3
http://bugs.debian.org/241102
Build against coin-2, rather than coin-1.  Closes: #241102.

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cfg/m4/check_pnglib.m4
 
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# **************************************************************************
 
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# SIM_AC_HAVE_LIBPNG_IFELSE( IF-FOUND, IF-NOT-FOUND )
 
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#
 
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# Variables:
 
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#   sim_ac_have_libpng
 
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#   sim_ac_libpng_cppflags
 
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#   sim_ac_libpng_ldflags
 
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#   sim_ac_libpng_libs
 
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#
 
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# Authors:
 
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#   Lars J. Aas <larsa@coin3d.org>
 
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#   Morten Eriksen <mortene@coin3d.org>
 
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#
 
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# Todo:
 
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# - use AS_UNSET to unset internal variables to avoid polluting the environment
 
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#
 
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# **************************************************************************
 
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AC_DEFUN([SIM_AC_HAVE_LIBPNG_IFELSE],
 
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[: ${sim_ac_have_libpng=false}
 
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AC_MSG_CHECKING([for libpng])
 
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AC_ARG_WITH(
 
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  [png],
 
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  [AC_HELP_STRING([--with-png=PATH], [enable/disable libpng support])],
 
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  [case $withval in
 
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  yes | "") sim_ac_want_libpng=true ;;
 
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  no)       sim_ac_want_libpng=false ;;
 
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  *)        sim_ac_want_libpng=true
 
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            sim_ac_libpng_path=$withval ;;
 
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  esac],
 
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  [sim_ac_want_libpng=true])
 
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case $sim_ac_want_libpng in
 
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true)
 
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  $sim_ac_have_libpng && break
 
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  sim_ac_libpng_save_CPPFLAGS=$CPPFLAGS
 
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  sim_ac_libpng_save_LDFLAGS=$LDFLAGS
 
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  sim_ac_libpng_save_LIBS=$LIBS
 
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  sim_ac_libpng_debug=false
 
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  test -n "`echo -- $CPPFLAGS $CFLAGS $CXXFLAGS | grep -- '-g\\>'`" &&
 
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    sim_ac_libpng_debug=true
 
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  # test -z "$sim_ac_libpng_path" -a x"$prefix" != xNONE &&
 
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  #   sim_ac_libpng_path=$prefix
 
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  sim_ac_libpng_name=png
 
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  if test -n "$sim_ac_libpng_path"; then
 
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    for sim_ac_libpng_candidate in \
 
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      `( ls $sim_ac_libpng_path/lib/png*.lib;
 
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         ls $sim_ac_libpng_path/lib/png*d.lib ) 2>/dev/null`
 
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    do
 
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      case $sim_ac_libpng_candidate in
 
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      *d.lib)
 
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        $sim_ac_libpng_debug &&
 
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          sim_ac_libpng_name=`basename $sim_ac_libpng_candidate .lib` ;;
 
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      *.lib)
 
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        sim_ac_libpng_name=`basename $sim_ac_libpng_candidate .lib` ;;
 
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      esac
 
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    done
 
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    sim_ac_libpng_cppflags="-I$sim_ac_libpng_path/include"
 
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    CPPFLAGS="$sim_ac_libpng_cppflags $CPPFLAGS"
 
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    sim_ac_libpng_ldflags="-L$sim_ac_libpng_path/lib"
 
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    LDFLAGS="$sim_ac_libpng_ldflags $LDFLAGS"
 
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    # unset sim_ac_libpng_candidate
 
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    # unset sim_ac_libpng_path
 
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  fi
 
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  sim_ac_libpng_libs="-l$sim_ac_libpng_name"
 
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  LIBS="$sim_ac_libpng_libs $LIBS"
 
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  AC_TRY_LINK(
 
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    [#include <png.h>],
 
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    [(void)png_read_info(0L, 0L);],
 
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    [sim_ac_have_libpng=true])
 
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  CPPFLAGS=$sim_ac_libpng_save_CPPFLAGS
 
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  LDFLAGS=$sim_ac_libpng_save_LDFLAGS
 
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  LIBS=$sim_ac_libpng_save_LIBS
 
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  # unset sim_ac_libpng_debug
 
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  # unset sim_ac_libpng_name
 
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  # unset sim_ac_libpng_save_CPPFLAGS
 
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  # unset sim_ac_libpng_save_LDFLAGS
 
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  # unset sim_ac_libpng_save_LIBS
 
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  ;;
 
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esac
 
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if $sim_ac_want_libpng; then
 
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  if $sim_ac_have_libpng; then
 
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    AC_MSG_RESULT([success ($sim_ac_libpng_libs)])
 
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    $1
 
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  else
 
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    AC_MSG_RESULT([failure])
 
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    $2
 
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  fi
 
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else
 
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  AC_MSG_RESULT([disabled])
 
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  $2
 
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fi
 
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# unset sim_ac_want_libpng
 
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])
 
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# **************************************************************************
 
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# Usage:
 
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#  SIM_AC_CHECK_PNG_READY([ACTION-IF-READY[, ACTION-IF-NOT-READY]])
 
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#
 
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#  Try to link code which needs the PNG development system.
 
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#
 
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# Author: Morten Eriksen, <mortene@sim.no>.
 
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AC_DEFUN([SIM_AC_CHECK_PNG_READY],
 
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[AC_MSG_CHECKING([if we can use libpng without explicit linkage])
 
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AC_TRY_LINK(
 
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  [#include <png.h>],
 
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  [(void)png_read_info(0L, 0L);],
 
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  sim_ac_png_ready=true,
 
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  sim_ac_png_ready=false)
 
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if $sim_ac_png_ready; then
 
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  AC_MSG_RESULT([yes])
 
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  $1
 
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else
 
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  AC_MSG_RESULT([no])
 
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  $2
 
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fi
 
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])
 
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# EOF **********************************************************************