acinclude.m4

   1 dnl Expat macro retrived on the Expat CVS
   2
   3 dnl Check if --with-expat[=PREFIX] is specified and
   4 dnl Expat >= 1.95.0 is installed in the system.
   5 dnl If yes, substitute EXPAT_CFLAGS, EXPAT_LIBS with regard to
   6 dnl the specified PREFIX and set with_expat to PREFIX, or 'yes' if PREFIX
   7 dnl has not been specified. Also HAVE_LIBEXPAT, HAVE_EXPAT_H are defined.
   8 dnl If --with-expat has not been specified, set with_expat to 'no'.
   9 dnl In addition, an Automake conditional EXPAT_INSTALLED is set accordingly.
  10 dnl This is necessary to adapt a whole lot of packages that have expat
  11 dnl bundled as a static library.
  12 AC_DEFUN(AM_WITH_EXPAT,
  13 [ AC_ARG_WITH(expat,
  14               [  --with-expat=PREFIX     Use system Expat library],
  15               , with_expat=yes)
  16
  17   AM_CONDITIONAL(EXPAT_INSTALLED, test $with_expat != no)
  18
  19   EXPAT_CFLAGS=
  20   EXPAT_LIBS=
  21   if test $with_expat != no; then
  22         if test $with_expat != yes; then
  23                 EXPAT_CFLAGS="-I$with_expat/include"
  24                 EXPAT_LIBS="-L$with_expat/lib"
  25         fi
  26         AC_CHECK_LIB(expat, XML_ParserCreate,
  27                      [ EXPAT_LIBS="$EXPAT_LIBS -lexpat"
  28                        expat_found=yes ],
  29                      [ expat_found=no ],
  30                      "$EXPAT_LIBS")
  31         if test $expat_found = no; then
  32                 AC_MSG_ERROR([Could not find the Expat library])
  33         fi
  34         expat_save_CFLAGS="$CFLAGS"
  35         CFLAGS="$CFLAGS $EXPAT_CFLAGS"
  36         AC_CHECK_HEADERS(expat.h, , expat_found=no)
  37         if test $expat_found = no; then
  38                 AC_MSG_ERROR([Could not find expat.h])
  39         fi
  40         CFLAGS="$expat_save_CFLAGS"
  41   fi
  42
  43   AC_SUBST(EXPAT_CFLAGS)
  44   AC_SUBST(EXPAT_LIBS)
  45 ])