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).
* On HP-UX, it is needed for sem_init in libgomp and various specs for
-fopenmp etc. There are no public HP-UX systems in the compile farm,
and the sem_init(2) man page in the public docs on hpe.com was just a
dangling link, so I cannot tell if this is still true.
Rainer
--
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University
2020-11-16 Rainer Orth <r...@cebitec.uni-bielefeld.de>
gcc/cp:
* g++spec.c (TIMELIB, TIME_LIBRARY): Remove.
(lang_specific_driver): Remove TIME_LIBRARY handling.
gcc:
* config/sol2.h (TIME_LIBRARY): Remove.
libstdc++-v3:
* acinclude.m4 (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Remove libposix4
references.
<solaris*>: Don't use -lrt any longer.
* configure: Regenerate.
* doc/xml/manual/configure.xml (--enable-libstdcxx-time=OPTION):
Remove libposix4 reference.
gcc/ada:
* Makefile.rtl <sparc*-sun-solaris*> (THREADSLIB): Remove.
(MISCLIB): Remove -lposix4.
<*86-*-solaris2*>: Likewise.
* libgnarl/s-osinte__solaris.ads (System.OS_Interface): Remove
-lposix4 -lthread.
# HG changeset patch
# Parent aea7401c4d83f8a1fd609b22ec7a9131c857c98d
ada: c++: Get rid of libposix4, librt on Solaris
diff --git a/gcc/ada/Makefile.rtl b/gcc/ada/Makefile.rtl
--- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -1641,8 +1641,7 @@ ifeq ($(strip $(filter-out sparc% sun so
endif
EH_MECHANISM=-gcc
- THREADSLIB = -lposix4 -lthread
- MISCLIB = -lposix4 -lnsl -lsocket
+ MISCLIB = -lnsl -lsocket
SO_OPTS = -Wl,-h,
GNATLIB_SHARED = gnatlib-shared-dual
GMEM_LIB = gmemlib
@@ -1695,8 +1694,7 @@ ifeq ($(strip $(filter-out %86 %x86_64 s
EXTRA_GNATRTL_NONTASKING_OBJS += $(TRASYM_DWARF_UNIX_OBJS)
EH_MECHANISM=-gcc
- THREADSLIB = -lposix4 -lthread
- MISCLIB = -lposix4 -lnsl -lsocket
+ MISCLIB = -lnsl -lsocket
SO_OPTS = -Wl,-h,
GNATLIB_SHARED = gnatlib-shared-dual
GMEM_LIB = gmemlib
diff --git a/gcc/ada/libgnarl/s-osinte__solaris.ads b/gcc/ada/libgnarl/s-osinte__solaris.ads
--- a/gcc/ada/libgnarl/s-osinte__solaris.ads
+++ b/gcc/ada/libgnarl/s-osinte__solaris.ads
@@ -45,9 +45,6 @@ with Ada.Unchecked_Conversion;
package System.OS_Interface is
pragma Preelaborate;
- pragma Linker_Options ("-lposix4");
- pragma Linker_Options ("-lthread");
-
subtype int is Interfaces.C.int;
subtype short is Interfaces.C.short;
subtype long is Interfaces.C.long;
diff --git a/gcc/config/sol2.h b/gcc/config/sol2.h
--- a/gcc/config/sol2.h
+++ b/gcc/config/sol2.h
@@ -381,9 +381,6 @@ along with GCC; see the file COPYING3.
{ "endfile_vtv", ENDFILE_VTV_SPEC }, \
SUBTARGET_CPU_EXTRA_SPECS
-/* C++11 programs need -lrt for nanosleep. */
-#define TIME_LIBRARY "rt"
-
#ifndef USE_GLD
/* With Sun ld, -rdynamic is a no-op. */
#define RDYNAMIC_SPEC ""
diff --git a/gcc/cp/g++spec.c b/gcc/cp/g++spec.c
--- a/gcc/cp/g++spec.c
+++ b/gcc/cp/g++spec.c
@@ -27,12 +27,10 @@ along with GCC; see the file COPYING3.
