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Avoid recompiling option_parser every time cmake runs.

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Switch to `configure_file`, which won't touch the output file unless
the contents change.
This commit is contained in:
Allison Vacanti
2021-03-18 16:07:40 -04:00
parent 52d3dfec8c
commit 8b7a2e86b8
2 changed files with 5 additions and 2 deletions
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6
cmake/FileToString.cmake
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@@ -3,11 +3,13 @@
# Create a C++ file `file_out` that defines a string named `string_name` in # Create a C++ file `file_out` that defines a string named `string_name` in
# `namespace`, which contains the contents of `file_in`. # `namespace`, which contains the contents of `file_in`.
# Cache this so we can access it from wherever file_to_string is called.
set(_nvbench_file_to_string_path "${CMAKE_CURRENT_LIST_DIR}/FileToString.in")
function(file_to_string file_in file_out namespace string_name) function(file_to_string file_in file_out namespace string_name)
file(READ "${file_in}" file_in_contents) file(READ "${file_in}" file_in_contents)
set(file_out_contents) set(file_out_contents)
string(APPEND file_out_contents string(APPEND file_to_string_payload
"#include <string>\n" "#include <string>\n"
"namespace ${namespace} {\n" "namespace ${namespace} {\n"
"const std::string ${string_name} =\n" "const std::string ${string_name} =\n"
@@ -15,5 +17,5 @@ function(file_to_string file_in file_out namespace string_name)
"}\n" "}\n"
) )
file(WRITE "${file_out}" "${file_out_contents}") configure_file("${_nvbench_file_to_string_path}" "${file_out}")
endfunction() endfunction()

1
cmake/FileToString.in Normal file
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@@ -0,0 +1 @@
${file_to_string_payload}