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-rw-r--r--release_docs/INSTALL_CMake.txt28
1 files changed, 28 insertions, 0 deletions
diff --git a/release_docs/INSTALL_CMake.txt b/release_docs/INSTALL_CMake.txt
index 7352dae..edd876a 100644
--- a/release_docs/INSTALL_CMake.txt
+++ b/release_docs/INSTALL_CMake.txt
@@ -324,6 +324,34 @@ IV. Further considerations
-DHDF5_ENABLE_SZIP_SUPPORT:BOOL=OFF -DHDF5_ENABLE_Z_LIB_SUPPORT:BOOL=OFF \
-DCMAKE_BUILD_TYPE:STRING=Release ..
+ 6. CMake uses a toolchain of utilities to compile, link libraries and
+ create archives, and other tasks to drive the build. The toolchain
+ utilities available are determined by the languages enabled. In normal
+ builds, CMake automatically determines the toolchain for host builds
+ based on system introspection and defaults. In cross-compiling
+ scenarios, a toolchain file may be specified with information about
+ compiler and utility paths.
+ Variables and Properties
+ Several variables relate to the language components of a toolchain which
+ are enabled. CMAKE_<LANG>_COMPILER is the full path to the compiler used
+ for <LANG>. CMAKE_<LANG>_COMPILER_ID is the identifier used by CMake for
+ the compiler and CMAKE_<LANG>_COMPILER_VERSION is the version of the compiler.
+
+ The CMAKE_<LANG>_FLAGS variables and the configuration-specific equivalents
+ contain flags that will be added to the compile command when compiling a
+ file of a particular language.
+
+ As the linker is invoked by the compiler driver, CMake needs a way to
+ determine which compiler to use to invoke the linker. This is calculated
+ by the LANGUAGE of source files in the target, and in the case of static
+ libraries, the language of the dependent libraries. The choice CMake makes
+ may be overridden with the LINKER_LANGUAGE target property.
+
+ See the CMake help for more information on using toolchain files.
+
+ To use a toolchain file with the supplied cmake scripts, see the
+ HDF5options.cmake file under the toolchain section.
+
Notes: CMake and HDF5
1. Using CMake for building and using HDF5 is under active development.