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| author | Paolo Carlini <paolo.carlini@oracle.com> | 2008-08-24 09:37:07 +0000 |
|---|---|---|
| committer | Paolo Carlini <paolo@gcc.gnu.org> | 2008-08-24 09:37:07 +0000 |
| commit | 6c3385c1dd9eab5144207076542c877e2cc9cf02 (patch) | |
| tree | e2c4e892ccdc1b14cde827043cdc74499fdbcc3d | |
| parent | 5c69a0dfdd1626358832b68a3d60afc00ee8429f (diff) | |
| download | gcc-6c3385c1dd9eab5144207076542c877e2cc9cf02.zip gcc-6c3385c1dd9eab5144207076542c877e2cc9cf02.tar.gz gcc-6c3385c1dd9eab5144207076542c877e2cc9cf02.tar.bz2 | |
acinclude.m4 ([GLIBCXX_ENABLE_CLOCK_GETTIME]): Improve documentation.
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
| -rw-r--r-- | libstdc++-v3/ChangeLog | 5 | ||||
| -rw-r--r-- | libstdc++-v3/acinclude.m4 | 11 | ||||
| -rw-r--r-- | libstdc++-v3/doc/xml/manual/configure.xml | 18 |
3 files changed, 19 insertions, 15 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 8a101d3..48e0352 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -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 diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index ade3f17..7c854ec 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -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 diff --git a/libstdc++-v3/doc/xml/manual/configure.xml b/libstdc++-v3/doc/xml/manual/configure.xml index 6ea9d1a..b30b0d0 100644 --- a/libstdc++-v3/doc/xml/manual/configure.xml +++ b/libstdc++-v3/doc/xml/manual/configure.xml @@ -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> |