csound: fix build for musl

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

recipes-musicians/csound/csound_git.bb

@@ -34,6 +34,9 @@ SRC_URI = " \
     file://0006-fixed-unsafe-use-of-strncpy.patch \
     file://0007-util1-csd_util-cs.c-Fix-build-with-gcc8.patch \
     file://0008-Fix-build-with-fluidsynth-version-2.0.0.patch \
+    file://0009-Fix-build-for-linux-musl.patch \
+    file://0010-threadsafe.c-Fix-unused-valable-warning-error.patch \
+    file://0011-Use-POSIX-conform-location-for-errno.h.patch \
 "
 SRCREV = "2905724262b516983e779ed8c589602da4bf3f7d"
 S = "${WORKDIR}/git"

recipes-musicians/csound/files/0009-Fix-build-for-linux-musl.patch

@@ -0,0 +1,60 @@
+From cdcad764c01084d435c17e6a57450ca4a066705c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
+Date: Wed, 3 Apr 2019 20:50:18 +0200
+Subject: [PATCH] Fix build for linux/musl
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Musl (and myabe other libc libraries) does not have execinfo.h. So instead
+of assuming the header existant for all linux environments check for the file.
+
+Upstream-Status: Applied [1]
+
+[1] https://github.com/csound/csound/commit/7f93585037a41fbff22ce49d3bbde0d66eb7530b
+
+Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
+---
+ CMakeLists.txt | 5 ++++-
+ Top/csound.c   | 2 +-
+ 2 files changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index d5a8e1bed..90bca5950 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -603,7 +603,7 @@ set(HEADERS_TO_CHECK
+     unistd.h io.h fcntl.h stdint.h
+     sys/time.h sys/types.h termios.h
+     values.h winsock.h sys/socket.h
+-    dirent.h inttypes.h)
++    dirent.h inttypes.h execinfo.h)
+ 
+ foreach(header ${HEADERS_TO_CHECK})
+     # Convert to uppercase and replace [./] with _
+@@ -617,6 +617,9 @@ if (NOT HAVE_INTTYPES_H)
+     message(FATAL_ERROR "Csound requires inttypes.h")
+ endif()
+ 
++if (HAVE_EXECINFO_H)
++    add_definitions("-DHAVE_EXECINFO")
++endif()
+ 
+ check_deps(USE_LRINT HAVE_LRINT)
+ if(USE_LRINT)
+diff --git a/Top/csound.c b/Top/csound.c
+index 9b95674df..48a53717a 100644
+--- a/Top/csound.c
++++ b/Top/csound.c
+@@ -1157,7 +1157,7 @@ static void psignal_(int sig, char *str)
+ 
+ static void signal_handler(int sig)
+ {
+-#if defined(LINUX) && !defined(ANDROID) && !defined(NACL)
++#if defined(HAVE_EXECINFO) && !defined(ANDROID) && !defined(NACL)
+     #include <execinfo.h>
+ 
+     {
+-- 
+2.20.1
+

recipes-musicians/csound/files/0010-threadsafe.c-Fix-unused-valable-warning-error.patch

@@ -0,0 +1,43 @@
+From d91048c4943e81dafcdb2db701fe04c0a9d6e0b1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
+Date: Wed, 3 Apr 2019 21:01:24 +0200
+Subject: [PATCH] threadsafe.c: Fix unused valable warning/error
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+| Top/threadsafe.c:537:5: error: variable 'x' set but not used [-Werror=unused-but-set-variable]
+|    } x;
+|      ^
+| cc1: all warnings being treated as errors
+
+Upstream-Status: Applied [1]
+
+[1] https://github.com/csound/csound/commit/0c7fee69278933a3eb108d17a641ab4ecabde7c6
+
+Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
+---
+ Top/threadsafe.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/Top/threadsafe.c b/Top/threadsafe.c
+index 3a7278459..6214a1b5e 100644
+--- a/Top/threadsafe.c
++++ b/Top/threadsafe.c
+@@ -531,11 +531,13 @@ MYFLT csoundGetControlChannel(CSOUND *csound, const char *name, int *err)
+ 
+ void csoundSetControlChannel(CSOUND *csound, const char *name, MYFLT val){
+   MYFLT *pval;
++#if defined(MSVC) || defined(HAVE_ATOMIC_BUILTIN)
+   union {
+     MYFLT d;
+     MYFLT_INT_TYPE i;
+   } x;
+   x.d = val;
++#endif
+   if (csoundGetChannelPtr(csound, &pval, name,
+                           CSOUND_CONTROL_CHANNEL | CSOUND_INPUT_CHANNEL)
+       == CSOUND_SUCCESS)
+-- 
+2.20.1
+

recipes-musicians/csound/files/0011-Use-POSIX-conform-location-for-errno.h.patch

@@ -0,0 +1,46 @@
+From 6d86d9c96c01eb74591c83e3f09bfaf46bca445f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
+Date: Wed, 3 Apr 2019 21:17:30 +0200
+Subject: [PATCH] Use POSIX conform location for errno.h
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+On its POSIX-correctness crusade musl spits out a warning which ends as error:
+
+| In file included from /home/superandy/tmp/oe-core-musl/work/cortexa7t2hf-neon-vfpv4-mortsgna-linux-musleabi/csound/6.12-r0/git/Opcodes/linuxjoystick.c:39:
+| /home/superandy/tmp/oe-core-musl/work/cortexa7t2hf-neon-vfpv4-mortsgna-linux-musleabi/csound/6.12-r0/recipe-sysroot/usr/include/sys/errno.h:1:2: error: #warning redirecting incorrect #include <sys/errno.h> to <errno.h> [-Werror=cpp]
+|  #warning redirecting incorrect #include <sys/errno.h> to <errno.h>
+|   ^~~~~~~
+| cc1: all warnings being treated as errors
+
+Yes that is 'correct' [1] as musl claims itself [2] but...
+
+[1] http://pubs.opengroup.org/onlinepubs/000095399/basedefs/errno.h.html
+[2] https://www.musl-libc.org/
+
+Upstream-Status: Applied [3]
+
+[3] https://github.com/csound/csound/commit/38da4f1c1d93377d3ff90e15be8998f9408faf34
+
+Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
+---
+ Opcodes/linuxjoystick.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Opcodes/linuxjoystick.c b/Opcodes/linuxjoystick.c
+index 348f49168..a56ad18e3 100644
+--- a/Opcodes/linuxjoystick.c
++++ b/Opcodes/linuxjoystick.c
+@@ -36,7 +36,7 @@
+ */
+ 
+ #include "linuxjoystick.h"
+-#include <sys/errno.h>
++#include <errno.h>
+ 
+ static int32_t linuxjoystick (CSOUND *csound, LINUXJOYSTICK *stick)
+ {
+-- 
+2.20.1
+