Use dynamic linking instead of hardcoded rpath. 
lib/init/grass.py: Use LD_RUN_PATH instead of DYLD_LIBRARY_PATH to pass lib path to ctypesgen

--- configure.orig	2026-05-08 12:38:23
+++ configure	2026-05-09 18:53:29
@@ -5255,10 +5255,10 @@
         *-apple-darwin*)
             SHLIB_CFLAGS="-fno-common"
             SHLIB_SUFFIX=".dylib"
-            SHLIB_LD="${CC} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name @rpath/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
-            SHLIB_LDX="${CXX} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name @rpath/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
+            SHLIB_LD="${CC} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name \${INST_DIR}/lib/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
+            SHLIB_LDX="${CXX} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name \${INST_DIR}/lib/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
             LDFLAGS="-Wl,-rpath,${INSTDIR}/lib,-rpath,\${GISBASE}/lib"
-            LD_LIBRARY_PATH_VAR="LD_RUN_PATH"
+            LD_LIBRARY_PATH_VAR="DYLD_LIBRARY_PATH"
             ;;
 	*-sun-solaris*)
 	    # Note: If _REENTRANT isn't defined, then Solaris
--- aclocal.m4.orig	2026-05-08 12:38:23
+++ aclocal.m4	2026-05-09 18:54:34
@@ -512,10 +512,10 @@
         *-apple-darwin*)
             SHLIB_CFLAGS="-fno-common"
             SHLIB_SUFFIX=".dylib"
-            SHLIB_LD="${CC} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name @rpath/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
-            SHLIB_LDX="${CXX} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name @rpath/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
+            SHLIB_LD="${CC} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name \${INST_DIR}/lib/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
+            SHLIB_LDX="${CXX} -dynamiclib -compatibility_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -current_version \${GRASS_VERSION_MAJOR}.\${GRASS_VERSION_MINOR} -install_name \${INST_DIR}/lib/lib\${LIB_NAME}\${SHLIB_SUFFIX}"
             LDFLAGS="-Wl,-rpath,${INSTDIR}/lib,-rpath,\${GISBASE}/lib"
-            LD_LIBRARY_PATH_VAR="LD_RUN_PATH"
+            LD_LIBRARY_PATH_VAR="DYLD_LIBRARY_PATH"
             ;;
 	*-sun-solaris*)
 	    # Note: If _REENTRANT isn't defined, then Solaris