wrapper libtool échoue silencieusement sur MSYS2

Question

Un script qui reproduit le problème:

#!/bin/bash 
set -ex 
rm -rf /tmp/x 
cd /tmp 
mkdir x 
cd x 
mkdir lib 
cat > lib/f.c << EOF 
#include <stdio.h> 
void f(void){puts("hello");} 
EOF 
mkdir exe 
cat > exe/main.c << EOF 
void f(void); 
int main(){f();} 
EOF 
( 
    cd lib 
    libtool c --tag=CC gcc -c f.c 
    libtool l --tag=CC gcc -rpath /usr/local/lib -no-undefined -o libf.la f.lo 
) 
(
    cd exe 
    libtool c --tag=CC gcc -c main.c 
    libtool l --tag=CC gcc -o main main.lo ../lib/libf.la 
) 
exe/main.exe 
exe/main.exe --lt-debug 
exe/.libs/main.exe || echo failed 
export PATH="/tmp/x/lib/.libs:$PATH" 
exe/main.exe 
exe/main.exe --lt-debug 
exe/.libs/main.exe || echo failed 

Sortie:

+ rm -rf /tmp/x 
+ cd /tmp 
+ mkdir x 
+ cd x 
+ mkdir lib 
+ cat 
+ mkdir exe 
+ cat 
+ cd lib 
+ libtool c --tag=CC gcc -c f.c 
libtool: compile: gcc -c f.c -DDLL_EXPORT -DPIC -o .libs/f.o 
libtool: compile: gcc -c f.c -o f.o >/dev/null 2>&1 
+ libtool l --tag=CC gcc -rpath /usr/local/lib -no-undefined -o libf.la f.lo 
libtool: link: gcc -shared .libs/f.o  -o .libs/msys-f-0.dll -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker .libs/libf.dll.a 
libtool: link: ar cru .libs/libf.a f.o 
libtool: link: ranlib .libs/libf.a 
libtool: link: (cd ".libs" && rm -f "libf.la" && cp -pR "../libf.la" "libf.la") 
+ cd exe 
+ libtool c --tag=CC gcc -c main.c 
libtool: compile: gcc -c main.c -DDLL_EXPORT -DPIC -o .libs/main.o 
libtool: compile: gcc -c main.c -o main.o >/dev/null 2>&1 
+ libtool l --tag=CC gcc -o main main.lo ../lib/libf.la 
libtool: link: gcc -o .libs/main .libs/main.o ../lib/.libs/libf.dll.a -L/usr/local/lib 
+ exe/main.exe 
+ exe/main.exe --lt-debug 
main.exe:./.libs/lt-main.c:231: libtool wrapper (GNU libtool) 2.4.6 
main.exe:./.libs/lt-main.c:232: (main) argv[0]: C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:233: (main) program_name: main.exe 
main.exe:./.libs/lt-main.c:394: (find_executable): C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:349: (check_executable): C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:238: (main) found exe (before symlink chase) at: C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:243: (main) found exe (after symlink chase) at: C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:266: (main) libtool target name: main.exe 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'BIN_SH' to 'xpg4' 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'DUALCASE' to '1' 
main.exe:./.libs/lt-main.c:667: (lt_update_exe_path) modifying 'PATH' by prepending '/tmp/x/lib/.libs:/usr/local/lib:/usr/local/bin:' 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'PATH' to '/tmp/x/lib/.libs:/usr/local/lib:/usr/local/bin:C:\msys64\mingw64\bin;C:\msys64\usr\local\bin;C:\msys64\usr\bin;C:\msys64\usr\bin;C:\Windows\System32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\msys64\usr\bin\site_perl;C:\msys64\usr\bin\vendor_perl;C:\msys64\usr\bin\core_perl' 
main.exe:./.libs/lt-main.c:688: (lt_update_lib_path) modifying 'PATH' by prepending '/tmp/x/lib/.libs:' 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'PATH' to '/tmp/x/lib/.libs:/tmp/x/lib/.libs:/usr/local/lib:/usr/local/bin:C:\msys64\mingw64\bin;C:\msys64\usr\local\bin;C:\msys64\usr\bin;C:\msys64\usr\bin;C:\Windows\System32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\msys64\usr\bin\site_perl;C:\msys64\usr\bin\vendor_perl;C:\msys64\usr\bin\core_perl' 
main.exe:./.libs/lt-main.c:298: (main) lt_argv_zero: C:\msys64\tmp\x\exe\.libs/main.exe 
main.exe:./.libs/lt-main.c:302: (main) newargz[0]: C:\msys64\tmp\x\exe\.libs/main.exe 
+ exe/.libs/main.exe 
C:/msys64/tmp/x/exe/.libs/main.exe: error while loading shared libraries: msys-f-0.dll: cannot open shared object file: No such file or directory 
+ echo failed 
failed 
+ export PATH=/tmp/x/lib/.libs:/mingw64/bin:/usr/local/bin:/usr/bin:/bin:/c/Windows/System32:/c/Windows:/c/Windows/System32/Wbem:/c/Windows/System32/WindowsPowerShell/v1.0/:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl 
+ PATH=/tmp/x/lib/.libs:/mingw64/bin:/usr/local/bin:/usr/bin:/bin:/c/Windows/System32:/c/Windows:/c/Windows/System32/Wbem:/c/Windows/System32/WindowsPowerShell/v1.0/:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl 
+ exe/main.exe 
+ exe/main.exe --lt-debug 
main.exe:./.libs/lt-main.c:231: libtool wrapper (GNU libtool) 2.4.6 
main.exe:./.libs/lt-main.c:232: (main) argv[0]: C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:233: (main) program_name: main.exe 
main.exe:./.libs/lt-main.c:394: (find_executable): C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:349: (check_executable): C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:238: (main) found exe (before symlink chase) at: C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:243: (main) found exe (after symlink chase) at: C:\msys64\tmp\x\exe\main.exe 
main.exe:./.libs/lt-main.c:266: (main) libtool target name: main.exe 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'BIN_SH' to 'xpg4' 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'DUALCASE' to '1' 
main.exe:./.libs/lt-main.c:667: (lt_update_exe_path) modifying 'PATH' by prepending '/tmp/x/lib/.libs:/usr/local/lib:/usr/local/bin:' 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'PATH' to '/tmp/x/lib/.libs:/usr/local/lib:/usr/local/bin:C:\msys64\tmp\x\lib\.libs;C:\msys64\mingw64\bin;C:\msys64\usr\local\bin;C:\msys64\usr\bin;C:\msys64\usr\bin;C:\Windows\System32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\msys64\usr\bin\site_perl;C:\msys64\usr\bin\vendor_perl;C:\msys64\usr\bin\core_perl' 
main.exe:./.libs/lt-main.c:688: (lt_update_lib_path) modifying 'PATH' by prepending '/tmp/x/lib/.libs:' 
main.exe:./.libs/lt-main.c:617: (lt_setenv) setting 'PATH' to '/tmp/x/lib/.libs:/tmp/x/lib/.libs:/usr/local/lib:/usr/local/bin:C:\msys64\tmp\x\lib\.libs;C:\msys64\mingw64\bin;C:\msys64\usr\local\bin;C:\msys64\usr\bin;C:\msys64\usr\bin;C:\Windows\System32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\msys64\usr\bin\site_perl;C:\msys64\usr\bin\vendor_perl;C:\msys64\usr\bin\core_perl' 
main.exe:./.libs/lt-main.c:298: (main) lt_argv_zero: C:\msys64\tmp\x\exe\.libs/main.exe 
main.exe:./.libs/lt-main.c:302: (main) newargz[0]: C:\msys64\tmp\x\exe\.libs/main.exe 
+ exe/.libs/main.exe 
hello 

