autoconf: Check for posix_memalign
Rather than just defining HAVE_POSIX_MEMALIGN on Linux, check whether
the function exists on all platforms and define the macro if it is.
diff --git a/configure.ac b/configure.ac
index c4b65db..e44f619 100644
--- a/configure.ac
+++ b/configure.ac
@@ -85,7 +85,7 @@
if test "x$GCC" = xyes; then
DEFINES="$DEFINES -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_BSD_SOURCE"
fi
- DEFINES="$DEFINES -D_SVID_SOURCE -D_GNU_SOURCE -DPTHREADS -DHAVE_POSIX_MEMALIGN"
+ DEFINES="$DEFINES -D_SVID_SOURCE -D_GNU_SOURCE -DPTHREADS"
;;
solaris*)
DEFINES="$DEFINES -DPTHREADS -DSVR4"
@@ -325,6 +325,9 @@
AC_CHECK_FUNC([dlopen], [],
[AC_CHECK_LIB([dl], [dlopen], [DLOPEN_LIBS="-ldl"])])
+dnl See if posix_memalign is available
+AC_CHECK_FUNC([posix_memalign], [DEFINES="$DEFINES -DHAVE_POSIX_MEMALIGN"])
+
dnl SELinux awareness.
AC_ARG_ENABLE([selinux],
[AS_HELP_STRING([--enable-selinux],