diff options
Diffstat (limited to 'meson.build')
| -rw-r--r-- | meson.build | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/meson.build b/meson.build index f0dd8aa089..c6f4b0cf5e 100644 --- a/meson.build +++ b/meson.build @@ -1944,6 +1944,24 @@ specific_ss.add(when: 'CONFIG_TCG', if_true: files( )) specific_ss.add(when: 'CONFIG_TCG_INTERPRETER', if_true: files('tcg/tci.c')) +# Work around a gcc bug/misfeature wherein constant propagation looks +# through an alias: +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99696 +# to guess that a const variable is always zero. Without lto, this is +# impossible, as the alias is restricted to page-vary-common.c. Indeed, +# without lto, not even the alias is required -- we simply use different +# declarations in different compilation units. +pagevary = files('page-vary-common.c') +if get_option('b_lto') + pagevary_flags = ['-fno-lto'] + if get_option('cfi') + pagevary_flags += '-fno-sanitize=cfi-icall' + endif + pagevary = static_library('page-vary-common', sources: pagevary, + c_args: pagevary_flags) + pagevary = declare_dependency(link_with: pagevary) +endif +common_ss.add(pagevary) specific_ss.add(files('page-vary.c')) subdir('backends') |