sci-physics/xfoil: fix bug 771615

Closes: https://bugs.gentoo.org/771615

Signed-off-by: Guilherme Amadio <amadio@gentoo.org>

sci-physics/xfoil/files/xfoil-6.99-ldflags.patch

@@ -0,0 +1,12 @@
+Fix bug #771615
+
+--- a/bin/Makefile	2024-04-11 08:00:24.832420892 +0200
++++ b/bin/Makefile	2024-04-11 07:59:56.052410291 +0200
+@@ -152,7 +152,7 @@
+ 	$(INSTALLCMD) pplot $(BINDIR)
+
+ blu: blu.o profil.o
+-	$(FC) -o blu blu.o profil.o
++	$(FC) -o blu blu.o profil.o $(FTNLIB)
+ 	$(INSTALLCMD) blu $(BINDIR)
+

sci-physics/xfoil/xfoil-6.99-r1.ebuild

@@ -20,7 +20,10 @@ IUSE="doc examples"
 RDEPEND="x11-libs/libX11"
 DEPEND="${RDEPEND}"
 
-PATCHES=( "${FILESDIR}"/${P}-overflow.patch )
+PATCHES=(
+	"${FILESDIR}"/${P}-overflow.patch
+	"${FILESDIR}"/${P}-ldflags.patch
+)
 
 src_prepare() {
 	# fix bug #147033