Automatically use the ELFv2 ABI on powerpc64 if supported by the compiler.
This has the same effects on DDB working as -mcall=aixdesc, but also is supported by clang and marginally improves kernel performance. MFC after: 2 weeks
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=326202
@ -172,11 +172,17 @@ CFLAGS.gcc+= -mno-spe
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.endif
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#
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# Use dot symbols on powerpc64 to make ddb happy
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# Use dot symbols (or, better, the V2 ELF ABI) on powerpc64 to make
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# DDB happy. ELFv2, if available, has some other efficiency benefits.
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#
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.if ${MACHINE_ARCH} == "powerpc64"
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.if ${COMPILER_VERSION} >= 40900
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CFLAGS.gcc+= -mabi=elfv2
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.else
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CFLAGS.gcc+= -mcall-aixdesc
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.endif
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CFLAGS.clang+= -mabi=elfv2
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.endif
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#
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# For MIPS we also tell gcc to use floating point emulation
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