diff --git a/toolchain/.gitignore b/toolchain/.gitignore
index 355164c1..51b4cfda 100644
--- a/toolchain/.gitignore
+++ b/toolchain/.gitignore
@@ -1 +1 @@
-*/
+local/
diff --git a/toolchain/build.sh b/toolchain/build.sh
index 29e9cf42..8d227e15 100755
--- a/toolchain/build.sh
+++ b/toolchain/build.sh
@@ -193,6 +193,8 @@ build_cmake() {
 
 	cp -r ./bin/* $BANAN_TOOLCHAIN_PREFIX/bin/
 	cp -r ./share/* $BANAN_TOOLCHAIN_PREFIX/share/
+
+	cp $BANAN_TOOLCHAIN_DIR/cmake-platform/* $BANAN_TOOLCHAIN_PREFIX/share/cmake-3.26/Modules/Platform/
 }
 
 BUILD_BINUTILS=1
diff --git a/toolchain/cmake-platform/banan-os-GNU-ASM.cmake b/toolchain/cmake-platform/banan-os-GNU-ASM.cmake
new file mode 100644
index 00000000..c2964019
--- /dev/null
+++ b/toolchain/cmake-platform/banan-os-GNU-ASM.cmake
@@ -0,0 +1,2 @@
+include(Platform/banan-os-GNU)
+__banan_os_compiler_gnu(ASM)
diff --git a/toolchain/cmake-platform/banan-os-GNU-C.cmake b/toolchain/cmake-platform/banan-os-GNU-C.cmake
new file mode 100644
index 00000000..455580dc
--- /dev/null
+++ b/toolchain/cmake-platform/banan-os-GNU-C.cmake
@@ -0,0 +1,2 @@
+include(Platform/banan-os-GNU)
+__banan_os_compiler_gnu(C)
diff --git a/toolchain/cmake-platform/banan-os-GNU-CXX.cmake b/toolchain/cmake-platform/banan-os-GNU-CXX.cmake
new file mode 100644
index 00000000..2f8a4460
--- /dev/null
+++ b/toolchain/cmake-platform/banan-os-GNU-CXX.cmake
@@ -0,0 +1,2 @@
+include(Platform/banan-os-GNU)
+__banan_os_compiler_gnu(CXX)
diff --git a/toolchain/cmake-platform/banan-os-GNU.cmake b/toolchain/cmake-platform/banan-os-GNU.cmake
new file mode 100644
index 00000000..300abe6e
--- /dev/null
+++ b/toolchain/cmake-platform/banan-os-GNU.cmake
@@ -0,0 +1,20 @@
+# This module is shared by multiple languages; use include blocker.
+include_guard()
+
+macro(__banan_os_compiler_gnu lang)
+  set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG "-Wl,-rpath,")
+  set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG_SEP ":")
+  set(CMAKE_SHARED_LIBRARY_RPATH_LINK_${lang}_FLAG "-Wl,-rpath-link,")
+  set(CMAKE_SHARED_LIBRARY_SONAME_${lang}_FLAG "-Wl,-soname,")
+  set(CMAKE_EXE_EXPORTS_${lang}_FLAG "-Wl,--export-dynamic")
+
+  # Initialize link type selection flags.  These flags are used when
+  # building a shared library, shared module, or executable that links
+  # to other libraries to select whether to use the static or shared
+  # versions of the libraries.
+  foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
+    set(CMAKE_${type}_LINK_STATIC_${lang}_FLAGS "-Wl,-Bstatic")
+    set(CMAKE_${type}_LINK_DYNAMIC_${lang}_FLAGS "-Wl,-Bdynamic")
+  endforeach()
+
+endmacro()
diff --git a/toolchain/cmake-platform/banan-os-Initialize.cmake b/toolchain/cmake-platform/banan-os-Initialize.cmake
new file mode 100644
index 00000000..e5fa117d
--- /dev/null
+++ b/toolchain/cmake-platform/banan-os-Initialize.cmake
@@ -0,0 +1,2 @@
+set(BANAN_OS 1)
+set(UNIX 1)
diff --git a/toolchain/cmake-platform/banan-os.cmake b/toolchain/cmake-platform/banan-os.cmake
new file mode 100644
index 00000000..fa3d3ce2
--- /dev/null
+++ b/toolchain/cmake-platform/banan-os.cmake
@@ -0,0 +1,9 @@
+set(CMAKE_DL_LIBS "")
+set(CMAKE_SHARED_LIBRARY_RPATH_ORIGIN_TOKEN "\$ORIGIN")
+set(CMAKE_SHARED_LIBRARY_SUFFIX ".so")
+
+# Shared libraries with no builtin soname may not be linked safely by
+# specifying the file path.
+set(CMAKE_PLATFORM_USES_PATH_WHEN_NO_SONAME 1)
+
+include(Platform/UnixPaths)