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Date:	Thu, 19 Jan 2012 20:07:42 -0800 (PST)
From:	Ilguiz Latypov <ilgiz AT rogers DOT com>
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Subject:	hard-coded library search path in gcc-4
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I found that gcc-4 from a recent setup.exe could not start cc1 because the latter could not find some shared object file.

I confirmed that by running cc1 alone with an empty PATH variable.


> $ ( export PATH= ; /cygdrive/c/cygwin/bin/gcc-4.exe -v -E - < /dev/null )
> Using built-in specs.
> COLLECT_GCC=/cygdrive/c/cygwin/bin/gcc-4
> COLLECT_LTO_WRAPPER=/cygdrive/c/cygwin/bin/../lib/gcc/i686-pc-cygwin/4.5.3/lto-wrapper.exe
> Target: i686-pc-cygwin
> Configured with: /gnu/gcc/releases/respins/4.5.3-3/gcc4-4.5.3-3/src/gcc-4.5.3/configure --srcdir=/gnu/gcc/releases/respins/4.5.3-3/gcc4-4.5.3-3/src/gcc-4.5.3 --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/lib --datadir=/usr/share --localstatedir=/var --sysconfdir=/etc --datarootdir=/usr/share --docdir=/usr/share/doc/gcc4 -C --datadir=/usr/share --infodir=/usr/share/info --mandir=/usr/share/man -v --with-gmp=/usr --with-mpfr=/usr --enable-bootstrap --enable-version-specific-runtime-libs --libexecdir=/usr/lib --enable-static --enable-shared --enable-shared-libgcc --disable-__cxa_atexit --with-gnu-ld --with-gnu-as --with-dwarf2 --disable-sjlj-exceptions --enable-languages=ada,c,c++,fortran,java,lto,objc,obj-c++ --enable-graphite --enable-lto --enable-java-awt=gtk --disable-symvers --enable-libjava --program-suffix=-4 --enable-libgomp --enable-libssp --enable-libada --enable-threads=posix --with-arch=i686
 --with-tune=generic --enable-libgcj-sublibs CC=gcc-4 CXX=g++-4 CC_FOR_TARGET=gcc-4 CXX_FOR_TARGET=g++-4 GNATMAKE_FOR_TARGET=gnatmake GNATBIND_FOR_TARGET=gnatbind --with-ecj-jar=/usr/share/java/ecj.jar
> Thread model: posix
> gcc version 4.5.3 (GCC)
> COLLECT_GCC_OPTIONS='-v' '-E' '-mtune=generic' '-march=i686'
>  /cygdrive/c/cygwin/bin/../lib/gcc/i686-pc-cygwin/4.5.3/cc1.exe -E -quiet -v -iprefix /cygdrive/c/cygwin/bin/../lib/gcc/i686-pc-cygwin/4.5.3/ -D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix -idirafter /usr/lib/../include/w32api -idirafter ../../include/w32api - -mtune=generic -march=i686
> /usr/lib/gcc/i686-pc-cygwin/4.5.3/cc1.exe: error while loading shared libraries: ?: cannot open shared object file: No such file or directory
> 
> $ /usr/lib/gcc/i686-pc-cygwin/4.5.3/cc1.exe -o /dev/null - < /dev/null
> 
> Analyzing compilation unit
> Performing interprocedural optimizations
>  <*free_lang_data> <visibility> <early_local_cleanups> <whole-program> <inline>Assembling functions:
> 
> Execution times (seconds)
>  TOTAL                 :   0.00             0.00             0.01                590 kB
> 
> $ PATH= /usr/lib/gcc/i686-pc-cygwin/4.5.3/cc1.exe -o /dev/null - < /dev/null
> /usr/lib/gcc/i686-pc-cygwin/4.5.3/cc1.exe: error while loading shared libraries: ?: cannot open shared object file: No such file or directory

Cheers!

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