src/expat/conftools/expat.m4

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