csound: fix musl

srcpkgs/csound/patches/0001-Allow-to-link-against-libexecinfo-on-linux-systems.patch

@@ -0,0 +1,32 @@
+From d122dd83cba94a9b8857564816ab48556b609180 Mon Sep 17 00:00:00 2001
+From: John Zimmermann <johnz@posteo.net>
+Date: Sun, 3 Feb 2019 03:04:05 +0100
+Subject: [PATCH] Allow to link against libexecinfo on linux systems
+
+Some C-libraries like the Musl libc don't provide execinfo themself so
+it is required to use a third party library to use execinfo there.
+---
+ CMakeLists.txt | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git CMakeLists.txt CMakeLists.txt
+index c6cd95a02..2fb129d5f 100644
+--- CMakeLists.txt
++++ CMakeLists.txt
+@@ -1284,6 +1284,13 @@ if(LINUX)
+       list(APPEND libcsound_LIBS ${LIBRT_LIBRARY})
+       message(STATUS "  ADDING LIBRT LIBRARY: ${LIBRT_LIBRARY}.")
+     endif()
++
++    find_library(LIBEXECINFO_LIBRARY execinfo)
++
++    if(LIBEXECINFO_LIBRARY)
++       list(APPEND libcsound_LIBS ${LIBEXECINFO_LIBRARY})
++       message(STATUS "  ADDING LIBEXECINFO LIBRARY: ${LIBEXECINFO_LIBRARY}.")
++    endif()
+ endif()
+ 
+ if(APPLE AND NOT IOS)
+-- 
+2.20.1
+

srcpkgs/csound/template

@@ -22,8 +22,8 @@ nocross=yes
 
 CXXFLAGS="-Wno-error"
 
-case "$XBPS_TARGET_MACHINE" in
-	*-musl) broken="not yet supported";;
+case $XBPS_TARGET_MACHINE in
+	*-musl) makedepends+=" libexecinfo-devel";;
 esac
 
 post_install() {