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build: build v8 with -fvisibility=hidden -fvisibility-inlines-hidden #56290

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Merged
merged 1 commit into from
Oct 19, 2025
Merged

build: build v8 with -fvisibility=hidden -fvisibility-inlines-hidden #56290

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13 changes: 13 additions & 0 deletions node.gyp
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Original file line number Diff line number Diff line change
Expand Up @@ -491,6 +491,19 @@
['clang==0 and OS!="win"', {
'cflags': [ '-Wno-restrict', ],
}],
# TODO(joyeecheung): investigate if it breaks addons.
# ['OS=="mac"', {
# 'xcode_settings': {
# 'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES', # -fvisibility=hidden
# 'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES' # -fvisibility-inlines-hidden
# },
# }],
# ['OS!="win" or clang==1', {
# 'cflags': [
# '-fvisibility=hidden',
# '-fvisibility-inlines-hidden'
# ],
# }],
# Pointer authentication for ARM64.
['target_arch=="arm64"', {
'target_conditions': [
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25 changes: 17 additions & 8 deletions tools/v8_gypfiles/v8.gyp
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Expand Up @@ -46,22 +46,31 @@
}
},
'conditions': [
['OS=="mac"', {
# Hide symbols that are not explicitly exported with V8_EXPORT.
# TODO(joyeecheung): enable it on other platforms. Currently gcc times out
# or run out of memory with -fvisibility=hidden on some machines in the CI.
'xcode_settings': {
'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES', # -fvisibility=hidden
},
# Build with -fvisibility=hidden and -fvisibility-inlines-hidden to avoid
# including unnecessary internal symbols, which may lead to run-time fixups.
# This is not done on AIX where symbols are exported by tools/create_expfile.sh
# see https://github.com/nodejs/node/pull/56290#issuecomment-2582703109
['OS!="aix"', {
'defines': [
'BUILDING_V8_SHARED', # Make V8_EXPORT visible.
],
]
}],
['node_shared=="true"', {
'defines': [
'V8_TLS_USED_IN_LIBRARY', # Enable V8_TLS_LIBRARY_MODE.
],
}],
['OS=="mac"', {
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Can this be moved up above the V8_TLS_USED_IN_LIBRARY? So that this can be closer to the comments above, which is less relevant with V8_TLS_USED_IN_LIBRARY.

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Would you mind if I leave it to a follow-up PR? Trying to get the cache of it into the CI first instead of retrying for flakes and make the cache a mess in the CI...

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Merged it to put the cache in, feel free to open another PR to move them closer

'xcode_settings': {
'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES', # -fvisibility=hidden
'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES' # -fvisibility-inlines-hidden
},
}, 'OS!="aix" and (OS!="win" or clang==1)', {
'cflags': [
'-fvisibility=hidden',
'-fvisibility-inlines-hidden'
],
}], # MSVC hides the non-public symbols by default so no need to configure it.
],
},
'targets': [
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