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fix(ios): localize Nim runtime symbols in libsds static library (#84)

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* fix(ios): localize Nim runtime symbols in libsds static library

Replace libtool -exported_symbols_list (ignored for static archives on
current Xcode, with a silent fallback to unlocalized objects) with
ld -r -exported_symbol '_Sds*', so libsds.a no longer exports global
Nim runtime symbols that collide with libnim_status_client.
This commit is contained in:
Andrey Bocharnikov 2026-07-02 18:28:44 +04:00 committed by GitHub
parent b12f5ee07c
commit 884ce6f02b
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1 changed files with 11 additions and 12 deletions
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@ -153,7 +153,6 @@ proc buildMobileIOS(srcDir = ".", sdkPath = "") =
quit "Error: Xcode/iOS SDK not found"
let aFile = outDir & "/libsds.a"
let aFileTmp = outDir & "/libsds_tmp.a"
let cpu = getMyCpu()
let clangArch = if cpu == "amd64": "x86_64" else: cpu
@ -186,17 +185,17 @@ proc buildMobileIOS(srcDir = ".", sdkPath = "") =
exec "clang " & clangFlags & " -c " & cFile & " -o " & oFile
objectFiles.add(oFile)
# 3) Create static library from all object files
exec "ar rcs " & aFileTmp & " " & objectFiles.join(" ")
# 4) Use libtool to localize all non-public symbols
# Keep only Sds* functions as global, hide everything else to prevent conflicts
# with nim runtime symbols from libnim_status_client
let keepSymbols =
"_Sds*:_libsdsNimMain:_libsdsDatInit*:_libsdsInit*:_NimMainModule__libsds*"
exec "xcrun libtool -static -o " & aFile & " " & aFileTmp &
" -exported_symbols_list /dev/stdin <<< '" & keepSymbols & "' 2>/dev/null || cp " &
aFileTmp & " " & aFile
# 3) Merge into one object exporting only the _Sds* API, so libsds's Nim runtime
# can't clash with other static Nim libs (e.g. libnim_status_client).
# (libtool -static ignores -exported_symbols_list on current Xcode; ld -r works.
# Objects go through a response file: too many long paths for one command line.)
let objListFile = outDir & "/objects.txt"
writeFile(objListFile, objectFiles.join("\n"))
let mergedObj = outDir & "/libsds_merged.o"
exec "xcrun ld -r -arch " & clangArch & " -exported_symbol '_Sds*' -o " & mergedObj &
" -filelist " & objListFile
exec "ar rcs " & aFile & " " & mergedObj
exec "rm -f " & mergedObj & " " & objListFile
echo "✔ iOS library created: " & aFile