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acinclude.m4 ([GLIBCXX_ENABLE_CLOCK_GETTIME]): Improve documentation.

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2008-08-24  Paolo Carlini  <paolo.carlini@oracle.com>

	* acinclude.m4 ([GLIBCXX_ENABLE_CLOCK_GETTIME]): Improve documentation.
	* doc/xml/manual/configure.xml: Likewise.

From-SVN: r139533
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Paolo Carlini 2008-08-24 09:37:07 +00:00 • committed by Paolo Carlini
parent 5c69a0dfdd
commit 6c3385c1dd
3 changed files with 19 additions and 15 deletions
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5
libstdc++-v3/ChangeLog
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@ -1,3 +1,8 @@
2008-08-24 Paolo Carlini <paolo.carlini@oracle.com>
* acinclude.m4 ([GLIBCXX_ENABLE_CLOCK_GETTIME]): Improve documentation.
* doc/xml/manual/configure.xml: Likewise.
2008-08-23 Paolo Carlini <paolo.carlini@oracle.com>
* acinclude.m4 ([GLIBCXX_ENABLE_CLOCK_GETTIME]): Use [=KIND] in

11
libstdc++-v3/acinclude.m4
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@ -1079,14 +1079,13 @@ dnl [time.clock] in the current C++0x working draft.
dnl
dnl --enable-clock-gettime
dnl --enable-clock-gettime=yes
dnl checks for the availability of monotonic or realtime clocks
dnl in libc and libposix4
dnl checks for the availability of monotonic and realtime clocks
dnl in libc and libposix4 and in case links the latter
dnl --enable-clock-gettime=rt
dnl searches librt too, and in case of success enables its linking
dnl to libstdc++ as part of the build process. Note that this is
dnl also searches (and, in case, links) librt. Note that this is
dnl not always desirable because, in glibc, for example, in turn it
dnl triggers automatically the linking of libpthread too, which
dnl activates locking, a large overhead for single-thread programs.
dnl triggers the linking of libpthread too, which activates locking,
dnl a large overhead for single-thread programs.
dnl --enable-clock-gettime=no
dnl --disable-clock-gettime
dnl disables the checks completely

18
libstdc++-v3/doc/xml/manual/configure.xml
View file

@ -320,16 +320,16 @@
</listitem></varlistentry>
<varlistentry><term><code>--enable-clock-gettime=OPTION</code></term>
<listitem><para>Enables checks (link-type too) for the clock_gettime clocks,
used in the implementation [time.clock] in the current C++0x draft.
<listitem><para>Enables link-type checks for the availability of the
clock_gettime clocks, used in [time.clock] of the current C++0x draft.
The choice OPTION=yes checks for the availability of the monotonic and
realtime clocks in libc and libposix4. OPTION=rt searches librt too,
and in case of success enables its linking to libstdc++ as part of the
build process. Note that this is not always desirable because, in
glibc, for example, in turn it triggers automatically the linking of
libpthread too, which activates locking, a large overhead for
single-thread programs. OPTION=no skips the tests completely. The
default is OPTION=no.
realtime clocks in libc and libposix4. In case of need the latter is
also linked to libstdc++ as part of the build process. OPTION=rt
also searches (and, in case, links) librt. Note that the latter
is not always desirable because, in glibc, for example, in turn it
triggers the linking of libpthread too, which activates locking,
a large overhead for single-thread programs. OPTION=no skips the
tests completely. The default is OPTION=no.
</para>
</listitem></varlistentry>