fix(cpp_args): properly propegate args

previously Cpp args were set with add_project_argument, which does not work from subprojects. Changed this so args can be set from calling projects

build-extra/log-level/meson.build

@@ -29,4 +29,4 @@ elif (llevel == 'critical')
 endif
 
 log_argument = '-DQUILL_COMPILE_ACTIVE_LOG_LEVEL=' + log_argument
-add_project_arguments(log_argument, language: 'cpp')
+gridfire_args += [log_argument]

build-extra/pkg-config/meson.build

@@ -9,7 +9,11 @@ if get_option('pkg_config')
             libgridfire,
             libcomposition,
             libconst,
-            liblogging
+            liblogging,
+            libcppad_static,
+            libcvode_static,
+            libkinsol_static
+            
         ],
         subdirs: ['gridfire'],
         filebase: 'gridfire',