https://bugs.llvm.org/show_bug.cgi?id=48266
Bug ID: 48266
Summary: Discrepancy between predefined macros compared to ARM
GCC
Product: clang
Version: 11.0
Hardware: Other
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: valero...@gmail.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
Hi. I'm trying to use Clangd as a language server for embedded development. One
of the maintainers of Clangd suggested reporting my problem here.
I bumped into an issue when predefined macros that describe floating point
support generated by Clang differ from macros generated by ARM GCC.
For more detailed info please visit
https://github.com/clangd/clangd/issues/533#issuecomment-731405643
Here is the output from GCC:
arm-none-eabi-gcc -dM -E -mcpu=cortex-m4 -mthumb - < /dev/null | grep FP__
#define __SOFTFP__ 1
#define __VFP_FP__ 1
At the same time Clang generates only `VFP_FP`
./clang --target=arm-none-eabi -mcpu=cortex-m4 -mthumb -dM -xc /dev/null -c -v
-E | grep FP__
#define __VFP_FP__ 1
Thanks!
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