Add CMake support

1 files changed, 115 insertions, 0 deletions

diff --git a/cmake/Modules/Version.cmake b/cmake/Modules/Version.cmake
new file mode 100644
index 0000000..96ee6b7
--- /dev/null
+++ b/cmake/Modules/Version.cmake
@@ -0,0 +1,115 @@
+# Portions of this file have been borrowed from and/or inspired by
+# the Version.cmake from the rtl-sdr project.
+#   http://sdr.osmocom.org/trac/wiki/rtl-sdr
+#
+# Provides:
+#   ${VERSION_INFO_BASE}     -  Major.Minor.Patch
+#   ${VERSION_INFO}          -  Major.minor.Patch[-git_info]
+#
+# Requires values for:
+#   ${VERSION_INFO_MAJOR}    - Increment on API compatibility changes.
+#   ${VERSION_INFO_MINOR}    - Increment when adding features.
+#   ${VERSION_INFO_PATCH}    - Increment for bug and documentation changes.
+#
+# Optional:
+#   ${VERSION_INFO_EXTRA}    - Set to "git" to append git info. This is
+#                              intended only for non-versioned development
+#                              builds
+#   ${VERSION_INFO_OVERRIDE} - Set to a non-null value to override the
+#                              VERSION_INFO_EXTRA logic. This is intended
+#                              for automated snapshot builds from exported
+#                              trees, to pass in the git revision info.
+#
+if(DEFINED __INCLUDED_TOOLAME-DAB_VERSION_CMAKE)
+    return()
+endif()
+set(__INCLUDED_TOOLAME-DAB_VERSION_CMAKE TRUE)
+
+################################################################################
+# Gather up variables provided by parent script
+################################################################################
+
+if(NOT DEFINED VERSION_INFO_MAJOR)
+    message(FATAL_ERROR "VERSION_INFO_MAJOR is not defined")
+else()            
+    set(VER_MAJ ${VERSION_INFO_MAJOR})
+endif()
+
+if(NOT DEFINED VERSION_INFO_MINOR)
+    message(FATAL_ERROR "VERSION_INFO_MINOR is not defined")
+else()            
+    set(VER_MIN ${VERSION_INFO_MINOR})
+endif()
+
+if(NOT DEFINED VERSION_INFO_PATCH)
+    message(FATAL_ERROR "VERSION_INFO_PATCH is not defined")
+else()            
+    set(VER_PAT ${VERSION_INFO_PATCH})
+endif()
+
+
+################################################################################
+# Craft version number, using git, if needed
+################################################################################
+find_package(Git QUIET)
+
+if(GIT_FOUND)
+    execute_process(
+        COMMAND ${GIT_EXECUTABLE} rev-parse --
+        ERROR_QUIET
+        RESULT_VARIABLE NOT_GIT_REPOSITORY
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    )
+
+    if(NOT_GIT_REPOSITORY)
+        set(GIT_INFO "-unknown")
+    else()
+        execute_process(
+            COMMAND ${GIT_EXECUTABLE} rev-parse --short HEAD --
+            OUTPUT_VARIABLE GIT_REV OUTPUT_STRIP_TRAILING_WHITESPACE
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        )
+
+        execute_process(
+            COMMAND ${GIT_EXECUTABLE} diff-index --quiet HEAD --
+            RESULT_VARIABLE GIT_DIRTY
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        )
+
+        if(GIT_DIRTY)
+            set(GIT_INFO "-${GIT_REV}-dirty")
+        else()
+            set(GIT_INFO "-${GIT_REV}")
+        endif()
+    endif()
+
+else()
+    message(WARNING "git missing -- unable to check libladeRF version.")
+    unset(NOT_GIT_REPOSITORY)
+    unset(GIT_REV)
+    unset(GIT_DIRTY)
+endif()
+
+
+################################################################################
+# Provide 
+################################################################################
+set(VERSION_INFO_BASE "${VER_MAJ}.${VER_MIN}.${VER_PAT}")
+
+# Force the version suffix.  Used for automated export builds.
+if(VERSION_INFO_OVERRIDE)
+    set(VERSION_INFO "${VERSION_INFO_BASE}-${VERSION_INFO_OVERRIDE}")
+
+# Intra-release builds
+elseif("${VERSION_INFO_EXTRA}" STREQUAL "git")
+    set(VERSION_INFO "${VERSION_INFO_BASE}-git${GIT_INFO}")
+
+# Versioned releases
+elseif("${VERSION_INFO_EXTRA}" STREQUAL "")
+    set(VERSION_INFO "${VERSION_INFO_BASE}")
+
+# Invalid 
+else() 
+    message(FATAL_ERROR 
+        "Unexpected definition of VERSION_INFO_EXTRA: ${VERSION_INFO_EXTRA}")
+endif()