cmake: Fix build against pcsc-lite >= 2.2

The pcsc-lite 2.2.0 switched from autotools to meson and reworked the
pkgconfig files. The new pkg config provides CFLAGS that work ok, but
the yubihsm-shell ignores them and hopes that all included files are in
the default include directory (with the PCSC prefix).

Note, the value ${LIBPCSC_CFLAGS} is not in quotes because it is a
semicolon separated list which we need to split to separate items here.

This solution works with both old and new versions.

Fixes: Yubico#404

Signed-off-by: Jakub Jelen <[email protected]>

CMakeLists.txt

@@ -194,6 +194,7 @@ if(NOT BUILD_ONLY_LIB)
 
   if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
     pkg_search_module (LIBPCSC REQUIRED libpcsclite)
+    string (APPEND CMAKE_C_FLAGS ${LIBPCSC_CFLAGS})
   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
     set (LIBPCSC_LDFLAGS "winscard.lib")
   elseif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")