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-rw-r--r--HOWTO/INSTALL-CROSS.md5
-rw-r--r--erts/configure.in30
-rw-r--r--xcomp/erl-xcomp-vars.sh2
-rw-r--r--xcomp/erl-xcomp.conf.template6
4 files changed, 41 insertions, 2 deletions
diff --git a/HOWTO/INSTALL-CROSS.md b/HOWTO/INSTALL-CROSS.md
index a5cf775583..03ea4c6e76 100644
--- a/HOWTO/INSTALL-CROSS.md
+++ b/HOWTO/INSTALL-CROSS.md
@@ -515,6 +515,11 @@ When a variable has been set, no warning will be issued.
* `erl_xcomp_reliable_fpe` - `yes|no`. Defaults to `no`. If `yes`, the target
system must have reliable floating point exceptions.
+* `erl_xcomp_posix_memalign` - `yes|no`. Defaults to `yes` if `posix_memalign`
+ system call exists; otherwise `no`. If `yes`, the target system must have a
+ `posix_memalign` implementation that accepts larger than page size
+ alignment.
+
Copyright and License
---------------------
diff --git a/erts/configure.in b/erts/configure.in
index 886d82b109..14eae10841 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -1985,11 +1985,39 @@ 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)
diff --git a/xcomp/erl-xcomp-vars.sh b/xcomp/erl-xcomp-vars.sh
index eccdff47e3..337e0fb809 100644
--- a/xcomp/erl-xcomp-vars.sh
+++ b/xcomp/erl-xcomp-vars.sh
@@ -26,4 +26,4 @@
# and precious variables in $ERL_TOP/erts/aclocal.m4.
#
-erl_xcomp_vars="erl_xcomp_sysroot erl_xcomp_isysroot erl_xcomp_bigendian erl_xcomp_double_middle_endian erl_xcomp_linux_clock_gettime_correction erl_xcomp_linux_nptl erl_xcomp_linux_usable_sigusrx erl_xcomp_linux_usable_sigaltstack erl_xcomp_poll erl_xcomp_kqueue erl_xcomp_putenv_copy erl_xcomp_reliable_fpe erl_xcomp_getaddrinfo erl_xcomp_gethrvtime_procfs_ioctl erl_xcomp_clock_gettime_cpu_time erl_xcomp_after_morecore_hook erl_xcomp_dlsym_brk_wrappers"
+erl_xcomp_vars="erl_xcomp_sysroot erl_xcomp_isysroot erl_xcomp_bigendian erl_xcomp_double_middle_endian erl_xcomp_linux_clock_gettime_correction erl_xcomp_linux_nptl erl_xcomp_linux_usable_sigusrx erl_xcomp_linux_usable_sigaltstack erl_xcomp_poll erl_xcomp_kqueue erl_xcomp_putenv_copy erl_xcomp_reliable_fpe erl_xcomp_getaddrinfo erl_xcomp_gethrvtime_procfs_ioctl erl_xcomp_clock_gettime_cpu_time erl_xcomp_after_morecore_hook erl_xcomp_dlsym_brk_wrappers erl_xcomp_posix_memalign"
diff --git a/xcomp/erl-xcomp.conf.template b/xcomp/erl-xcomp.conf.template
index 7d70332cef..ad72b7d66b 100644
--- a/xcomp/erl-xcomp.conf.template
+++ b/xcomp/erl-xcomp.conf.template
@@ -264,4 +264,10 @@
# system must have reliable floating point exceptions.
#erl_xcomp_reliable_fpe=
+# * `erl_xcomp_posix_memalign' - `yes|no'. Defaults to `yes' if `posix_memalign'
+# system call exists; otherwise `no'. If `yes', the target system must have a
+# `posix_memalign' implementation that accepts larger than page size
+# alignment.
+#erl_xcomp_posix_memalign=
+
## -----------------------------------------------------------------------------