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Date:	Fri, 20 Jan 2012 18:16:32 -0800 (PST)
From:	Ilguiz Latypov <ilgiz AT rogers DOT com>
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Subject:	Re: hard-coded library search path in gcc-4
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>>  $ ( export PATH= ; /cygdrive/c/cygwin/bin/gcc-4.exe -v -E - < /dev/null )

I figured that cc1 depends on /usr/bin.  A user invoking cc1 directly could figure the missing dependency.  Invoking cc1 indirectly from /usr/bin/gcc-4 without /usr/bin in PATH will break cc1 against expectation of /usr/bin/gcc-4 passing its containing directory to cc1 as a library search directory.

> $ cygcheck /usr/lib/gcc/i686-pc-cygwin/4.5.3/cc1.exe
> C:\cygwin\lib\gcc\i686-pc-cygwin\4.5.3\cc1.exe
>   C:\cygwin\bin\cygcloog-0.dll
>     C:\cygwin\bin\cyggcc_s-1.dll
>       C:\cygwin\bin\cygwin1.dll
>         C:\WINDOWS\system32\ADVAPI32.DLL
>           C:\WINDOWS\system32\KERNEL32.dll
>             C:\WINDOWS\system32\ntdll.dll
>           C:\WINDOWS\system32\RPCRT4.dll
>             C:\WINDOWS\system32\Secur32.dll
>     C:\cygwin\bin\cyggmp-3.dll
>     C:\cygwin\bin\cygppl_c-2.dll
>       C:\cygwin\bin\cygppl-7.dll
>         C:\cygwin\bin\cygstdc++-6.dll
>         C:\cygwin\bin\cyggmpxx-4.dll
>   C:\cygwin\bin\cygiconv-2.dll
>   C:\cygwin\bin\cygintl-8.dll
>   C:\cygwin\bin\cygmpc-1.dll
>     C:\cygwin\bin\cygmpfr-1.dll
>   C:\cygwin\bin\cygmpfr-4.dll
>   C:\cygwin\bin\cygz.dll
> 


> $ PATH= /usr/bin/cygcheck /usr/lib/gcc/i686-pc-cygwin/4.5.3/cc1.exe
> C:\cygwin\lib\gcc\i686-pc-cygwin\4.5.3\cc1.exe
>   C:\WINDOWS\system32\KERNEL32.dll
>     C:\WINDOWS\system32\ntdll.dll
> cygcheck: WARNING: PATH is not set
> 
> cygcheck: track_down: could not find cygcloog-0.dll
> 
> cygcheck: track_down: could not find cygwin1.dll
> 
> cygcheck: track_down: could not find cyggmp-3.dll
> 
> cygcheck: track_down: could not find cygiconv-2.dll
> 
> cygcheck: track_down: could not find cygintl-8.dll
> 
> cygcheck: track_down: could not find cygmpc-1.dll
> 
> cygcheck: track_down: could not find cygmpfr-4.dll
> 
> cygcheck: track_down: could not find cygppl_c-2.dll
> 
> cygcheck: track_down: could not find cygz.dll
> 

Cheers.

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