diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 82be9254..8f26cabd 100644 --- a/configure.ac +++ b/configure.ac @@ -328,6 +328,31 @@ AC_SEARCH_LIBS(inet_ntoa, nsl) AC_SEARCH_LIBS(socket, socket) AC_CHECK_LIB(xnet, socket) +# Check if using glibc and have malloc_trim(3). The glibc free(3) is pretty bad +# about returning memory to the kernel unless the application tells it when to +# with malloc_trim(3). +AC_MSG_CHECKING(if free doesn't work very well) +AC_LINK_IFELSE([AC_LANG_SOURCE( + [ + #include <stdlib.h> + #ifdef __GLIBC__ + #include <malloc.h> + int main(void) { + malloc_trim (0); + exit(0); + } + #else + no + #endif + ])], + found_malloc_trim=yes, + found_malloc_trim=no +) +AC_MSG_RESULT($found_malloc_trim) +if test "x$found_malloc_trim" = xyes; then + AC_DEFINE(HAVE_MALLOC_TRIM) +fi + # Check for CMSG_DATA. On some platforms like HP-UX this requires UNIX 95 # (_XOPEN_SOURCE and _XOPEN_SOURCE_EXTENDED) (see xopen_networking(7)). On # others, UNIX 03 (_XOPEN_SOURCE 600, see standards(7) on Solaris). |