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Build using GNU extensions #52

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opened 2019-06-11 12:06:51 +02:00 by devnexen · 6 comments
devnexen commented 2019-06-11 12:06:51 +02:00
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-fsplit-stack flag is GNU extension thus might not working with all combinations of compilers/oses (FreeBSD/gcc for instance).

Also with Linux and FreeBSD clang

clang -fPIC -Iinclude -I. -W -Wunused -Wall -DPH7_LIBRARY_SUFFIX=\".so\" -O0 -g3 -fsplit-stack -c engine/lib/libfmt.c -o build/engine/lib/libfmt.o fatal error: error in backend: Segmented stacks do not support vararg functions. clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)

-fsplit-stack flag is GNU extension thus might not working with all combinations of compilers/oses (FreeBSD/gcc for instance). Also with Linux and FreeBSD clang ` clang -fPIC -Iinclude -I. -W -Wunused -Wall -DPH7_LIBRARY_SUFFIX=\".so\" -O0 -g3 -fsplit-stack -c engine/lib/libfmt.c -o build/engine/lib/libfmt.o fatal error: error in backend: Segmented stacks do not support vararg functions. clang: error: clang frontend command failed with exit code 70 (use -v to see invocation) `
belliash commented 2019-06-11 15:39:22 +02:00
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https://llvm.org/docs/SegmentedStacks.html
https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fsplit-stack

According to mentioned documentation, same option should be available under clang, isn't it?

https://llvm.org/docs/SegmentedStacks.html https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fsplit-stack According to mentioned documentation, same option should be available under clang, isn't it?
belliash commented 2019-06-11 15:41:22 +02:00
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Seems like a bug in LLVM: https://bugs.llvm.org/show_bug.cgi?id=19197

Seems like a bug in LLVM: https://bugs.llvm.org/show_bug.cgi?id=19197
devnexen commented 2019-06-11 15:48:29 +02:00
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Oh the flag is supported, I was just highlighting the build issue. Will try with other versions eventually.

Segmented stacks do not support vararg functions

Wonders if it works under MacOS ...

Oh the flag is supported, I was just highlighting the build issue. Will try with other versions eventually. `Segmented stacks do not support vararg functions` Wonders if it works under MacOS ...
belliash commented 2019-06-12 06:51:12 +02:00
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Seems, this option is unavailable on OSX. I think, it can work only under Linux.

Seems, this option is unavailable on OSX. I think, it can work only under Linux.
devnexen commented 2019-06-12 08:48:55 +02:00
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Makes sense, I think (w/o being 100% sure) clang in mac is built w/o GNU extensions.

Makes sense, I think (w/o being 100% sure) clang in mac is built w/o GNU extensions.
belliash commented 2019-06-12 09:53:49 +02:00
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Fixed build on systems other to Linux with commit da2e74ba08.

Fixed build on systems other to Linux with commit da2e74ba08.
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