[Webkit-unassigned] [Bug 230061] New: GCC_OFFLINEASM_SOURCE_MAP fails to build when LTO is enabled

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230061

            Bug ID: 230061
           Summary: GCC_OFFLINEASM_SOURCE_MAP fails to build when LTO is
                    enabled
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at gnome.org

With:

-DCMAKE_C_FLAGS="-flto=auto" -DCMAKE_CXX_FLAGS="-flto=auto" -DGCC_OFFLINEASM_SOURCE_MAP=ON

gcc-11.2.1-1.fc34, and cmake-3.20.5-1.fc34, JavaScriptCore fails to link successfully. 

The full error message is:

/tmp/cchYjCtn.s: Assembler messages:
/tmp/cchYjCtn.s:23: Error: file table slot 1 is already occupied by a different file (../../Source/JavaScriptCore/llint/LowLevelInterpreter.cpp vs /home/mcatanzaro/Projects/WebKit/Source/JavaScriptCore/llint/LowLevelInterpreter.asm)
/tmp/cchYjCtn.s:103670: Error: file table slot 2 is already occupied by a different file (/home/mcatanzaro/Projects/WebKit/WebKitBuild/GNOME/JavaScriptCore/DerivedSources/InitBytecodes.asm vs ../../Source/JavaScriptCore/heap/SlotVisitorInlines.h)
/tmp/cchYjCtn.s:103689: Error: file table slot 3 is already occupied by a different file (/home/mcatanzaro/Projects/WebKit/Source/JavaScriptCore/llint/LowLevelInterpreter64.asm vs WTF/Headers/wtf/Atomics.h)
/tmp/cchYjCtn.s:103697: Error: file table slot 4 is already occupied by a different file (/home/mcatanzaro/Projects/WebKit/Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm vs ../../Source/JavaScriptCore/heap/HeapCellInlines.h)
/tmp/cchYjCtn.s:103702: Error: file table slot 5 is already occupied by a different file (/home/mcatanzaro/Projects/WebKit/WebKitBuild/GNOME/JavaScriptCore/DerivedSources/InitWasm.asm vs ../../Source/JavaScriptCore/heap/PreciseAllocation.h)
/tmp/cchYjCtn.s:103728: Error: file table slot 6 is already occupied by a different file (/home/mcatanzaro/Projects/WebKit/Source/JavaScriptCore/llint/WebAssembly.asm vs ../../Source/JavaScriptCore/heap/MarkedBlock.h)
make: *** [/tmp/ccrXP4o0.mk:2: /tmp/cctehSRQ.ltrans0.ltrans.o] Error 1
make: *** Waiting for unfinished jobs....
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/bin/ld.gold: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Notice this occurs when called by lto-wrapper. The build works fine when LTO is disabled.

In case it matters (unlikely), my full CMake command line is:

jhbulid run cmake -DCMAKE_C_FLAGS="-flto=auto" -DCMAKE_CXX_FLAGS="-flto=auto" -DCMAKE_BUILD_TYPE=RelWithDebInfo -DPORT=GTK -DDEVELOPER_MODE=ON -DGCC_OFFLINEASM_SOURCE_MAP=ON -DCMAKE_INSTALL_PREFIX=$HOME/Projects/GNOME/install/ -DCMAKE_INSTALL_LIBDIR=lib -GNinja

When this bug is fixed, please also reenable the GCC_OFFLINEASM_SOURCE_MAP feature by reverting the patch in bug #229893!

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