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Single suffix rules and seperated dependencies are not portable.
* doc/autoconf.texi (Installation Directory Variables): Update. (Limitations of Make): Some about `Single Suffix Rules and Separated Dependencies'. * bin/Makefile.am (autoconf, autoheader, autoreconf, autoupdate) (ifnames, autoscan, autom4te): Un-factor into several rules.
This commit is contained in:
Akim Demaille
parent
5ab96b3b06
commit
906c694837
10
ChangeLog
10
ChangeLog
@ -1,3 +1,13 @@
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2002-09-26 Akim Demaille <akim@epita.fr>
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Single suffix rules and seperated dependencies are not portable.
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* doc/autoconf.texi (Installation Directory Variables): Update.
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(Limitations of Make): Some about `Single Suffix Rules and
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Separated Dependencies'.
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* bin/Makefile.am (autoconf, autoheader, autoreconf, autoupdate)
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(ifnames, autoscan, autom4te): Un-factor into several rules.
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2002-09-25 Paul Eggert <eggert@twinsun.com>
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* BUGS (Interoperability bugs): New section. Mention libtool
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5
NEWS
5
NEWS
@ -1,5 +1,10 @@
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* Major changes in Autoconf 2.54a -*- outline -*-
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** Bug Fixes
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- Portability of the Autoconf package to Solaris.
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* Major changes in Autoconf 2.54
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Released September 13th, 2002.
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@ -54,11 +54,47 @@ $(srcdir)/autoconf.in: $(srcdir)/autoconf.as $(m4sh_m4f_dependencies)
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## All the files below depend on Makefile so that they are rebuilt
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## when the prefix etc. changes.
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autoconf autoheader autoreconf autoupdate ifnames autoscan autom4te: Makefile
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rm -f $@ $@.tmp
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$(edit) $@.in >$@.tmp
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chmod +x $@.tmp
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mv $@.tmp $@
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autoconf: autoconf.in Makefile
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rm -f autoconf autoconf.tmp
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$(edit) autoconf.in >autoconf.tmp
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chmod +x autoconf.tmp
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mv autoconf.tmp autoconf
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autoheader: autoheader.in Makefile
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rm -f autoheader autoheader.tmp
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$(edit) autoheader.in >autoheader.tmp
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chmod +x autoheader.tmp
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mv autoheader.tmp autoheader
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autom4te: autom4te.in Makefile
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rm -f autom4te autom4te.tmp
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$(edit) autom4te.in >autom4te.tmp
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chmod +x autom4te.tmp
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mv autom4te.tmp autom4te
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autoreconf: autoreconf.in Makefile
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rm -f autoreconf autoreconf.tmp
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$(edit) autoreconf.in >autoreconf.tmp
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chmod +x autoreconf.tmp
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mv autoreconf.tmp autoreconf
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autoscan: autoscan.in Makefile
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rm -f autoscan autoscan.tmp
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$(edit) autoscan.in >autoscan.tmp
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chmod +x autoscan.tmp
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mv autoscan.tmp autoscan
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autoupdate: autoupdate.in Makefile
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rm -f autoupdate autoupdate.tmp
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$(edit) autoupdate.in >autoupdate.tmp
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chmod +x autoupdate.tmp
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mv autoupdate.tmp autoupdate
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ifnames: ifnames.in Makefile
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rm -f ifnames ifnames.tmp
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$(edit) ifnames.in >ifnames.tmp
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chmod +x ifnames.tmp
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mv ifnames.tmp ifnames
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@ -121,8 +121,6 @@ edit = sed \
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# autoconf is written in M4sh.
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AUTOM4SH = $(top_builddir)/tests/autom4te --language M4sh
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SUFFIXES = .in
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TAGS_DEPENDENCIES = $(EXTRA_DIST)
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letters = abcdefghijklmnopqrstuvwxyz
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@ -147,7 +145,6 @@ DIST_COMMON = Makefile.am Makefile.in
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all: all-am
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.SUFFIXES:
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.SUFFIXES: .in
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$(srcdir)/Makefile.in: Makefile.am $(top_srcdir)/configure.ac $(ACLOCAL_M4)
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cd $(top_srcdir) && \
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$(AUTOMAKE) --gnu bin/Makefile
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@ -346,12 +343,48 @@ uninstall-am: uninstall-binSCRIPTS uninstall-info-am
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$(srcdir)/autoconf.in: $(srcdir)/autoconf.as $(m4sh_m4f_dependencies)
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$(AUTOM4SH) $(srcdir)/autoconf.as -o $@
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autoconf autoheader autoreconf autoupdate ifnames autoscan autom4te: Makefile
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.in:
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rm -f $@ $@.tmp
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$(edit) $< >$@.tmp
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chmod +x $@.tmp
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mv $@.tmp $@
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autoconf: autoconf.in Makefile
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rm -f autoconf autoconf.tmp
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$(edit) autoconf.in >autoconf.tmp
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chmod +x autoconf.tmp
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mv autoconf.tmp autoconf
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autoheader: autoheader.in Makefile
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rm -f autoheader autoheader.tmp
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$(edit) autoheader.in >autoheader.tmp
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chmod +x autoheader.tmp
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mv autoheader.tmp autoheader
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autom4te: autom4te.in Makefile
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rm -f autom4te autom4te.tmp
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$(edit) autom4te.in >autom4te.tmp
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chmod +x autom4te.tmp
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mv autom4te.tmp autom4te
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autoreconf: autoreconf.in Makefile
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rm -f autoreconf autoreconf.tmp
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$(edit) autoreconf.in >autoreconf.tmp
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chmod +x autoreconf.tmp
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mv autoreconf.tmp autoreconf
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autoscan: autoscan.in Makefile
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rm -f autoscan autoscan.tmp
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$(edit) autoscan.in >autoscan.tmp
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chmod +x autoscan.tmp
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mv autoscan.tmp autoscan
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autoupdate: autoupdate.in Makefile
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rm -f autoupdate autoupdate.tmp
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$(edit) autoupdate.in >autoupdate.tmp
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chmod +x autoupdate.tmp
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mv autoupdate.tmp autoupdate
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ifnames: ifnames.in Makefile
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rm -f ifnames ifnames.tmp
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$(edit) ifnames.in >ifnames.tmp
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chmod +x ifnames.tmp
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mv ifnames.tmp ifnames
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# Tell versions [3.59,3.63) of GNU make to not export all variables.
