default), and other portions using the GNU style (cperl-mode's
default). Write new code using GNU style.
-* Don't use & for function calls, unless required.
+* Don't use & for function calls, unless really required.
The use of & prevents prototypes from being checked.
- Just as above, don't change massively all the code to strip the
- &, just convert the old code as you work on it, and write new
- code without.
+ ============================================================================
+ = Automake versioning and compatibility scheme
+
+ * There are three kinds of automake releases:
+
+ - new major releases (e.g., 2.0, 5.0)
+ - new minor releases (e.g., 1.14, 2.1)
+ - micro a.k.a. "bug-fixing" releases (e.g., 1.13.2, 2.0.1, 3.5.17).
+
+ A new major release should have the major version number bumped, and
+ the minor and micro version numbers reset to zero. A new minor release
+ should have the major version number unchanged, the minor version number
+ bumped, and the micro version number reset to zero. Finally, a new
+ micro version should have the major and minor version numbers unchanged,
+ and the micro version number bumped.
+
+ For example, the first minor version after 1.13.2 will be 1.14; the
+ first bug-fixing version after 1.14 that will be 1.14.1; the first
+ new major version after all such releases will be 2.0; the first
+ bug-fixing version after 2.0 will be 2.0.1; and a further bug-fixing
+ version after 2.0.1 will be 2.0.2.
+
+ * Micro releases should be just bug-fixing releases; no new features
+ should be added, and ideally, only trivial bugs, recent regressions,
+ or documentation issues should be addressed by them.
+
+ * Minor releases can introduce new "safe" features, do non-trivial
+ but mostly safe code clean-ups, and even add new runtime warnings
+ (rigorously non-fatal); but they shouldn't include any backward
+ incompatible change, nor contain any potentially destabilizing
+ refactoring or sweeping change, nor introduce new features whose
+ implementation might be liable to cause bugs or regressions in
+ existing code.
+
+ * Major releases can introduce backward-incompatibilities (albeit
+ such incompatibilities should be announced well in advance, and
+ a smooth transition plan prepared for them), and try more risking
+ and daring refactorings and code cleanups.
+
+ * For more information, refer to the extensive discussion associated
+ with automake bug#13578.
+
============================================================================
= Working with git
is installed in the /usr/local hierarchy), a definition of the
AM_PROG_VALAC macro found in '/usr/local/share/aclocal/my-vala.m4'
should take precedence over the same-named automake-provided macro
- (defined in '/usr/local/share/aclocal-1.14/vala.m4').
+ (defined in '/usr/local/share/aclocal-2.0/vala.m4').
+
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+ New in 1.13.2:
-* Obsolescent features:
+* 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.
+
+* Texinfo support:
+
+ - Automake can now be instructed to place '.info' files generated from
+ Texinfo input in the builddir rather than in the srcdir; this is done
+ specifying the new automake option 'info-in-builddir'. This feature
+ was requested by the developers of GCC, GDB, GNU binutils and the GNU
+ bfd library. See the extensive discussion about automake bug#11034
+ for more details.
+
+ - For quite a long time, Automake has been implementing an undocumented
+ hack which ensured that '.info' files which appeared to be cleaned
+ (by e.g. being listed in the CLEANFILES or DISTCLEANFILES variables)
+ were built in the builddir rather than in the srcdir; this hack was
+ introduced to ensure better backward-compatibility with packages such
+ as Texinfo, which did things like:
+
+ info_TEXINFOS = texinfo.txi info-stnd.texi info.texi
+ DISTCLEANFILES = texinfo texinfo-* info*.info*
+ # Do not create info files for distribution.
+ dist-info:
+ @:
+
+ in order not to distribute generated '.info' files.
+
+ Now that we have the 'info-in-builddir' option that explicitly causes
+ generated '.info' files to be placed in the builddir, this hack should
+ be longer necessary, so we deprecate it with runtime warnings. It will
+ likely be removed altogether in Automake 1.14.
- - 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.
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- - 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.
+New in 1.13.2:
* Documentation fixes:
projects / thirdparty / automake.git / commitdiff
