编辑文件 - expat.m4

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路径: /snap/certbot/5758/usr/share/aclocal/expat.m4
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dnl Check if --with-expat[=PREFIX] is specified and
dnl Expat >= 1.95.0 is installed in the system.
dnl If yes, substitute EXPAT_CFLAGS, EXPAT_LIBS with regard to
dnl the specified PREFIX and set with_expat to PREFIX, or 'yes' if PREFIX
dnl has not been specified. Also HAVE_LIBEXPAT, HAVE_EXPAT_H are defined.
dnl If --with-expat has not been specified, set with_expat to 'no'.
dnl In addition, an Automake conditional EXPAT_INSTALLED is set accordingly.
dnl This is necessary to adapt a whole lot of packages that have expat
dnl bundled as a static library.
AC_DEFUN([AM_WITH_EXPAT],
[ AC_ARG_WITH(expat,
	      [  --with-expat=PREFIX     Use system Expat library],
	      , with_expat=no)

AM_CONDITIONAL(EXPAT_INSTALLED, test $with_expat != no)

EXPAT_CFLAGS=
  EXPAT_LIBS=
  if test $with_expat != no; then
	if test $with_expat != yes; then
		EXPAT_CFLAGS="-I$with_expat/include"
		EXPAT_LIBS="-L$with_expat/lib"
	fi
	AC_CHECK_LIB(expat, XML_ParserCreate,
		     [ EXPAT_LIBS="$EXPAT_LIBS -lexpat"
		       expat_found=yes ],
		     [ expat_found=no ],
		     "$EXPAT_LIBS")
	if test $expat_found = no; then
		AC_MSG_ERROR([Could not find the Expat library])
	fi
	expat_save_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $EXPAT_CFLAGS"
	AC_CHECK_HEADERS(expat.h, , expat_found=no)
	if test $expat_found = no; then
		AC_MSG_ERROR([Could not find expat.h])
	fi
	CFLAGS="$expat_save_CFLAGS"
  fi

AC_SUBST(EXPAT_CFLAGS)
  AC_SUBST(EXPAT_LIBS)
])

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