On 17/11/20 10:47 +0100, Rainer Orth wrote:
I recently noticed that neither libposix4 nor librt are needed on
Solaris 11 any longer:
* libposix4 was renamed to librt in Solaris 7 back in 1998.
* librt was folded into libc in the OpenSolaris timeframe, leaving librt
only as a filter on libc. Thus, it's no longer needed on either
Solaris 11 or Illumos.
The following patch removes both uses. At the same time, Ada's use of
libthread has gone: it was folded into libc in Solaris 10 already.
TIME_LIBRARY and friends in g++ are likewise removed: Solaris was the
only user.
Bootstrapped without regressions on i386-pc-solaris2.11,
sparc-sun-solaris2.11, and x86_64-pc-linux-gnu.
Ok for master?
There are two more uses of librt left:
* On glibc targets before 2.17 it's needed for clock_gettime. I've no
idea how long gcc is supposed to support such targets (glibc 2.17 was
released in December 2012).
RHEL 7 uses glibc 2.17, so it will still be in use for some time.
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -1381,8 +1381,8 @@ dnl
dnl --enable-libstdcxx-time
dnl --enable-libstdcxx-time=yes
dnl checks for the availability of monotonic and realtime clocks,
-dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
-dnl links in the latter.
+dnl nanosleep and sched_yield in libc and, if needed, links in the
+dnl latter.
"The latter" was referring to libposix4, and we always link to libc,
so "if needed" doesn't apply to it.
So I think it should be:
dnl checks for the availability of monotonic and realtime clocks,
-dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
-dnl links in the latter.
+dnl nanosleep and sched_yield in libc.
diff --git a/libstdc++-v3/doc/xml/manual/configure.xml
b/libstdc++-v3/doc/xml/manual/configure.xml
--- a/libstdc++-v3/doc/xml/manual/configure.xml
+++ b/libstdc++-v3/doc/xml/manual/configure.xml
@@ -171,7 +171,7 @@
<function>sched_yield</function> functions, used in the
implementation of [thread.thread.this] of the 2011 ISO C++ standard.
The choice OPTION=yes checks for the availability of the facilities
- in libc and libposix4. In case it's needed the latter is also linked
+ in libc. In case it's needed the latter is also linked
to libstdc++ as part of the build process. OPTION=rt also checks in
Similarly, the whole "In case it's needed the latter is also linked to
libstdc++ as part of the build process." sentence should be removed. It
only applied to libposix4.
librt (and, if it's needed, links to it). Note that linking to librt
is not always desirable because for glibc it requires linking to
The libstdc++ part is OK with those adjustments. Thanks for doing
this, it's really helpful to trim these checks so the unnecessary
parts don't hang around indefinitely.
