swi-prolog: fix for musl, respect CFLAGS.

srcpkgs/swi-prolog/template

@@ -1,10 +1,9 @@
 # Template file for 'swi-prolog'
 pkgname=swi-prolog
 version=6.6.6
-revision=4
+revision=5
 wrksrc="pl-${version}"
 build_style=gnu-configure
-configure_args="--with-world"
 hostmakedepends="pkg-config"
 makedepends="gmp-devel readline-devel libressl-devel zlib-devel libarchive-devel libXft-devel libjpeg-turbo-devel libXpm-devel libXinerama-devel unixodbc-devel  libXt-devel"
 short_desc="A comprehensive free Prolog environment"
@@ -15,6 +14,15 @@ distfiles="http://www.swi-prolog.org/download/stable/src/pl-${version}.tar.gz"
 checksum=9f80bb274e2f31fd68b0acbe35982c012d5f8311dbe44ec1d8d04351a776996d
 nocross=yes
 
+post_extract() {
+	case "$XBPS_TARGET_MACHINE" in
+		*-musl) sed -i 's/unsigned int line/int line/' src/pl-thread.c
+	esac
+}
+do_configure() {
+	COFLAGS="${CFLAGS}" ./configure ${configure_args} \
+		--with-world --enable-custom-flags
+}
 post_install() {
 	chmod +x "${DESTDIR}/usr/lib/swipl-${version}/library/dialect/sicstus/swipl-lfr.pl"
 }