Initial code.

configure.ac

Index: configure.ac
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000000000000000000000000000000000000..29de28cde5c785b2585bdc2812c239a4a94565da
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,66 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+m4_pattern_allow([AM_INIT_AUTOMAKE])
+m4_pattern_allow([AC_PROG_LIBTOOL])
+
+AC_PREREQ([2.63])
+AC_INIT([libscrypt], [1.1.6], [http://www.tarsnap.com/scrypt.html])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_SRCDIR([src/scrypt_platform.h])
+AC_CONFIG_HEADERS([config.h])
+AM_INIT_AUTOMAKE([foreign])
+
+AC_PROG_LIBTOOL
+AC_SUBST(enable_shared)
+AC_SUBST(enable_static)
+libtool_VERSION=1:0:0
+AC_SUBST(libtool_VERSION)
+
+# Checks for programs.
+AC_PROG_CC
+
+# Checks for libraries.
+AC_CHECK_LIB(rt, clock_gettime)
+
+# Checks for header files.
+AC_CHECK_HEADERS([err.h fcntl.h inttypes.h memory.h stddef.h stdint.h stdlib.h string.h strings.h sys/endian.h sys/param.h sys/stat.h sys/sysinfo.h sys/time.h sys/types.h termios.h unistd.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_C_INLINE
+AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_TYPE_UINT8_T
+AC_CHECK_TYPES([struct sysinfo],[], [], [[#include <sys/sysinfo.h>]])
+AC_CHECK_HEADER([sys/sysinfo.h], [
+                 AC_CHECK_MEMBER(struct sysinfo.mem_unit,
+                                 [AC_DEFINE([HAVE_STRUCT_SYSINFO_MEM_UNIT],[],[sys/sysinfo.mem_unit])],
+                                 [],
+                                 [#include <sys/sysinfo.h>])])
+AC_CHECK_HEADER([sys/sysinfo.h], [
+                 AC_CHECK_MEMBER(struct sysinfo.totalram,
+                                 [AC_DEFINE([HAVE_STRUCT_SYSINFO_TOTALRAM],[],[sys/sysinfo.totalram])],
+                                 [],
+                                 [#include <sys/sysinfo.h>])])
+
+# Checks for library functions.
+AC_FUNC_MALLOC
+AC_FUNC_MMAP
+AC_FUNC_STRTOD
+AC_CHECK_FUNCS([clock_gettime gettimeofday memmove memset munmap posix_memalign strcspn strdup strerror strtoumax sysinfo])
+
+AC_CHECK_DECLS(be64enc)
+
+# Check if we have a hw.usermem sysctl.
+if sysctl hw.usermem >/dev/null 2>/dev/null; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_SYSCTL_HW_USERMEM 1
+_ACEOF
+
+fi
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT