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xz/cmake/tuklib_physmem.cmake

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Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 21:38:16 +00:00
#
# tuklib_physmem.cmake - see tuklib_physmem.m4 for description and comments
#
# NOTE: Compared tuklib_physmem.m4, this lacks support for Tru64, IRIX, and
# Linux sysinfo() (usually sysconf() is used on GNU/Linux).
#
# Author: Lasse Collin
#
Build: Fix bugs in the CMake files. Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25 18:42:31 +00:00
include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake")
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 21:38:16 +00:00
include(CheckCSourceCompiles)
include(CheckIncludeFile)
function(tuklib_physmem_internal_check)
# Shortcut on Windows:
if(WIN32 OR CYGWIN)
# Nothing to do, the tuklib_physmem.c handles it.
set(TUKLIB_PHYSMEM_DEFINITIONS "" CACHE INTERNAL "")
return()
endif()
# Full check for special cases:
check_c_source_compiles("
#if defined(_WIN32) || defined(__CYGWIN__) || defined(__OS2__) \
|| defined(__DJGPP__) || defined(__VMS) \
|| defined(AMIGA) || defined(__AROS__) || defined(__QNX__)
int main(void) { return 0; }
#else
compile error
#endif
"
TUKLIB_PHYSMEM_SPECIAL)
if(TUKLIB_PHYSMEM_SPECIAL)
# Nothing to do, the tuklib_physmem.c handles it.
set(TUKLIB_PHYSMEM_DEFINITIONS "" CACHE INTERNAL "")
return()
endif()
# Look for AIX-specific solution before sysconf(), because the test
# for sysconf() will pass on AIX but won't actually work
# (sysconf(_SC_PHYS_PAGES) compiles but always returns -1 on AIX).
check_c_source_compiles("
#include <sys/systemcfg.h>
int main(void)
{
(void)_system_configuration.physmem;
return 0;
}
"
TUKLIB_PHYSMEM_AIX)
if(TUKLIB_PHYSMEM_AIX)
set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_AIX" CACHE INTERNAL "")
return()
endif()
# sysconf()
check_c_source_compiles("
#include <unistd.h>
int main(void)
{
long i;
i = sysconf(_SC_PAGESIZE);
i = sysconf(_SC_PHYS_PAGES);
return 0;
}
"
TUKLIB_PHYSMEM_SYSCONF)
if(TUKLIB_PHYSMEM_SYSCONF)
set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_SYSCONF"
CACHE INTERNAL "")
return()
endif()
# sysctl()
check_include_file(sys/param.h HAVE_SYS_PARAM_H)
if(HAVE_SYS_PARAM_H)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_PARAM_H)
endif()
check_c_source_compiles("
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#include <sys/sysctl.h>
int main(void)
{
int name[2] = { CTL_HW, HW_PHYSMEM };
unsigned long mem;
size_t mem_ptr_size = sizeof(mem);
sysctl(name, 2, &mem, &mem_ptr_size, NULL, 0);
return 0;
}
"
TUKLIB_PHYSMEM_SYSCTL)
if(TUKLIB_PHYSMEM_SYSCTL)
if(HAVE_SYS_PARAM_H)
set(TUKLIB_PHYSMEM_DEFINITIONS
"HAVE_PARAM_H;TUKLIB_PHYSMEM_SYSCTL"
CACHE INTERNAL "")
else()
set(TUKLIB_PHYSMEM_DEFINITIONS
"TUKLIB_PHYSMEM_SYSCTL"
CACHE INTERNAL "")
endif()
return()
endif()
# HP-UX
check_c_source_compiles("
#include <sys/param.h>
#include <sys/pstat.h>
int main(void)
{
struct pst_static pst;
pstat_getstatic(&pst, sizeof(pst), 1, 0);
(void)pst.physical_memory;
(void)pst.page_size;
return 0;
}
"
TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
if(TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_PSTAT_GETSTATIC"
CACHE INTERNAL "")
return()
endif()
endfunction()
function(tuklib_physmem TARGET_OR_ALL)
CMake: Fix compatibility with CMake 3.13. The syntax "if(DEFINED CACHE{FOO})" requires CMake 3.14. In some other places the code treats the cache variables like normal variables already (${FOO} or if(FOO) is used, not ${CACHE{FOO}). Thanks to ygrek for reporting the bug on IRC.
2020-11-17 18:51:48 +00:00
if(NOT DEFINED TUKLIB_PHYSMEM_FOUND)
Build: Fix bugs in the CMake files. Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25 18:42:31 +00:00
message(STATUS "Checking how to detect the amount of physical memory")
tuklib_physmem_internal_check()
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 21:38:16 +00:00
CMake: Fix compatibility with CMake 3.13. The syntax "if(DEFINED CACHE{FOO})" requires CMake 3.14. In some other places the code treats the cache variables like normal variables already (${FOO} or if(FOO) is used, not ${CACHE{FOO}). Thanks to ygrek for reporting the bug on IRC.
2020-11-17 18:51:48 +00:00
if(DEFINED TUKLIB_PHYSMEM_DEFINITIONS)
Build: Fix bugs in the CMake files. Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25 18:42:31 +00:00
set(TUKLIB_PHYSMEM_FOUND 1 CACHE INTERNAL "")
else()
set(TUKLIB_PHYSMEM_FOUND 0 CACHE INTERNAL "")
message(WARNING
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 21:38:16 +00:00
"No method to detect the amount of physical memory was found")
Build: Fix bugs in the CMake files. Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25 18:42:31 +00:00
endif()
endif()
if(TUKLIB_PHYSMEM_FOUND)
tuklib_add_definitions("${TARGET_OR_ALL}"
"${TUKLIB_PHYSMEM_DEFINITIONS}")
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 21:38:16 +00:00
endif()
endfunction()