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Victor L. Do Nascimento
c6e601de84
libc: arm: Implement setjmp GCC backwards compatibility.
When compiling Newlib for arm targets with GCC 12.1 onward, the passing of architecture extension information to the assembler is automatic, making the use of .fpu and .arch_extension directives in assembly files redundant. With older versions of GCC, however, these directives must be hard-coded into the `arm/setjmp.S' file to allow the assembly of instructions concerning the storage and subsequent reloading of the floating point registers to/from the jump buffer, respectively. This patch conditionally adds the `.fpu vfpxd' and `.arch_extension mve' directives based on compile-time preprocessor macros concerning GCC version and target architectural features, such that both the assembly and linking of setjmp.S succeeds for older versions of Newlib.
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