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-rw-r--r--Modules/CMakePackageConfigHelpers.cmake5
1 files changed, 4 insertions, 1 deletions
diff --git a/Modules/CMakePackageConfigHelpers.cmake b/Modules/CMakePackageConfigHelpers.cmake
index f388fe0..473bbe5 100644
--- a/Modules/CMakePackageConfigHelpers.cmake
+++ b/Modules/CMakePackageConfigHelpers.cmake
@@ -99,7 +99,7 @@
#
# ::
#
-# WRITE_BASIC_PACKAGE_VERSION_FILE( filename VERSION major.minor.patch COMPATIBILITY (AnyNewerVersion|SameMajorVersion|ExactVersion) )
+# WRITE_BASIC_PACKAGE_VERSION_FILE( filename [VERSION major.minor.patch] COMPATIBILITY (AnyNewerVersion|SameMajorVersion|ExactVersion) )
#
#
#
@@ -112,6 +112,9 @@
# filename is the output filename, it should be in the build tree.
# major.minor.patch is the version number of the project to be installed
#
+# If no ``VERSION`` is given, the :variable:`PROJECT_VERSION` variable
+# is used. If this hasn't been set, it errors out.
+#
# The COMPATIBILITY mode AnyNewerVersion means that the installed
# package version will be considered compatible if it is newer or
# exactly the same as the requested version. This mode should be used