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https://github.com/status-im/status-app.git
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81 lines
3.3 KiB
Bash
81 lines
3.3 KiB
Bash
#!/usr/bin/env bash
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# Generate an MSVC import library (.lib) for a DLL from its C header.
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#
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# The Windows build links the nim client with clang/lld-link (MSVC ABI) so it can
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# use Qt's msvc2022_64 build. Unlike mingw's `ld`, lld-link cannot link against a
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# .dll directly — it needs an import library. The project's Go/Nim c-shared DLLs
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# (libstatus, libkeycard, libsds) ship only a .dll + .h, so we synthesize the
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# import lib here: extract the exported symbols from the header (cleaner than the
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# DLL's raw export table, which re-exports unrelated Windows API names) and feed
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# them to llvm-dlltool.
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#
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# Usage: gen-import-lib.sh <header> <dll-file-name> <output.lib>
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# <header> path to the c-shared header (… __declspec(dllexport) decls)
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# <dll-file-name> the DLL's on-disk name, e.g. libstatus.dll (recorded in the
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# import lib so the loader finds the right DLL at runtime)
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# <output.lib> path of the import library to create
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set -eu
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header="$1"
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dll_name="$2"
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out_lib="$3"
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if [ ! -f "$header" ]; then
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echo "gen-import-lib: header not found: $header" >&2
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exit 1
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fi
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def_file="${out_lib%.lib}.def"
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# Pull the exported function names out of the header. Two header styles:
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# * Go c-shared: extern __declspec(dllexport) char* SomeFunc(char* x);
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# * Nim c-shared (plain): void* SomeFunc(SomeCb cb, void* userData);
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# In both cases capture the identifier immediately before the '(' that follows
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# the return type. For the plain style, skip typedefs/comments/preprocessor and
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# function-pointer typedefs so we only pick up real exported functions.
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if grep -q "__declspec(dllexport)" "$header"; then
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names=$(sed -nE 's/.*__declspec\(dllexport\)[[:space:]]+[A-Za-z_][A-Za-z0-9_[:space:]\*]*[[:space:]\*]([A-Za-z_][A-Za-z0-9_]*)[[:space:]]*\(.*/\1/p' "$header" | sort -u)
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else
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names=$(grep -vE '^[[:space:]]*(typedef|//|/\*|\*|#|extern[[:space:]]+"C")' "$header" \
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| sed -nE 's/^[[:space:]]*[A-Za-z_][A-Za-z0-9_[:space:]\*]*[[:space:]\*]([A-Za-z_][A-Za-z0-9_]*)[[:space:]]*\(.*/\1/p' | sort -u)
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fi
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if [ -z "$names" ]; then
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echo "gen-import-lib: no __declspec(dllexport) symbols found in $header" >&2
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exit 1
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fi
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{
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echo "LIBRARY $dll_name"
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echo "EXPORTS"
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echo "$names"
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} > "$def_file"
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# Resolve llvm-dlltool. The compiler is invoked via its absolute path
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# (CLANGWRAP_CLANG), so the LLVM bin isn't necessarily on PATH here. Fall back to
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# asking clang for its toolchain bin (works even when clang is a shim).
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dlltool=""
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if command -v llvm-dlltool >/dev/null 2>&1; then
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dlltool="llvm-dlltool"
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else
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clang="${CLANGWRAP_CLANG:-}"
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if [ -z "$clang" ] || [ ! -e "$clang" ]; then
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clang="$(command -v clang 2>/dev/null || true)"
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fi
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if [ -n "$clang" ]; then
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progdir="$("$clang" -print-search-dirs 2>/dev/null | sed -n 's/^programs: =//p' | tr ';' '\n' | head -1 | tr '\\' '/')"
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for cand in "$progdir/llvm-dlltool.exe" "$progdir/llvm-dlltool" \
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"$(dirname "$clang")/llvm-dlltool.exe" "$(dirname "$clang")/llvm-dlltool"; do
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if [ -n "$cand" ] && [ -e "$cand" ]; then dlltool="$cand"; break; fi
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done
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fi
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fi
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if [ -z "$dlltool" ]; then
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echo "gen-import-lib: llvm-dlltool not found (not on PATH and not next to clang)" >&2
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exit 1
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fi
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# i386:x86-64 == x64.
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"$dlltool" -m i386:x86-64 -d "$def_file" -D "$dll_name" -l "$out_lib"
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echo "gen-import-lib: wrote $out_lib ($(printf '%s\n' "$names" | wc -l) symbols) for $dll_name"
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