Re: GCC 4.3.0 i386-pc-mingw32 ALPHA Release

Aaron W. LaFramboise wrote:
> OK, I'll admit I didn't pay close enough addition to that discussion,
> but I don't really understand this bug.

Sorry, I had assumed you followed it. Basically, this bug only manifests
itself when the MinGW/GCC bin directory is *not* present in PATH -- e.g. GCC
is run with a fully-qualified command line, like
"C:\path\to\mingw\bin\gcc.exe -o myprogram mysources". It is in fact highly
useful to be able to run GCC on Windows without any additions to PATH,
particularly when working with multiple versions of it or when running it
from an IDE.

The GCC drivers (gcc.exe and friends, as well as collect2) actually search
for their subprograms ("cc1", "as" and "ld" via collect2 in a typical C
compilation) in a predefined set of locations which you can view by running
"gcc.exe -print-search-dirs". Only if the subprogram is not found in any of
those locations does it fall back on an unqualified invocation. You will see
this when you compare the verbose output of a previous GCC release with your
new one: in 3.4.5, the invocation of "as" is fully qualified; in the alpha
4.3.0, it is unqualified (and therefore fails if the directory containing it
isn't in PATH). Below is an abridged transcription of a Windows shell
session which demonstrates this:

D:\JDevel\test> D:\JDevel\MinGW\mingw-gcc-3.4.5\bin\gcc.exe -v -o test.exe
main.c

Reading specs from
D:/JDevel/MinGW/mingw-gcc-3.4.5/bin/../lib/gcc/mingw32/3.4.5/
specs
Configured with:
../gcc-3.4.5/configure --with-gcc --with-gnu-ld --with-gnu-as -
-host=mingw32 --target=mingw32 --prefix=/mingw --enable-threads --disable-nls
 --
enable-languages=c,c++,f77,ada,objc,java --disable-win32-registry --disable-shar
ed --enable-sjlj-exceptions --enable-libgcj --disable-java-awt --without-x --ena
ble-java-gc=boehm --disable-libgcj-debug --enable-interpreter --enable-hash-sync
hronization --enable-libstdcxx-debug
Thread model: win32
gcc version 3.4.5 (mingw-vista special r2)
<***cc1 invocation snipped***>
 D:/JDevel/MinGW/mingw-gcc-3.4.5/bin/../lib/gcc/mingw32/3.4.5/../../../../mingw32/bin/as.exe -o D:\DOCUME~1\John\LOCALS~1\Temp/ccqP4ilE.oD:\DOCUME~1\John\LOCALS~1\Temp/ccxWAvll.s<***collect2 invocation snipped***>D:\JDevel\test> D:\JDevel\MinGW\mingw-gcc-4.3.0\bin\gcc.exe -v -o test.exemain.cUsing built-in specs.Target: i386-pc-mingw32Configured with:../gcc-4.3.0/configure --prefix=/mingw --disable-nls --enable-languages=c,c++,fortran,objc,obj-c++,ada,java --disable-win32-registry --disable-sjlj-exceptions --enable-libstdcxx-debug --enable-version-specific-runtime-libs--with-gmp=/mingw/src/gcc/gmp-mpfr-root --with-mpfr=/mingw/src/gcc/gmp-mpfr-root --enable-libgcj --enable-concept-checks --enable-sharedThread model: win32gcc version 4.3.0 (GCC)<*** cc1 invocation snipped***>COLLECT_GCC_OPTIONS='-v' '-o' 'test.exe' '-mtune=i386' as -o D:\DOCUME~1\John\LOCALS~1\Temp/cc2779xd.oD:\DOCUME~1\John\LOCALS~1\Temp/ccqhufMa.sgcc.exe: CreateProcess: No such file or directoryFinally, strai
 ght from the horse's mouth:http://www.nabble.com/Re%3A-Necessary-environment-path-settings--p16243810.html.Cheers,John E.

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