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[mlir] Change deprecated -Werror-implicit-function-declaration to -Werror=implicit-function-declaration

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This -Werror- form has been deprecated since 2007 (GCC r122017).

And only enable it for CMAKE_C_FLAGS. C++ does not need it.
This commit is contained in:
Fangrui Song
2020-11-04 18:33:51 -08:00
parent 1dad9d4282
commit bf146857bb
1 changed files with 2 additions and 1 deletions
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3
mlir/CMakeLists.txt
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@@ -12,7 +12,8 @@ include(AddMLIR)
# Forbid implicit function declaration: this may lead to subtle bugs and we
# don't have a reason to support this.
add_flag_if_supported("-Werror-implicit-function-declaration" WERROR_IMPLICIT_FUNCTION_DECLARATION)
check_c_compiler_flag("-Werror=implicit-function-declaration" C_SUPPORTS_WERROR_IMPLICIT_FUNCTION_DECLARATION)
append_if(C_SUPPORTS_WERROR_IMPLICIT_FUNCTION_DECLARATION "-Werror=implicit-function-declaration" CMAKE_C_FLAGS)
# Installing the headers and docs needs to depend on generating any public
# tablegen'd targets.