Update the installation prefix in the pkgConfig file

ConfigurePkgConfig.pas

@@ -0,0 +1,43 @@
+var
+  AppPath: string;
+
+procedure ReplacePlaceholderInPkgConfig;
+var
+  PkgConfigFile: TStringList;
+  Index: Integer;
+  ModifiedAppPath: string;
+begin
+  // Read the contents of the liblite-string.pc file
+  PkgConfigFile := TStringList.Create;
+  try
+    PkgConfigFile.LoadFromFile(ExpandConstant('{app}\lib\pkgconfig\liblite-string.pc'));
+
+    // Modify the installation prefix to match the chosen installation destination
+    if PkgConfigFile.Count > 0 then
+    begin
+       // Replace backslashes with forward slashes
+       ModifiedAppPath := '';
+       for Index := 1 to Length(AppPath) do
+       begin
+         if AppPath[Index] = '\' then
+           ModifiedAppPath := ModifiedAppPath + '/'
+         else
+           ModifiedAppPath := ModifiedAppPath + AppPath[Index];
+       end;
+       // Update the prefix
+      PkgConfigFile[0] := 'prefix = "' + ModifiedAppPath + '"';
+    end;
+
+    // Write the modified contents back to the file
+    PkgConfigFile.SaveToFile(ExpandConstant('{app}\lib\pkgconfig\liblite-string.pc'));
+  finally
+    PkgConfigFile.Free;
+  end;
+end;
+
+// Run after the installation has completed
+procedure DeinitializeSetup();
+begin
+  AppPath := ExpandConstant('{app}');
+  ReplacePlaceholderInPkgConfig;
+end;

cmake/Packing.cmake

@@ -129,5 +129,6 @@ set(CPACK_INNOSETUP_SETUP_DisableWelcomePage OFF)
 set(CPACK_INNOSETUP_SETUP_AppCopyright "Copyright (C) 2024 Ian Duncan")
 set(CPACK_INNOSETUP_SETUP_AppComments "For more information, visit https://github.com/dr8co/LiteString")
 set(CPACK_INNOSETUP_SETUP_VersionInfoVersion "${CPACK_PACKAGE_VERSION}")
+set(CPACK_INNOSETUP_CODE_FILES "${CMAKE_CURRENT_SOURCE_DIR}/ConfigurePkgConfig.pas")
 
 include(CPack)