freebsd-skq/lib/clang/llvm.build.mk
kevans 8ef9470bff llvm: add a build knob for enabling assertions
For head/, this will remain eternally default-on to maintain the status quo.
For stable/ branches, it should be flipped to default-off to maintain the
status quo.

There's value in being able to flip it one way or the other easily on head
or stable branches, whether you want to gain some performance back on head/
(for machines there's little chance you'll actually hit an assertion) or
potentially diagnose a problem with the version of llvm on an older branch.

Currently, stable branches get the CFLAGS+= -ndebug line uncommented; going
forward, they will instead have the default of LLVM_ASSERTIONS flipped.

Reviewed by:	dim, emaste, re (gjb)
MFC after:	1 week
MFC note:	flip the default of LLVM_ASSERTIONS
Differential Revision:	https://reviews.freebsd.org/D24264
2020-04-06 01:27:17 +00:00

109 lines
3.0 KiB
Makefile

# $FreeBSD$
.include <src.opts.mk>
.ifndef LLVM_BASE
.error Please define LLVM_BASE before including this file
.endif
.ifndef LLVM_SRCS
.error Please define LLVM_SRCS before including this file
.endif
.ifndef SRCDIR
.error Please define SRCDIR before including this file
.endif
.PATH: ${LLVM_BASE}/${SRCDIR}
CFLAGS+= -I${SRCTOP}/lib/clang/include
CFLAGS+= -I${LLVM_SRCS}/include
CFLAGS+= -D__STDC_CONSTANT_MACROS
CFLAGS+= -D__STDC_FORMAT_MACROS
CFLAGS+= -D__STDC_LIMIT_MACROS
CFLAGS+= -DHAVE_VCS_VERSION_INC
.if ${MK_LLVM_ASSERTIONS} == "no"
CFLAGS+= -DNDEBUG
.endif
TARGET_ARCH?= ${MACHINE_ARCH}
BUILD_ARCH?= ${MACHINE_ARCH}
# Armv6 and armv7 uses hard float abi, unless the CPUTYPE has soft in it.
# arm (for armv4 and armv5 CPUs) always uses the soft float ABI.
# For all other targets, we stick with 'unknown'.
.if ${TARGET_ARCH:Marmv[67]*} && (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "")
TARGET_ABI= -gnueabihf
.elif ${TARGET_ARCH:Marm*}
TARGET_ABI= -gnueabi
.else
TARGET_ABI=
.endif
VENDOR= unknown
OS_VERSION= freebsd13.0
LLVM_TARGET_TRIPLE?= ${TARGET_ARCH:C/amd64/x86_64/:C/[hs]f$//:S/mipsn32/mips64/}-${VENDOR}-${OS_VERSION}${TARGET_ABI}
LLVM_BUILD_TRIPLE?= ${BUILD_ARCH:C/amd64/x86_64/:C/[hs]f$//:S/mipsn32/mips64/}-${VENDOR}-${OS_VERSION}
CFLAGS+= -DLLVM_DEFAULT_TARGET_TRIPLE=\"${LLVM_TARGET_TRIPLE}\"
CFLAGS+= -DLLVM_HOST_TRIPLE=\"${LLVM_BUILD_TRIPLE}\"
CFLAGS+= -DDEFAULT_SYSROOT=\"${TOOLS_PREFIX}\"
.if ${MK_LLVM_TARGET_AARCH64} != "no"
CFLAGS+= -DLLVM_TARGET_ENABLE_AARCH64
. if ${MACHINE_CPUARCH} == "aarch64"
LLVM_NATIVE_ARCH= AArch64
. endif
.endif
.if ${MK_LLVM_TARGET_ARM} != "no"
CFLAGS+= -DLLVM_TARGET_ENABLE_ARM
. if ${MACHINE_CPUARCH} == "arm"
LLVM_NATIVE_ARCH= ARM
. endif
.endif
.if ${MK_LLVM_TARGET_BPF} != "no"
CFLAGS+= -DLLVM_TARGET_ENABLE_BPF
.endif
.if ${MK_LLVM_TARGET_MIPS} != "no"
CFLAGS+= -DLLVM_TARGET_ENABLE_MIPS
. if ${MACHINE_CPUARCH} == "mips"
LLVM_NATIVE_ARCH= Mips
. endif
.endif
.if ${MK_LLVM_TARGET_POWERPC} != "no"
CFLAGS+= -DLLVM_TARGET_ENABLE_POWERPC
. if ${MACHINE_CPUARCH} == "powerpc"
LLVM_NATIVE_ARCH= PowerPC
. endif
.endif
.if ${MK_LLVM_TARGET_RISCV} != "no"
CFLAGS+= -DLLVM_TARGET_ENABLE_RISCV
. if ${MACHINE_CPUARCH} == "riscv"
LLVM_NATIVE_ARCH= RISCV
. endif
.endif
.if ${MK_LLVM_TARGET_X86} != "no"
CFLAGS+= -DLLVM_TARGET_ENABLE_X86
. if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
LLVM_NATIVE_ARCH= X86
. endif
.endif
.ifdef LLVM_NATIVE_ARCH
CFLAGS+= -DLLVM_NATIVE_ASMPARSER=LLVMInitialize${LLVM_NATIVE_ARCH}AsmParser
CFLAGS+= -DLLVM_NATIVE_ASMPRINTER=LLVMInitialize${LLVM_NATIVE_ARCH}AsmPrinter
CFLAGS+= -DLLVM_NATIVE_DISASSEMBLER=LLVMInitialize${LLVM_NATIVE_ARCH}Disassembler
CFLAGS+= -DLLVM_NATIVE_TARGET=LLVMInitialize${LLVM_NATIVE_ARCH}Target
CFLAGS+= -DLLVM_NATIVE_TARGETINFO=LLVMInitialize${LLVM_NATIVE_ARCH}TargetInfo
CFLAGS+= -DLLVM_NATIVE_TARGETMC=LLVMInitialize${LLVM_NATIVE_ARCH}TargetMC
.endif
CFLAGS+= -ffunction-sections
CFLAGS+= -fdata-sections
LDFLAGS+= -Wl,--gc-sections
CXXSTD?= c++14
CXXFLAGS+= -fno-exceptions
CXXFLAGS+= -fno-rtti
CXXFLAGS.clang+= -stdlib=libc++