thakis created this revision. https://blogs.msdn.microsoft.com/vcblog/2016/11/16/permissive-switch/ makes it sound like this is similar to -pedantic, which we currently don't expose from clang-cl. So map it to that for now and see how that feels in practice.
Looks like cl.exe only has a flag for /permissive-, but no explicit flag for /permissive (the default). https://reviews.llvm.org/D32435 Files: include/clang/Driver/CLCompatOptions.td test/Driver/cl-options.c Index: test/Driver/cl-options.c =================================================================== --- test/Driver/cl-options.c +++ test/Driver/cl-options.c @@ -180,6 +180,9 @@ // RUN: %clang_cl --target=i686-pc-win32 -Werror /Oy- -### -- %s 2>&1 | FileCheck -check-prefix=Oy_ %s // Oy_: -mdisable-fp-elim +// RUN: %clang_cl /permissive- --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=permissive_ %s +// permissive_: -pedantic + // RUN: %clang_cl /Qvec -### -- %s 2>&1 | FileCheck -check-prefix=Qvec %s // Qvec: -vectorize-loops Index: include/clang/Driver/CLCompatOptions.td =================================================================== --- include/clang/Driver/CLCompatOptions.td +++ include/clang/Driver/CLCompatOptions.td @@ -111,6 +111,8 @@ AliasArgs<["s"]>; def _SLASH_Ot : CLFlag<"Ot">, HelpText<"Optimize for speed">, Alias<O>, AliasArgs<["2"]>; +def _SLASH_permissive_ : CLFlag<"permissive-">, Alias<pedantic>, + HelpText<"Diagnose use of nonstandard language extensions">; def _SLASH_QUESTION : CLFlag<"?">, Alias<help>, HelpText<"Display available options">; def _SLASH_Qvec : CLFlag<"Qvec">,
Index: test/Driver/cl-options.c =================================================================== --- test/Driver/cl-options.c +++ test/Driver/cl-options.c @@ -180,6 +180,9 @@ // RUN: %clang_cl --target=i686-pc-win32 -Werror /Oy- -### -- %s 2>&1 | FileCheck -check-prefix=Oy_ %s // Oy_: -mdisable-fp-elim +// RUN: %clang_cl /permissive- --target=i686-pc-windows-msvc -### -- %s 2>&1 | FileCheck -check-prefix=permissive_ %s +// permissive_: -pedantic + // RUN: %clang_cl /Qvec -### -- %s 2>&1 | FileCheck -check-prefix=Qvec %s // Qvec: -vectorize-loops Index: include/clang/Driver/CLCompatOptions.td =================================================================== --- include/clang/Driver/CLCompatOptions.td +++ include/clang/Driver/CLCompatOptions.td @@ -111,6 +111,8 @@ AliasArgs<["s"]>; def _SLASH_Ot : CLFlag<"Ot">, HelpText<"Optimize for speed">, Alias<O>, AliasArgs<["2"]>; +def _SLASH_permissive_ : CLFlag<"permissive-">, Alias<pedantic>, + HelpText<"Diagnose use of nonstandard language extensions">; def _SLASH_QUESTION : CLFlag<"?">, Alias<help>, HelpText<"Display available options">; def _SLASH_Qvec : CLFlag<"Qvec">,
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