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bug#41470: Libtool "func_convert_core_msys_to_w32" Hang

From: 阿布
Subject: bug#41470: Libtool "func_convert_core_msys_to_w32" Hang
Date: Sat, 23 May 2020 13:20:53 +1000


I might have found a (tiny) bug when using libtool (packaged along with another project, libffi) under Cygwin on Windows 10 (64-bit) and mingw64 to compile the project: when the command 

    ./libtool -v --tag=CC   --mode=link x86_64-w64-mingw32-gcc  -O3 -fomit-frame-pointer -fstrict-aliasing -ffast-math -W
all -fexceptions   -o libffi_convenience.la  src/prep_cif.lo src/types.lo src/raw_api.lo src/java_raw_api.lo src/closur
es.lo   src/x86/ffiw64.lo src/x86/win64.lo

was executed by 'make', the process hangs. After it was re-executed in debug mode, I found out that the command which caused it to hang was
    sed -e 's/[ ]*$//' -e 's|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g'
which is in line 964 of build-aux/ltmain.in: instead of having cmd.exe to exit after the command was executed (the '/c' argument), it remains open and waiting for the user's input due to the unrecognized argument '//c'. The problem was fixed after I changed line 963 to
    func_convert_core_msys_to_w32_result=`( cmd /c echo "$1" ) 2>/dev/null |
Perhaps you would want to consider fixing the problem?

Hongtian Yu

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