[c21d4d6] | 1 | #
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| 2 | # Copyright (c) 2019 Jiří Zárevúcky
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| 3 | # All rights reserved.
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| 4 | #
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| 5 | # Redistribution and use in source and binary forms, with or without
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| 6 | # modification, are permitted provided that the following conditions
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| 7 | # are met:
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| 8 | #
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| 9 | # - Redistributions of source code must retain the above copyright
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| 10 | # notice, this list of conditions and the following disclaimer.
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| 11 | # - Redistributions in binary form must reproduce the above copyright
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| 12 | # notice, this list of conditions and the following disclaimer in the
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| 13 | # documentation and/or other materials provided with the distribution.
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| 14 | # - The name of the author may not be used to endorse or promote products
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| 15 | # derived from this software without specific prior written permission.
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| 16 | #
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| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | #
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| 28 |
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[200b2113] | 29 | # This file sets the architecture-independent compiler flags used throughout
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| 30 | # this repository.
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| 31 | # For architecture-specific flags, see $srcroot/meson/cross/$arch.
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| 32 |
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| 33 | add_project_arguments(
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| 34 | # TODO: Remove from project arguments and only use where necessary.
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| 35 | # Any change in config forces everything to rebuild due to lack of granularity here.
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| 36 | '-imacros', meson.build_root() / 'config.h',
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| 37 | language : [ 'c' ],
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| 38 | )
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| 39 |
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| 40 | add_project_link_arguments(
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[18969ce] | 41 | '-Wl,--gc-sections',
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| 42 | '-Wl,--warn-common',
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[200b2113] | 43 | '-Wl,--fatal-warnings',
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[3fcea34] | 44 | '-Wl,-z,text',
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[200b2113] | 45 | language : [ 'c', 'cpp' ],
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| 46 | )
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| 47 |
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| 48 | # TODO: enable more warnings
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| 49 | # FIXME: -fno-builtin-strftime works around seemingly spurious format warning.
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| 50 | # We should investigate what's going on there.
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| 51 |
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| 52 | extra_common_flags = [
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| 53 | '-O' + OPTIMIZATION,
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| 54 | '-fexec-charset=UTF-8',
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| 55 | '-finput-charset=UTF-8',
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| 56 |
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| 57 | '-D_HELENOS_SOURCE',
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| 58 |
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| 59 | '-Wa,--fatal-warnings',
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[3fcea34] | 60 | '-Wl,-z,text',
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[200b2113] | 61 |
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| 62 | '-Wall',
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| 63 | '-Wextra',
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| 64 | '-Wwrite-strings',
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| 65 | '-Wunknown-pragmas',
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| 66 |
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| 67 | '-Wno-unused-parameter',
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| 68 |
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| 69 | '-pipe',
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| 70 |
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| 71 | '-ffunction-sections',
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[c89ae25] | 72 | '-fdata-sections',
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[200b2113] | 73 | '-fno-common',
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[2fbb42f] | 74 | '-fdebug-prefix-map=' + meson.source_root() + '/=',
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| 75 | '-fdebug-prefix-map=../../=',
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[200b2113] | 76 | ]
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| 77 |
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| 78 | if cc.get_id() != 'clang'
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| 79 | # Clang's own headers emit macro redefinition warnings.
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| 80 | extra_common_flags += '-Wsystem-headers'
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| 81 | endif
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| 82 |
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| 83 | if UARCH != 'ia64'
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| 84 | extra_common_flags += [ '-fvar-tracking-assignments' ]
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| 85 | endif
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| 86 |
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| 87 | if CONFIG_DEBUG
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| 88 | extra_common_flags += [ '-Werror' ]
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| 89 | endif
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| 90 |
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| 91 | if CONFIG_LINE_DEBUG
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[2fbb42f] | 92 | extra_common_flags += [ '-gdwarf-5', '-g3' ]
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[200b2113] | 93 | endif
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| 94 |
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| 95 | extra_cflags = extra_common_flags + [
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| 96 | '-Wmissing-prototypes',
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[765995a] | 97 | '-Werror-implicit-function-declaration',
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[200b2113] | 98 |
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| 99 | '-Wno-missing-braces',
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| 100 | '-Wno-missing-field-initializers',
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| 101 | '-Wno-unused-command-line-argument',
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| 102 | '-Wno-unused-parameter',
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| 103 | '-Wno-typedef-redefinition',
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| 104 | '-Wno-clobbered',
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| 105 | '-Wno-nonnull-compare',
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| 106 |
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| 107 | '-fno-builtin-strftime',
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| 108 | ]
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| 109 |
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| 110 | if CONFIG_UBSAN
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| 111 | extra_cflags += '-fsanitize=undefined'
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| 112 | endif
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| 113 |
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| 114 | extra_cppflags = extra_common_flags + [
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| 115 | '-fno-exceptions',
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[8f9f9b1] | 116 | '-Wno-misleading-indentation',
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[200b2113] | 117 | '-frtti',
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| 118 | ]
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| 119 |
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| 120 | w_flags = {
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| 121 | 'c': extra_cflags,
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| 122 | 'cpp': extra_cppflags,
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| 123 | }
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| 124 |
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| 125 | # TODO: To remove noise in Meson output, we may want to cut down on
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| 126 | # the explicitly checked flags and just enable those supported by
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| 127 | # both gcc and clang unconditionally.
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| 128 |
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| 129 | # Process flags. Only sets those that compiler supports.
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| 130 | foreach lang : [ 'c', 'cpp' ]
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| 131 | extra_cflags = meson.get_compiler(lang).get_supported_arguments(w_flags.get(lang))
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| 132 | add_project_arguments(extra_cflags, language : [ lang ])
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| 133 | add_project_link_arguments(extra_cflags, language : [ lang ])
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| 134 | endforeach
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[62721d5] | 135 |
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| 136 | # This flag is needed at several places, hence we define it here.
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| 137 | #
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| 138 | # For backwards compatibility we try to detect --no-warn-rwx-segments.
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| 139 | # However, the autodetection done by Meson also results in
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| 140 | # "cannot find entry symbol _start; defaulting to 00000000004000b0"
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| 141 | # thus the option is never supported alone. So when detecting we also
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| 142 | # specify --entry=main so that the stub source provided by Meson is build
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| 143 | # correctly.
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| 144 | ldflags_ignore_rwx_segments = []
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| 145 | if cc.has_link_argument('-Wl,--no-warn-rwx-segments,--entry=main')
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| 146 | ldflags_ignore_rwx_segments += ['-Wl,--no-warn-rwx-segments']
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| 147 | endif
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