should take precedence over the same-named automake-provided macro
(defined in '/usr/local/share/aclocal-1.14/vala.m4').
+* C compilation, and the AC_PROG_CC and AM_PROG_CC_C_O macros:
+
+ - The 'compile' script is now unconditionally required for all
+ packages that perform C compilation (note that if you are using
+ the '--add-missing' option, automake will fetch that script for
+ you, so you shouldn't need any explicit adjustment).
+ This new behaviour is needed to avoid obscure errors when the
+ 'subdir-objects' option is used, and the compiler is an inferior
+ one that doesn't grasp the combined use of both the "-c -o"
+ options; see discussion about automake bug#13378 for more details:
+ <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13378#35>
+ <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13378#44>
+
+ - Automake will automatically enhance the AC_PROG_CC autoconf macro
+ to make it check, at configure time, that the C compiler supports
+ the combined use of both the "-c -o" options. This "rewrite" of
+ AC_PROG_CC is only meant to be temporary, since future Autoconf
+ versions should provide all the features Automake needs.
+
+ - The AM_PROG_CC_C_O is no longer useful, and its use is a no-op
+ now. Future Automake versions might start warning that this
+ macro is obsolete. For better backward-compatibility, this macro
+ still sets a proper 'ac_cv_prog_cc_*_c_o' cache variable, and
+ define the 'NO_MINUS_C_MINUS_O' C preprocessor symbol, but you
+ should really stop relying on that.
+
+* Obsolescent features:
+
+ - Use of suffix-less info files (that can be specified through the
+ '@setfilename' macro in Texinfo input files) is discouraged, and
+ its use will raise warnings in the 'obsolete' category. Simply
+ use the '.info' extension for all your info files, transforming
+ usages like:
+
+ @setfilename myprogram
+
+ into:
+
+ @setfilename myprogram.info
+
+ - Use of Texinfo input files with '.txi' or '.texinfo' extensions
+ is discouraged, and its use will raise warnings in the 'obsolete'
+ category. You are advised to simply use the '.texi' extension
+ instead.
+
+* Documentation fixes:
+
+ - The long-deprecated but still supported two-arguments invocation form
+ of AM_INIT_AUTOMAKE is documented once again. This seems the sanest
+ thing to do, given that support for such an usage might need to remain
+ in place for a unspecified amount of time in order to cater for people
+ who want to define the version number for their package dynamically at
+ configure runtime (unfortunately, Autoconf does not yet support this
+ scenario, so we cannot delegate the work to it).
+
* Texinfo support:
- Automake can now be instructed to place '.info' files generated from
projects / platform / upstream / automake.git / blobdiff