From d8535473c787386e5a341632ea758013a61b247c Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Thu, 14 Nov 2019 15:45:46 +0000
Subject: Fix build on BSD systems

I tested FreeBSD, DragonflyBSD, NetBSD and OpenBSD and the endian
macros weren't necessary (and in fact caused errors) on all of them.

Because OpenBSD ships with an ancient GCC that doesn't support the
checked addition/multiplication builtins, the build there would fail
unless built with CC=cc or CC=clang.  I changed configure.ac to prefer
cc over gcc, so that the distribution's compiler preference is
respected.  (The default is [gcc cc]).  I had to move AC_PROG_CC above
LT_INIT because otherwise LT_INIT would run AC_PROG_CC first, and we
wouldn't have a chance to use non-default parameters.
---
 configure.ac          |  2 +-
 include/util/compat.h | 13 +++++--------
 lib/common/dirstack.c |  1 +
 lib/common/mkdir_p.c  |  2 +-
 4 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/configure.ac b/configure.ac
index cb11161..cc1ce9f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,8 +3,8 @@ AC_INIT([squashfs-tools-ng], [0.7], [goliath@infraroot.at], squashfs-tools-ng)
 AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE([foreign dist-xz subdir-objects])
 AM_SILENT_RULES([yes])
+AC_PROG_CC([cc gcc clang])
 LT_INIT([win32-dll])
-AC_PROG_CC
 AC_PROG_CC_C99
 AC_PROG_INSTALL
 AC_SYS_LARGEFILE
diff --git a/include/util/compat.h b/include/util/compat.h
index a1a45b6..cb9e81c 100644
--- a/include/util/compat.h
+++ b/include/util/compat.h
@@ -7,6 +7,10 @@
 #ifndef COMPAT_H
 #define COMPAT_H
 
+#ifndef __linux__
+#define O_PATH 0
+#endif
+
 #if defined(__APPLE__)
 #include <libkern/OSByteOrder.h>
 
@@ -17,14 +21,8 @@
 #define le32toh(x) OSSwapLittleToHostInt32(x)
 #define le16toh(x) OSSwapLittleToHostInt16(x)
 #define le64toh(x) OSSwapLittleToHostInt64(x)
-#elif defined(__OpenBSD__)
+#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
 #include <sys/endian.h>
-#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
-#include <sys/endian.h>
-
-#define le16toh(x) letoh16(x)
-#define le32toh(x) letoh32(x)
-#define le64toh(x) letoh64(x)
 #elif defined(_WIN32) || defined(__WINDOWS__)
 #define htole16(x) (x)
 #define htole32(x) (x)
@@ -107,7 +105,6 @@ struct stat {
 #else
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <sys/sysmacros.h>
 #endif
 
 #ifndef HAVE_GETLINE
diff --git a/lib/common/dirstack.c b/lib/common/dirstack.c
index 8f73898..f8d1278 100644
--- a/lib/common/dirstack.c
+++ b/lib/common/dirstack.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
  */
 #include "common.h"
+#include "util/compat.h"
 
 #include <string.h>
 #include <stdlib.h>
diff --git a/lib/common/mkdir_p.c b/lib/common/mkdir_p.c
index cb433b3..95187ba 100644
--- a/lib/common/mkdir_p.c
+++ b/lib/common/mkdir_p.c
@@ -7,7 +7,7 @@
 #include "common.h"
 
 #include <string.h>
-#include <alloca.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <errno.h>
 
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