soapysdr: fix pkg-config paths

pkgs/applications/radio/soapysdr/default.nix

@@ -25,6 +25,11 @@ in stdenv.mkDerivation {
     sha256 = "19f2x0pkxvf9figa0pl6xqlcz8fblvqb19mcnj632p0l8vk6qdv2";
   };
 
+  patches = [
+    # see https://github.com/pothosware/SoapySDR/issues/352 for upstream issue
+    ./fix-pkgconfig.patch
+  ];
+
   nativeBuildInputs = [ cmake makeWrapper pkg-config ];
   buildInputs = [ libusb-compat-0_1 ncurses ]
     ++ lib.optionals usePython [ python swig2 ];

pkgs/applications/radio/soapysdr/fix-pkgconfig.patch

@@ -0,0 +1,14 @@
+diff --git a/lib/SoapySDR.in.pc b/lib/SoapySDR.in.pc
+index a1ca698..fd2f4c0 100644
+--- a/lib/SoapySDR.in.pc
++++ b/lib/SoapySDR.in.pc
+@@ -1,7 +1,5 @@
+-prefix=@CMAKE_INSTALL_PREFIX@
+-exec_prefix=${prefix}
+-libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@
+-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
++libdir=@CMAKE_INSTALL_FULL_LIBDIR@
++includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+ 
+ Name: Soapy SDR
+ Description: Vendor and platform neutral SDR interface library.