--- CMakeLists.txt.orig	2025-01-16 14:48:49.000000000 -0800
+++ CMakeLists.txt	2025-11-22 17:13:28.892206000 -0800
@@ -43,6 +43,7 @@
 option(ODE_WITH_TESTS "Builds the unit test application." ON)
 option(ODE_WIN32_LIB_OUTPUT_NAME_BASED_ON_FLOAT_SIZE "The output name of the library will be based on the size of float, on Windows." ON)
 option(ODE_WIN32_INSTALL_STATIC_LIBS_PDB "Install the PDB files for the static libraries (.lib) on Windows." OFF)
+option(ODE_DOUBLE_PRECISION "Use double-precision math." OFF)
 
 cmake_dependent_option(ODE_WITH_LIBCCD_BOX_CYL "Use libccd for box-cylinder." ON "ODE_WITH_LIBCCD" OFF)
 cmake_dependent_option(ODE_WITH_LIBCCD_CAP_CYL "Use libccd for capsule-cylinder." ON "ODE_WITH_LIBCCD" OFF)
@@ -54,12 +55,6 @@
 cmake_dependent_option(ODE_WITH_LIBCCD_CONVEX_SPHERE "Use libccd for convex-sphere." ON "ODE_WITH_LIBCCD" OFF)
 cmake_dependent_option(ODE_WITH_LIBCCD_SYSTEM "Use system libccd." OFF "ODE_WITH_LIBCCD" OFF)
 
-if(CMAKE_SIZEOF_VOID_P EQUAL 4)
-	option(ODE_DOUBLE_PRECISION "Use double-precision math." OFF)
-else()
-	option(ODE_DOUBLE_PRECISION "Use double-precision math." ON)
-endif()
-
 set(ODE_WIN32_STATIC_LIB_POSTFIX_DEBUG "sd" CACHE STRING "The postfix to use when building the library as a static .lib on Windows in DEBUG.")
 set(ODE_WIN32_STATIC_LIB_POSTFIX_MINSIZEREL "s" CACHE STRING "The postfix to use when building the library as a static .lib on Windows in MINSIZEREL.")
 set(ODE_WIN32_STATIC_LIB_POSTFIX_RELEASE "s" CACHE STRING "The postfix to use when building the library as a static .lib on Windows in RELEASE.")
@@ -757,12 +752,12 @@
 
 file(RELATIVE_PATH PACKAGE_RELATIVE_PATH "${CMAKE_INSTALL_FULL_LIBDIR}/pkgconfig" "${CMAKE_INSTALL_PREFIX}")
 string(REGEX REPLACE "/$" "" PACKAGE_RELATIVE_PATH "${PACKAGE_RELATIVE_PATH}")
-set(prefix "\${pcfiledir}/${PACKAGE_RELATIVE_PATH}")
+set(prefix "${CMAKE_INSTALL_PREFIX}")
 set(exec_prefix "\${prefix}")
 set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
 set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
 configure_file(ode.pc.in ode.pc @ONLY)
-set(prefix "\$(cd \"\$(dirname \"\$0\")\"; pwd -P)/..")
+set(prefix "${CMAKE_INSTALL_PREFIX}")
 configure_file(ode-config.in ode-config @ONLY)
 
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ode.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig COMPONENT development)