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![Marko Mäkelä](/assets/img/avatar_default.png)
On clang, use __builtin_readcyclecounter() when available. Hinted by Sergey Vojtovich. (This may lead to runtime failure on ARM systems. The hardware should be available on ARMv8 (AArch64), but access to it may require special privileges.) We remove support for the proprietary Sun Microsystems compiler, and rely on clang or the __GNUC__ assembler syntax instead. For now, we retain support for IA-64 (Itanium) and 32-bit SPARC, even though those platforms are likely no longer widely used. We remove support for clock_gettime(CLOCK_SGI_CYCLE), because Silicon Graphics ceased supporting IRIX in December 2013. This was the only cycle timer interface available for MIPS. On PowerPC, we rely on the GCC 4.8 __builtin_ppc_get_timebase() (or clang __builtin_readcyclecounter()), which should be equivalent to the old assembler code on both 64-bit and 32-bit targets.
100 lines
3.2 KiB
CMake
100 lines
3.2 KiB
CMake
# Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA
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INCLUDE(CheckSymbolExists)
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INCLUDE(CheckCSourceRuns)
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INCLUDE(CheckCSourceCompiles)
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# Enable 64 bit file offsets
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SET(_FILE_OFFSET_BITS 64)
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# Legacy option, without it my_pthread is having problems
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ADD_DEFINITIONS(-DHAVE_RWLOCK_T)
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# On Solaris, use of intrinsics will screw the lib search logic
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# Force using -lm, so rint etc are found.
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SET(LIBM m)
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# CMake defined -lthread as thread flag. This crashes in dlopen
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# when trying to load plugins workaround with -lpthread
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SET(CMAKE_THREADS_LIBS_INIT -lpthread CACHE INTERNAL "" FORCE)
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# Solaris specific large page support
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CHECK_SYMBOL_EXISTS(MHA_MAPSIZE_VA sys/mman.h HAVE_DECL_MHA_MAPSIZE_VA)
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IF(HAVE_DECL_MHA_MAPSIZE_VA)
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SET(HAVE_SOLARIS_LARGE_PAGES 1)
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SET(HAVE_LARGE_PAGE_OPTION 1)
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ENDIF()
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# Solaris atomics
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CHECK_C_SOURCE_RUNS(
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"
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#include <atomic.h>
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int main()
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{
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int foo = -10; int bar = 10;
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int64_t foo64 = -10; int64_t bar64 = 10;
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if (atomic_add_int_nv((uint_t *)&foo, bar) || foo)
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return -1;
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bar = atomic_swap_uint((uint_t *)&foo, (uint_t)bar);
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if (bar || foo != 10)
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return -1;
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bar = atomic_cas_uint((uint_t *)&bar, (uint_t)foo, 15);
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if (bar)
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return -1;
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if (atomic_add_64_nv((volatile uint64_t *)&foo64, bar64) || foo64)
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return -1;
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bar64 = atomic_swap_64((volatile uint64_t *)&foo64, (uint64_t)bar64);
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if (bar64 || foo64 != 10)
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return -1;
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bar64 = atomic_cas_64((volatile uint64_t *)&bar64, (uint_t)foo64, 15);
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if (bar64)
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return -1;
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atomic_or_64((volatile uint64_t *)&bar64, 0);
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return 0;
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}
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" HAVE_SOLARIS_ATOMIC)
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# Check is special processor flag needs to be set on older GCC
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#that defaults to v8 sparc . Code here is taken from my_rdtsc.h
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IF(CMAKE_COMPILER_IS_GNUCC AND CMAKE_SIZEOF_VOID_P EQUAL 4
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AND CMAKE_SYSTEM_PROCESSOR MATCHES "sparc")
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SET(SOURCE
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"
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int main()
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{
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long high\;
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long low\;
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__asm __volatile__ (\"rd %%tick,%1\; srlx %1,32,%0\" : \"=r\" ( high), \"=r\" (low))\;
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return 0\;
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} ")
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CHECK_C_SOURCE_COMPILES(${SOURCE} HAVE_SPARC32_TICK)
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IF(NOT HAVE_SPARC32_TICK)
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SET(CMAKE_REQUIRED_FLAGS "-mcpu=v9")
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CHECK_C_SOURCE_COMPILES(${SOURCE} HAVE_SPARC32_TICK_WITH_V9)
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SET(CMAKE_REQUIRED_FLAGS)
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IF(HAVE_SPARC32_TICK_WITH_V9)
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SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mcpu=v9")
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SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=v9")
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ENDIF()
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ENDIF()
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ENDIF()
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IF(CMAKE_CXX_COMPILER_ID MATCHES "SunPro")
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# Unnamed structs and unions
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SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -features=extensions")
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ENDIF()
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