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authorLukas Larsson <[email protected]>2013-10-28 18:26:40 +0100
committerLukas Larsson <[email protected]>2013-11-01 10:39:29 +0100
commit70ebf76f1cef4a6de6be3ea96b36fb81fe245921 (patch)
treecd8ae5d1663cdd40acec0a05cf4ad1d08f05351c /erts
parent207a13a549052e014a82362032995e347ffb68ff (diff)
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erts: Add max alignment posix_memalign configure check
On some OSs posix_memalign exists, but it does not allow for alignment greater than the current page size. So we have to do a runtime check for alignment size and also add cross compile options.
Diffstat (limited to 'erts')
-rw-r--r--erts/configure.in30
1 files changed, 29 insertions, 1 deletions
diff --git a/erts/configure.in b/erts/configure.in
index f17f4cb5c8..8288a1aab1 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -1974,11 +1974,39 @@ AC_CHECK_FUNCS([getipnodebyname getipnodebyaddr gethostbyname2])
AC_CHECK_FUNCS([ieee_handler fpsetmask finite isnan isinf res_gethostbyname dlopen \
pread pwrite memmove strerror strerror_r strncasecmp \
- gethrtime localtime_r gmtime_r inet_pton posix_memalign \
+ gethrtime localtime_r gmtime_r inet_pton \
mmap mremap memcpy mallopt sbrk _sbrk __sbrk brk _brk __brk \
flockfile fstat strlcpy strlcat setsid posix2time time2posix \
setlocale nl_langinfo poll])
+
+case X$erl_xcomp_posix_memalign in
+ Xno) ;;
+ Xyes) AC_DEFINE(HAVE_POSIX_MEMALIGN,[1],
+ [Define to 1 if you have the `posix_memalign' function.]) ;;
+ *)
+ AC_CHECK_FUNC(
+ [posix_memalign],
+ [if test "$cross_compiling" != yes; then
+AC_TRY_RUN([
+#include <stdlib.h>
+int main(void) {
+ void *ptr = NULL;
+ int error;
+ size_t alignment = 0x40000, size = 0x20028;
+ if ((error = posix_memalign(&ptr, alignment, size)) != 0 || ptr == NULL)
+ return error;
+ return 0;
+}
+],AC_DEFINE(HAVE_POSIX_MEMALIGN,[1],
+ [Define to 1 if you have the `posix_memalign' function.])
+)
+ else
+ AC_DEFINE(HAVE_POSIX_MEMALIGN,[1],
+ [Define to 1 if you have the `posix_memalign' function.])
+ fi]);;
+esac
+
dnl writev on OS X snow leopard is broken for files > 4GB
case $host_os in
darwin10.8.0)