llvm-project

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# Example config.mk
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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# Subprojects to build
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# For now, LLVM-libc project will focus only "math" functions.
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SUBS = math # string networking
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# Target architecture: aarch64, arm or x86_64
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# For now, LLVM-libc project will focus on x86_64 only.
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ARCH = x86_64
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# Compiler for the target
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CC = $(CROSS_COMPILE)gcc
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CFLAGS = -std=c99 -pipe -O3
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CFLAGS += -Wall -Wno-missing-braces
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CFLAGS += -Werror=implicit-function-declaration
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# Used for test case generator that is executed on the host
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HOST_CC = gcc
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HOST_CFLAGS = -std=c99 -O2
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HOST_CFLAGS += -Wall -Wno-unused-function
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# Enable debug info.
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HOST_CFLAGS += -g
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CFLAGS += -g
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# Optimize the shared libraries on aarch64 assuming they fit in 1M.
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#CFLAGS_SHARED = -fPIC -mcmodel=tiny
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# Use for cross compilation with gcc.
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#CROSS_COMPILE = aarch64-none-linux-gnu-
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# Use with cross testing.
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#EMULATOR = qemu-aarch64-static
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#EMULATOR = sh -c 'scp $$1 user@host:/dir && ssh user@host /dir/"$$@"' --
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# Additional flags for subprojects.
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math-cflags =
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math-ldlibs =
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math-ulpflags =
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math-testflags =
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string-cflags =
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networking-cflags =
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# Use if mpfr is available on the target for ulp error checking.
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#math-ldlibs += -lmpfr -lgmp
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#math-cflags += -DUSE_MPFR
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# Use with gcc.
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math-cflags += -frounding-math -fexcess-precision=standard -fno-stack-protector
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math-cflags += -ffp-contract=fast -fno-math-errno
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# Use with clang.
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#math-cflags += -ffp-contract=fast
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# Disable vector math code
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#math-cflags += -DWANT_VMATH=0
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# Disable fenv checks
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#math-ulpflags = -q -f
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#math-testflags = -nostatus
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# Enable assertion checks.
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#networking-cflags += -DWANT_ASSERT
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# Avoid auto-vectorization of scalar code and unroll loops
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networking-cflags += -O2 -fno-tree-vectorize -funroll-loops
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