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cmake: fix zephyr_get_system_include_directories_for_lang() function

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This commit fixes the zephyr_get_system_include_directories_for_lang()
function in the event that no system include directories are specified
for Zephyr interface.

This fixes an issue where the value returned by this function is
`-isystem` with no directory.

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
This commit is contained in:
Torsten Rasmussen 2020-09-21 22:32:34 +02:00 • committed by Maureen Helm
commit 5d473dc092
1 changed files with 1 additions and 1 deletions
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cmake/extensions.cmake
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@ -217,7 +217,7 @@ function(zephyr_get_system_include_directories_for_lang lang i)
process_flags(${lang} flags output_list) process_flags(${lang} flags output_list)
string(REPLACE ";" "$<SEMICOLON>" genexp_output_list "${output_list}") string(REPLACE ";" "$<SEMICOLON>" genexp_output_list "${output_list}")
set(result_output_list "-isystem$<JOIN:${genexp_output_list}, -isystem>") set(result_output_list "$<$<BOOL:${genexp_output_list}>:-isystem$<JOIN:${genexp_output_list}, -isystem>>")
set(${i} ${result_output_list} PARENT_SCOPE) set(${i} ${result_output_list} PARENT_SCOPE)
endfunction() endfunction()