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# Otherwise a system limit (for SysV at least) may be exceeded.
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.NOEXPORT:
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@ -2245,17 +2245,24 @@ edit = sed \
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-e 's,@@prefix\@@,$(prefix),g'
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@end group
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autoconf autoheader: Makefile
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@group
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.in:
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rm -f $@@ $@@.tmp
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$(edit) $< >$@@.tmp
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chmod +x $@@.tmp
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mv $@@.tmp $@@
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autoconf: Makefile autoconf.in
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rm -f autoconf autoconf.tmp
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$(edit) $< >autoconf.tmp
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chmod +x autoconf.tmp
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mv autoconf.tmp autoconf
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@end group
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@group
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autoheader: Makefile autoheader.in
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rm -f autoheader autoheader.tmp
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$(edit) $< >autoheader.tmp
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chmod +x autoheader.tmp
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mv autoheader.tmp autoheader
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@end group
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@end example
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Five details are noteworthy:
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Some details are noteworthy:
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@table @samp
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@item @@datadir\@@
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@ -2276,16 +2283,22 @@ Since @code{edit} uses values that depend on the configuration specific
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values (@code{prefix} etc.) and not only on @code{VERSION} and so forth,
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the output depends on @file{Makefile}, not @file{configure.ac}.
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@item Separated dependency
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Don't write
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@item Separated dependencies and Single Suffix Rules
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You can't use them! The above snippet cannot be (portably) rewritten
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as:
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@example
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.in: Makefile
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@dots{}
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autoconf autoheader: Makefile
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@group
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.in:
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rm -f $@@ $@@.tmp
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$(edit) $< >$@@.tmp
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chmod +x $@@.tmp
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mv $@@.tmp $@@
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@end group
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@end example
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@noindent
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unless you really mean to create the file @file{.in} from @file{Makefile}.
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@xref{Limitations of Make}, for details.
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@end table
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@ -2395,15 +2408,16 @@ configuration-related dependencies.
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@cindex Configuration Header
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@cindex @file{config.h}
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When a package contains more than a few tests that define C preprocessor symbols, the command
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lines to pass @option{-D} options to the compiler can get quite long.
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This causes two problems. One is that the @command{make} output is hard to
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visually scan for errors. More seriously, the command lines can exceed
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the length limits of some operating systems. As an alternative to
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passing @option{-D} options to the compiler, @command{configure} scripts can
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create a C header file containing @samp{#define} directives. The
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@code{AC_CONFIG_HEADERS} macro selects this kind of output. It should
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be called right after @code{AC_INIT}.
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When a package contains more than a few tests that define C preprocessor
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symbols, the command lines to pass @option{-D} options to the compiler
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can get quite long. This causes two problems. One is that the
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@command{make} output is hard to visually scan for errors. More
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seriously, the command lines can exceed the length limits of some
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operating systems. As an alternative to passing @option{-D} options to
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the compiler, @command{configure} scripts can create a C header file
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containing @samp{#define} directives. The @code{AC_CONFIG_HEADERS}
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macro selects this kind of output. It should be called right after
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@code{AC_INIT}.
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The package should @samp{#include} the configuration header file before
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any other header files, to prevent inconsistencies in declarations (for
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@ -10957,8 +10971,71 @@ cp ../bar.x bar.y
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% @kbd{pmake} # BSD make
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cp ../bar.x bar.y
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@end example
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@end table
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@c end item about VPATH
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@item Single Suffix Rules and Separated Dependencies
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@cindex Single Suffix Inference Rule
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@cindex Rule, Single Suffix Inference
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A @dfn{Single Suffix Rule} is basically a usual suffix (inference) rule
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(@samp{.from.to:}), but which @emph{destination} suffix is empty
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(@samp{.from:}).
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@cindex Separated Dependencies
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@dfn{Separated dependencies} simply refers to listing the prerequisite
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of a target, without defining a rule. Usually one can list on the one
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hand side, the rules, and on the other hand side, the dependencies.
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Solaris @command{make} does not support separated dependencies for
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targets defined by single suffix rules:
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@example
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$ @kbd{cat Makefile}
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.SUFFIXES: .in
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foo: foo.in
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.in:
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cp $< $@
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$ @kbd{touch foo.in}
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$ @kbd{make}
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$ @kbd{ls}
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Makefile foo.in
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@end example
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@noindent
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while @acronym{GNU} Make does:
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@example
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$ @kbd{gmake}
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cp foo.in foo
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$ @kbd{ls}
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Makefile foo foo.in
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@end example
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Note it works without the @samp{foo: foo.in} dependency.
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@example
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$ @kbd{cat Makefile}
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.SUFFIXES: .in
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.in:
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cp $< $@
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$ @kbd{make foo}
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cp foo.in foo
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@end example
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@noindent
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and it works with double suffix inference rules:
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@example
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$ @kbd{cat Makefile}
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foo.out: foo.in
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.SUFFIXES: .in .out
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.in.out:
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cp $< $@
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$ @kbd{make}
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cp foo.in foo.out
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@end example
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As a result, in such a case, you have to write target rules.
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@end table
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