libCello: unbreak musl

srcpkgs/libCello/template

@@ -1,7 +1,7 @@
 # Template file for 'libcello'
 pkgname=libCello
 version=1.1.7
-revision=2
+revision=3
 short_desc="Higher level programming in C"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="http://www.libcello.org/"
@@ -9,6 +9,11 @@ license="BSD"
 distfiles="http://$pkgname.org/static/$pkgname-$version.tar.gz"
 checksum=2273fe8257109c2dd19054beecd83ddcc780ec565a1ad02721e24efa74082908
 
+post_configure() {
+	# There is no include <execinfo.h> in musl libc
+	sed -e "s;defined(__unix__);(defined(__unix__) \&\& defined(__GLIBC__));" \
+		-i src/Exception.c
+}
 do_build() {
 	sed -i 's,CFLAGS =,CFLAGS +=,' Makefile
 	make CC=$CC ${makejobs}