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1 # Example config.mk
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2 #
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3 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 # See https://llvm.org/LICENSE.txt for license information.
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5 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6
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7 # Subprojects to build
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8 # For now, LLVM-libc project will focus only "math" functions.
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9 SUBS = math # string networking
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10
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11 # Target architecture: aarch64, arm or x86_64
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12 # For now, LLVM-libc project will focus on x86_64 only.
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13 ARCH = x86_64
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14
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15 # Compiler for the target
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16 CC = $(CROSS_COMPILE)gcc
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17 CFLAGS = -std=c99 -pipe -O3
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18 CFLAGS += -Wall -Wno-missing-braces
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19 CFLAGS += -Werror=implicit-function-declaration
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20
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21 # Used for test case generator that is executed on the host
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22 HOST_CC = gcc
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23 HOST_CFLAGS = -std=c99 -O2
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24 HOST_CFLAGS += -Wall -Wno-unused-function
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25
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26 # Enable debug info.
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27 HOST_CFLAGS += -g
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28 CFLAGS += -g
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29
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30 # Optimize the shared libraries on aarch64 assuming they fit in 1M.
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31 #CFLAGS_SHARED = -fPIC -mcmodel=tiny
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32
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33 # Use for cross compilation with gcc.
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34 #CROSS_COMPILE = aarch64-none-linux-gnu-
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35
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36 # Use with cross testing.
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37 #EMULATOR = qemu-aarch64-static
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38 #EMULATOR = sh -c 'scp $$1 user@host:/dir && ssh user@host /dir/"$$@"' --
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39
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40 # Additional flags for subprojects.
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41 math-cflags =
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42 math-ldlibs =
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43 math-ulpflags =
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44 math-testflags =
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45 string-cflags =
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46 networking-cflags =
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47
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48 # Use if mpfr is available on the target for ulp error checking.
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49 #math-ldlibs += -lmpfr -lgmp
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50 #math-cflags += -DUSE_MPFR
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51
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52 # Use with gcc.
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53 math-cflags += -frounding-math -fexcess-precision=standard -fno-stack-protector
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54 math-cflags += -ffp-contract=fast -fno-math-errno
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55
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56 # Use with clang.
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57 #math-cflags += -ffp-contract=fast
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58
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59 # Disable vector math code
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60 #math-cflags += -DWANT_VMATH=0
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61
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62 # Disable fenv checks
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63 #math-ulpflags = -q -f
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64 #math-testflags = -nostatus
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65
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66 # Enable assertion checks.
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67 #networking-cflags += -DWANT_ASSERT
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68
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69 # Avoid auto-vectorization of scalar code and unroll loops
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70 networking-cflags += -O2 -fno-tree-vectorize -funroll-loops
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