package/proj: add -lsdtc++ to Libs.Private

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/proj/0001-proj.pc.in-add-Libs.Private.patch

@@ -0,0 +1,27 @@
+From bdee73f3e0d8b4b6f2b6e0edb945dbd9abfd3255 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Wed, 9 Oct 2019 15:24:08 +0200
+Subject: [PATCH] proj.pc.in: add Libs.Private
+
+Add -lstdc++ to Libs.Private to allow packages such as libgeotiff to
+retrieve this dependency when linking statically with proj
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://github.com/OSGeo/PROJ/pull/1664]
+---
+ proj.pc.in | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/proj.pc.in b/proj.pc.in
+index a6a5d75f..001f08a1 100644
+--- a/proj.pc.in
++++ b/proj.pc.in
+@@ -9,4 +9,5 @@ Description: Cartographic Projections Library.
+ Requires:
+ Version: @VERSION@
+ Libs: -L${libdir} -lproj
++Libs.Private: -lstdc++
+ Cflags: -I${includedir}
+-- 
+2.23.0
+