haproxy: fix musl build

srcpkgs/haproxy/template

@@ -1,7 +1,7 @@
 # Template file for 'haproxy'
 pkgname=haproxy
 version=2.1.5
-revision=1
+revision=2
 build_style=gnu-makefile
 make_build_args="TARGET=linux-glibc USE_PCRE=1 USE_PCRE_JIT=1 USE_ZLIB=1
  USE_OPENSSL=1 USE_LIBCRYPT=1 USE_GETADDRINFO=1 USE_LUA=1"
@@ -19,12 +19,16 @@ make_dirs="$haproxy_homedir 0750 ${pkgname} ${pkgname}"
 conf_files="/etc/${pkgname}/${pkgname}.cfg"
 system_accounts="$pkgname"
 
-case "$XBPS_TARGET_MACHINE" in
-	*-musl) CFLAGS="-D__LINUX_NETFILTER_H";;
+case "$XBPS_TARGET_LIBC" in
+	musl)
+		makedepends+=" libexecinfo-devel"
+		CFLAGS="-D__LINUX_NETFILTER_H"
+		ADDLIB+=" -lexecinfo"
+	;;
 esac
 
 if [ "$XBPS_TARGET_NO_ATOMIC8" ]; then
-	ADDLIB="-latomic"
+	ADDLIB+=" -latomic"
 fi
 
 do_build() {