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[POC] cmake: Add option to run include-what-you-use with compiler #1204

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[POC] cmake: Add option to run include-what-you-use with compiler #1204

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14 changes: 14 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -132,6 +132,17 @@ option(SECP256K1_BUILD_EXHAUSTIVE_TESTS "Build exhaustive tests." ON)
option(SECP256K1_BUILD_CTIME_TESTS "Build constant-time tests." ${SECP256K1_VALGRIND})
option(SECP256K1_BUILD_EXAMPLES "Build examples." OFF)

if(CMAKE_VERSION VERSION_GREATER 3.2)
option(SECP256K1_ENABLE_IWYU "Run include-what-you-use (IWYU) with the compiler." OFF)
if(SECP256K1_ENABLE_IWYU)
find_program(INCLUDE_WHAT_YOU_USE_COMMAND NAMES include-what-you-use)
if(NOT INCLUDE_WHAT_YOU_USE_COMMAND)
message(FATAL_ERROR "SECP256K1_ENABLE_IWYU is ON but include-what-you-use is not found.")
endif()
set(CMAKE_C_INCLUDE_WHAT_YOU_USE "${INCLUDE_WHAT_YOU_USE_COMMAND}")
endif()
endif()

# Redefine configuration flags.
# We leave assertions on, because they are only used in the examples, and we want them always on there.
if(MSVC)
Expand Down Expand Up @@ -269,6 +280,9 @@ get_directory_property(definitions COMPILE_DEFINITIONS)
string(REPLACE ";" " " definitions "${definitions}")
message("Preprocessor defined macros ........... ${definitions}")
message("C compiler ............................ ${CMAKE_C_COMPILER}")
if(SECP256K1_ENABLE_IWYU)
message("Run IWYU with the compiler ............ ${CMAKE_C_INCLUDE_WHAT_YOU_USE}")
endif()
message("CFLAGS ................................ ${CMAKE_C_FLAGS}")
get_directory_property(compile_options COMPILE_OPTIONS)
string(REPLACE ";" " " compile_options "${compile_options}")
Expand Down