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author | Tanzinul Islam <tanzinul.islam@gmail.com> | 2020-12-13 18:01:46 +0000 |
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committer | Dmitry Belyavskiy <beldmit@gmail.com> | 2021-04-19 11:05:55 +0200 |
commit | 491a1e3363228e8276ee293a86acd7a961ffe9d3 (patch) | |
tree | ec0d2baa0debc8c08f0e75fbcb3cfa3792395803 /Configurations/platform | |
parent | 16f2a44435fccbd7466b0659220c765a17e5d0c0 (diff) |
Link with .def files
MSVC's `link.exe` automatically finds `__cdecl` C functions (which are
decorated with a leading underscore by the compiler) when they are
mentioned in a `.def` file without the leading underscore. This is an
[under-documented feature][1] of MSVC's `link.exe`. C++Builder's
`ilink32.exe` doesn't do this, and thus needs the name-translation in
the `.def` file. Then `implib.exe` needs to be told to re-add it.
(The Clang-based `bcc32c.exe` doesn't implement the [`-vu` or `-u-`][2]
options to skip adding the leading underscore to `__cdecl` C function
names, so this is the only way to have things work with non-underscored
export names in the DLLs.)
[1]: https://github.com/MicrosoftDocs/cpp-docs/issues/2653
[2]: http://docwiki.embarcadero.com/RADStudio/Sydney/en/Options_Not_Supported_by_Clang-enhanced_C%2B%2B_Compilers#BCC32_Options_that_Are_Not_Supported_by_Clang-enhanced_C.2B.2B_Compilers
Also silence linker warnings on duplicate symbols and ensure that error-
case cleanup in link rules work in C++Builder's `make.exe`.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/13540)
Diffstat (limited to 'Configurations/platform')
-rw-r--r-- | Configurations/platform/Windows/cppbuilder.pm | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Configurations/platform/Windows/cppbuilder.pm b/Configurations/platform/Windows/cppbuilder.pm new file mode 100644 index 0000000000..b4d208d6d4 --- /dev/null +++ b/Configurations/platform/Windows/cppbuilder.pm @@ -0,0 +1,16 @@ +package platform::Windows::cppbuilder; + +use vars qw(@ISA); + +require platform::Windows::MSVC; +@ISA = qw(platform::Windows::MSVC); + +sub pdbext { '.tds' } + +# C++Builder's Clang-based compilers prepend an underscore to __cdecl-convention +# C functions, and the linker needs those as the InternalName in the .def file. +sub export2internal { + return "_$_[1]"; +} + +1; |