CMake Module for finding libm

cmake/FindLibM.cmake

@@ -0,0 +1,46 @@
+#.rst:
+# FindLibM
+# --------
+#
+# Find the native realtime includes and library.
+#
+# IMPORTED Targets
+# ^^^^^^^^^^^^^^^^
+#
+# This module defines :prop_tgt:`IMPORTED` target ``LIBM::LIBM``, if
+# LIBM has been found.
+#
+# Result Variables
+# ^^^^^^^^^^^^^^^^
+#
+# This module defines the following variables:
+#
+# ::
+#
+#   LIBM_INCLUDE_DIRS  - where to find math.h, etc.
+#   LIBM_LIBRARIES     - List of libraries when using libm.
+#   LIBM_FOUND         - True if math library found.
+#
+# Hints
+# ^^^^^
+#
+# A user may set ``LIBM_ROOT`` to a math library installation root to tell this
+# module where to look.
+
+find_path(LIBM_INCLUDE_DIRS
+  NAMES math.h
+  PATHS ${LIBM_ROOT}/include/
+)
+find_library(LIBM_LIBRARIES m)
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LibM DEFAULT_MSG LIBM_LIBRARIES LIBM_INCLUDE_DIRS)
+mark_as_advanced(LIBM_INCLUDE_DIRS LIBM_LIBRARIES)
+
+if(LIBM_FOUND)
+    if(NOT TARGET LIBM::LIBM)
+      add_library(LIBM::LIBM UNKNOWN IMPORTED)
+      set_target_properties(LIBM::LIBM PROPERTIES
+        IMPORTED_LOCATION "${LIBM_LIBRARIES}"
+        INTERFACE_INCLUDE_DIRECTORIES "${LIBM_INCLUDE_DIRS}")
+    endif()
+endif()