diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/configure.ac b/configure.ac index e3fd728..1bd446d 100644 --- a/configure.ac +++ b/configure.ac @@ -172,15 +172,35 @@ case $host in ;; esac -# Check for optional glibc features. -# Will probably only be found on Linux/glibc. -AC_CHECK_HEADERS([malloc.h]) -AC_CHECK_FUNCS([malloc_trim mallinfo]) - -# jemalloc-specific functions. -# Will probably only be foudn on FreeBSD. -AC_CHECK_HEADERS([malloc_np.h]) -AC_CHECK_FUNCS([mallctlnametomib mallctlbymib]) +# Check for optional libc features. +# Some of this will only be found on glibc, +# others on FreeBSD/jemalloc. +AC_CHECK_HEADERS([malloc.h malloc_np.h]) +AC_CHECK_FUNCS([malloc_trim malloc_usable_size]) + +# Check whether compiler supports global sized deallocations. +# If yes, this will improve the memory limiting fallback +# implementation. +# Once we can depend on C++14, this check is no longer necessary. +AC_CACHE_CHECK([if C++ compiler supports -fsized-deallocation], + [sciteco_cv_sized_deallocation_result], [ + AC_LANG_PUSH(C++) + OLD_CXXFLAGS="$CXXFLAGS" + CXXFLAGS="$CXXFLAGS -fsized-deallocation" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM( + [[#include <new>]], + [[(::operator delete)(0, 256)]] + )], sciteco_cv_sized_deallocation_result=yes, + sciteco_cv_sized_deallocation_result=no) + CXXFLAGS="$OLD_CXXFLAGS" + AC_LANG_POP(C++) +]) +if [[ x$sciteco_cv_sized_deallocation_result = xyes ]]; then + AC_DEFINE(HAVE_SIZED_DEALLOCATION, 1, + [C++ compiler supports -fsized-deallocation]) +fi +AM_CONDITIONAL(HAVE_SIZED_DEALLOCATION, + test "$sciteco_cv_sized_deallocation_result" = yes) # # Config options |