acpica: fix compilation with musl

Manipulating stderr after freopen() fails as done by upstream
does not work with musl. The replacement is Unix specific
and uses open()/dup2().

(From OE-Core rev: d656298e1438c9c5a2979a1c76f5cdb804a267fb)

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/acpica/acpica_20150515.bb

@@ -19,6 +19,7 @@ DEPENDS = "bison flex"
 SRC_URI = "https://acpica.org/sites/acpica/files/acpica-unix2-${PV}.tar.gz \
     file://no-werror.patch \
     file://rename-yy_scan_string-manually.patch \
+    file://manipulate-fds-instead-of-FILE.patch \
     "
 SRC_URI[md5sum] = "2bc4a7ccc82de9df9fa964f784ecb29c"
 SRC_URI[sha256sum] = "61204ec56d71bc9bfa2ee2ade4c66f7e8541772ac72ef8ccc20b3f339cc96374"

meta/recipes-extended/acpica/files/manipulate-fds-instead-of-FILE.patch

@@ -0,0 +1,71 @@
+From 33a57979738e5ab13950ec1c0e7298e41ef50929 Mon Sep 17 00:00:00 2001
+From: Patrick Ohly <patrick.ohly@intel.com>
+Date: Thu, 23 Feb 2017 18:10:47 +0100
+Subject: [PATCH] aslfiles.c: manipulate fds instead of FILE
+
+Copying what stdout/stderr point to is not portable and fails with
+musl because FILE is an undefined struct.
+
+Instead, use lower-level Unix functions to modify the file that stderr
+writes into. This works on the platforms that Yocto targets.
+
+Upstream-Status: Inappropriate [embedded specific]
+
+Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
+---
+ source/compiler/aslfiles.c | 20 +++++++++++---------
+ 1 file changed, 11 insertions(+), 9 deletions(-)
+
+diff --git a/source/compiler/aslfiles.c b/source/compiler/aslfiles.c
+index 947e465..7a352b4 100644
+--- a/source/compiler/aslfiles.c
++++ b/source/compiler/aslfiles.c
+@@ -44,6 +44,11 @@
+ #include "aslcompiler.h"
+ #include "acapps.h"
+ 
++#include <sys/types.h>
++#include <sys/stat.h>
++#include <fcntl.h>
++#include <unistd.h>
++
+ #define _COMPONENT          ACPI_COMPILER
+         ACPI_MODULE_NAME    ("aslfiles")
+ 
+@@ -569,6 +574,8 @@ FlOpenMiscOutputFiles (
+ 
+     if (Gbl_DebugFlag)
+     {
++        int fd;
++
+         Filename = FlGenerateFilename (FilenamePrefix, FILE_SUFFIX_DEBUG);
+         if (!Filename)
+         {
+@@ -582,20 +589,15 @@ FlOpenMiscOutputFiles (
+         /* TBD: hide this behind a FlReopenFile function */
+ 
+         Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Filename = Filename;
+-        Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Handle =
+-            freopen (Filename, "w+t", stderr);
+-
+-        if (!Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Handle)
++        fd = open(Filename, O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
++        if (fd < 0 ||
++            dup2(fd, fileno(stderr)))
+         {
+-            /*
+-             * A problem with freopen is that on error,
+-             * we no longer have stderr.
+-             */
+             Gbl_DebugFlag = FALSE;
+-            memcpy (stderr, stdout, sizeof (FILE));
+             FlFileError (ASL_FILE_DEBUG_OUTPUT, ASL_MSG_DEBUG_FILENAME);
+             AslAbort ();
+         }
++        Gbl_Files[ASL_FILE_DEBUG_OUTPUT].Handle = stderr;
+ 
+         AslCompilerSignon (ASL_FILE_DEBUG_OUTPUT);
+         AslCompilerFileHeader (ASL_FILE_DEBUG_OUTPUT);
+-- 
+2.1.4
+