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Diffstat (limited to '')
| -rw-r--r-- | cmake/tuklib_physmem.cmake | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/cmake/tuklib_physmem.cmake b/cmake/tuklib_physmem.cmake new file mode 100644 index 0000000..f5ed888 --- /dev/null +++ b/cmake/tuklib_physmem.cmake @@ -0,0 +1,150 @@ +# +# 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 +# +# This file has been put into the public domain. +# You can do whatever you want with this file. +# + +include("${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake") +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) + if(NOT DEFINED TUKLIB_PHYSMEM_FOUND) + message(STATUS "Checking how to detect the amount of physical memory") + tuklib_physmem_internal_check() + + if(DEFINED TUKLIB_PHYSMEM_DEFINITIONS) + set(TUKLIB_PHYSMEM_FOUND 1 CACHE INTERNAL "") + else() + set(TUKLIB_PHYSMEM_FOUND 0 CACHE INTERNAL "") + message(WARNING + "No method to detect the amount of physical memory was found") + endif() + endif() + + if(TUKLIB_PHYSMEM_FOUND) + tuklib_add_definitions("${TARGET_OR_ALL}" + "${TUKLIB_PHYSMEM_DEFINITIONS}") + endif() +endfunction() |