Major changes in release 1.8:
+** New macros:
* New macros AC_LANG_C, AC_LANG_CPLUSPLUS, AC_LANG_SAVE, AC_LANG_RESTORE,
AC_PROG_CXX, AC_PROG_CXXCPP, AC_REQUIRE_CPP
for checking both C++ and C features in one configure script.
* New macros AC_CHECKING, AC_VERBOSE, AC_WARN, AC_ERROR for printing messages.
* New macros AC_FIND_XTRA, AC_MMAP, AC_SIZEOF_TYPE, AC_PREREQ, AC_SET_MAKE.
+
+** Changed macros:
* AC_FIND_X looks for X in more places.
* AC_PROG_INSTALL defaults to install.sh instead of cp, if it's in srcdir.
install.sh is distributed with Autoconf.
* AC_DECLARE_YYTEXT has been removed because it can't work, pending
a rewrite of quoting in AC_DEFINE.
* AC_OUTPUT adds its comments in C format when substituting in C files.
-* Relative srcdir values are not made absolute.
-* The values of @prefix@ and @exec_prefix@ get substituted.
+* AC_COMPILE_CHECK protects its ECHO-TEXT argument with double quotes.
+
+** New or changed command line options:
* configure accepts --enable-FEATURE[=VAL] option; new macro AC_ENABLE.
+* configure accepts --without-PACKAGE; giving --with-PACKAGE an
+ argument is deprecated, and gives $withval a value of `yes' instead
+ of `1' by default for --with-, and `no' for --without-.
* configure accepts --help, --version, --silent/--quiet options.
* configure accepts and ignores most other Cygnus configure options, and
warns about unknown options.
* config.status accepts --help, --version options.
+
+** Paths and other changes:
+* Relative srcdir values are not made absolute.
+* The values of @prefix@ and @exec_prefix@ get substituted.
* Autoconf library files are installed in ${datadir}/autoconf, not ${datadir}.
* autoheader optionally copies config.h.top to the beginning of config.h.in.
* Namespace cleanup: all shell variables used internally by Autoconf