QU'OBSERVER: L'emballage en exe/main.exe jamais correctement exécute. Il ne renvoie pas non plus d'erreur (notez que nous avons set -e). Il échoue toujours silencieusement, sans imprimer "hello". Le véritable exécutable dans exe/.libs/main.exe signale une DLL manquante comme prévu. Si j'ajoute manuellement le chemin d'accès à cette DLL (/tmp/x/lib/.libs) à la variable d'environnement PATH, le vrai exécutable fonctionne, mais le wrapper échoue toujours silencieusement.

Notez qu'à partir de la sortie --lt-debug, l'encapsuleur semble faire la bonne chose, en ajoutant le bon répertoire à PATH.

gcc -v:

Using built-in specs. 
    COLLECT_GCC=C:\msys64\mingw64\bin\gcc.exe 
    COLLECT_LTO_WRAPPER=C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/lto-wrapper.exe 
    Target: x86_64-w64-mingw32 
    Configured with: ../gcc-6.3.0/configure --prefix=/mingw64 --with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include --libexecdir=/mingw64/lib --enable-bootstrap --with-arch=x86-64 --with-tune=generic --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-time=yes --disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check --enable-lto --enable-libgomp --disable-multilib --enable-checking=release --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64 --with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64 --with-pkgversion='Rev3, Built by MSYS2 project' --with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as --with-gnu-ld 
    Thread model: posix 
    gcc version 6.3.0 (Rev3, Built by MSYS2 project) 

libtool -v:

libtool (GNU libtool) 2.4.6 
    Written by Gordon Matzigkeit, 1996 

    Copyright (C) 2014 Free Software Foundation, Inc. 
    This is free software; see the source for copying conditions. There is NO 
    warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 

Answer 1

j'utilisais le MinGW-w64 Win64 Shell mais j'utilisais le mauvais libtool. Faire

pacman -R libtool 
pacman -S mingw64/mingw-w64-x86_64-libtool 

résout le problème.

Le package libtool du package libtool cible MSYS2 lui-même et est probablement la bonne chose à utiliser dans le MSYS2 Shell.