#define LANGSPEC (1<<1)
/* This bit is set if they did `-lm' or `-lmath'. */
#define MATHLIB (1<<2)
-/* This bit is set if they did `-lrt' or equivalent. */
-#define TIMELIB (1<<3)
/* This bit is set if they did `-lc'. */
-#define WITHLIBC (1<<4)
+#define WITHLIBC (1<<3)
/* Skip this option. */
-#define SKIPOPT (1<<5)
+#define SKIPOPT (1<<4)
#ifndef MATH_LIBRARY
#define MATH_LIBRARY "m"
@@ -41,10 +39,6 @@ along with GCC; see the file COPYING3.
#define MATH_LIBRARY_PROFILE MATH_LIBRARY
#endif
-#ifndef TIME_LIBRARY
-#define TIME_LIBRARY ""
-#endif
-
#ifndef LIBSTDCXX
#define LIBSTDCXX "stdc++"
#endif
@@ -95,15 +89,12 @@ lang_specific_driver (struct cl_decoded_
const struct cl_decoded_option *saw_libc = NULL;
/* An array used to flag each argument that needs a bit set for
- LANGSPEC, MATHLIB, TIMELIB, or WITHLIBC. */
+ LANGSPEC, MATHLIB, or WITHLIBC. */
int *args;
/* By default, we throw on the math library if we have one. */
int need_math = (MATH_LIBRARY[0] != '\0');
- /* By default, we throw on the time library if we have one. */
- int need_time = (TIME_LIBRARY[0] != '\0');
-
/* True if we saw -static. */
int static_link = 0;
@@ -147,11 +138,6 @@ lang_specific_driver (struct cl_decoded_
args[i] |= MATHLIB;
need_math = 0;
}
- else if (strcmp (arg, TIME_LIBRARY) == 0)
- {
- args[i] |= TIMELIB;
- need_time = 0;
- }
else if (strcmp (arg, "c") == 0)
args[i] |= WITHLIBC;
else
@@ -285,12 +271,6 @@ lang_specific_driver (struct cl_decoded_
saw_math = &decoded_options[i];
}
- if (!saw_time && (args[i] & TIMELIB) && library > 0)
- {
- --j;
- saw_time = &decoded_options[i];
- }
-
if (!saw_libc && (args[i] & WITHLIBC) && library > 0)
{
--j;
@@ -377,13 +357,6 @@ lang_specific_driver (struct cl_decoded_
}
if (saw_time)
new_decoded_options[j++] = *saw_time;
- else if (library > 0 && need_time)
- {
- generate_option (OPT_l, TIME_LIBRARY, 1, CL_DRIVER,
- &new_decoded_options[j]);
- added_libraries++;
- j++;
- }
if (saw_libc)
new_decoded_options[j++] = *saw_libc;
if (shared_libgcc && !static_link)
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.
dnl --enable-libstdcxx-time=rt
dnl also searches (and, if needed, links) librt. Note that this is
dnl not always desirable because, in glibc 2.16 and earlier, for
@@ -1455,7 +1455,6 @@ AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME]
ac_has_nanosleep=yes
;;
solaris*)
- GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
ac_has_clock_monotonic=yes
ac_has_clock_realtime=yes
ac_has_nanosleep=yes
@@ -1469,11 +1468,11 @@ AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME]
elif test x"$enable_libstdcxx_time" != x"no"; then
if test x"$enable_libstdcxx_time" = x"rt"; then
- AC_SEARCH_LIBS(clock_gettime, [rt posix4])
- AC_SEARCH_LIBS(nanosleep, [rt posix4])
+ AC_SEARCH_LIBS(clock_gettime, [rt])
+ AC_SEARCH_LIBS(nanosleep, [rt])
else
- AC_SEARCH_LIBS(clock_gettime, [posix4])
- AC_SEARCH_LIBS(nanosleep, [posix4])
+ AC_CHECK_FUNC(clock_gettime)
+ AC_CHECK_FUNC(nanosleep)
fi
case "$ac_cv_search_clock_gettime" in
@@ -1485,13 +1484,9 @@ AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME]
;;
esac
- AC_SEARCH_LIBS(sched_yield, [rt posix4])
+ AC_SEARCH_LIBS(sched_yield, [rt])
case "$ac_cv_search_sched_yield" in
- -lposix4*)
- GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
- ac_has_sched_yield=yes
- ;;
-lrt*)
if test x"$enable_libstdcxx_time" = x"rt"; then
GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
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
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
