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Add function to remove last filename extension

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Add a new function that takes a string and removes the
portion following the last '.' character, usually a file
extension. This would transform:
 * "a.b.c" into "a.b"
 * "name." into "name"
 * ".name" into ""
 * "no_dot" into "no_dot" (i.e. no change)

CMake's existing file-extension-removal command removes
the largest possible extension which would make "a.b.c"
into "a", which is incorrect for handling tests that have
'.'s within their names.

The desired behaviour was added in CMake 3.14, but we
support CMake >= 3.5.1 (for 3.0) and >= 2.8.12.2 (for 2.x)
at the time of writing.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
This commit is contained in:
David Horstmann 2021-10-19 18:37:04 +01:00
parent 1732b5d6ee
commit b3a5424a4e
1 changed files with 16 additions and 0 deletions
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16
CMakeLists.txt
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@ -136,6 +136,22 @@ function(link_to_source base_name)
endif()
endfunction(link_to_source)
# Get the filename without the final extension (i.e. convert "a.b.c" to "a.b")
function(get_name_without_last_ext dest_var full_name)
# Split into a list on '.' (but a cmake list is just a ';'-separated string)
string(REPLACE "." ";" ext_parts "${full_name}")
# Remove the last item if there are more than one
list(LENGTH ext_parts ext_parts_len)
if (${ext_parts_len} GREATER "1")
math(EXPR ext_parts_last_item "${ext_parts_len} - 1")
list(REMOVE_AT ext_parts ${ext_parts_last_item})
endif()
# Convert back to a string by replacing separators with '.'
string(REPLACE ";" "." no_ext_name "${ext_parts}")
# Copy into the desired variable
set(${dest_var} ${no_ext_name} PARENT_SCOPE)
endfunction(get_name_without_last_ext)
string(REGEX MATCH "Clang" CMAKE_COMPILER_IS_CLANG "${CMAKE_C_COMPILER_ID}")
include(CheckCCompilerFlag)