gatling: needs -fcommon for gcc10

[ci skip]

srcpkgs/gatling/template

@@ -12,7 +12,14 @@ distfiles="https://www.fefe.de/gatling/$pkgname-$version.tar.xz"
 checksum=6fa329d0ced0c80deb8dde5460e9d9e984bee94f265043d7fdec0e253dce9aa4
 make_build_target="gatling dl getlinks"
 make_install_args="prefix=/usr MANDIR=/usr/share/man"
-CFLAGS+=" -std=c99 -I${XBPS_CROSS_BASE}/usr/include/libowfat"
+
+CFLAGS="-std=c99 -I${XBPS_CROSS_BASE}/usr/include/libowfat -fcommon"
+
+pre_build() {
+	vsed -i GNUmakefile \
+		-e "s;^CFLAGS=.*;CFLAGS=${CFLAGS};" \
+		-e "s;\$(CC) \$(LDFLAGS);\$(CC) \$(CFLAGS) \$(LDFLAGS);"
+}
 
 pre_install() {
 	vmkdir usr/share/man/man1