Re: Xcode2.2 and gcc-3.3 "multiple compilations" error

• Subject: Re: Xcode2.2 and gcc-3.3 "multiple compilations" error
• From: Nick Dowell <email@hidden>
• Date: Fri, 18 Nov 2005 11:11:26 +0000
• Delivered-to: email@hidden
• Delivered-to: email@hidden

I found the problem!

Thanks for your help,
Nick

On 17 Nov 2005, at 18:17, Chris Espinosa wrote:

On Nov 17, 2005, at 7:54 AM, Nick Dowell wrote:

On 17 Nov 2005, at 15:48, Chris Espinosa wrote:

On Nov 17, 2005, at 7:37 AM, Nick Dowell wrote:

I've been trying to build a c++ Xcode 2.2 project under gcc 3.3 in order to ship a c++ based solution to customers running MacOS versions prior to 10.3.9.

The project builds fine with gcc 4, but now I always get this error:

"gcc-3.3: cannot specify -o with -c or -S and multiple compilations"

The strange this is, I can build some projects with gcc 3.3 (using the GCC_VERSION build setting) but not wxWidgets (which other projects depend on). And even projects which work have both "-o" and "-c" as options to gcc, so the error message seems very misleading.

Please post the compiler invocation line from the build transcript for the file that generates this error. There's no way to tell what's happening without seeing the input parameters to the compiler.

Here's the offending invocation:

cd /Users/nick/Documents/trunk/lib/wxWidgets-2.6/src
setenv MACOSX_DEPLOYMENT_TARGET 10.3
setenv NEXT_ROOT /Developer/SDKs/MacOSX10.3.9.sdk
/usr/bin/gcc-3.3 -x c++ -arch ppc -pipe -Wno-trigraphs - fpascal-strings -fasm-blocks -Os -Wswitch -Wuninitialized - DNO_GCC_PRAGMA -D__WXMAC__ -DwxUSE_BASE=1 -D_FILE_OFFSET_BITS=64 - D_LARGE_FILES -D__WXMAC_XCODE__=1 -DWX_PRECOMP=1 -DMACOS_CLASSIC - fmessage-length=0 -mtune=G4 -Wno-invalid-offsetof -Wmost -Wno-four- char-constants -Wno-unknown-pragmas -F/Users/nick/Documents/trunk/ lib/wxWidgets-2.6/src/build/Deployment -I/Users/nick/Documents/ trunk/lib/wxWidgets-2.6/src/build/Deployment/include -I/Users/nick/ Documents/trunk/lib/wxWidgets-2.6/src/build/include -I../include - Imac/carbon/morefilex -Icommon -Ijpeg -Ipng -Iregex -Iexpat/lib - Itiff -I- -I/Developer/SDKs/MacOSX10.3.9.sdk/Developer/Headers/ FlatCarbon -I/Developer/SDKs/MacOSX10.3.9.sdk/usr/include -I/Users/ nick/Documents/trunk/lib/wxWidgets-2.6/src/build/wxWindows.build/ Deployment/static.build/DerivedSources - DMAC_OS_X_VERSION_MIN_REQUIRED=1030 -fconstant-cfstrings - D__CONSTANT_CFSTRINGS__ -iquote /Users/nick/Documents/trunk/lib/ wxWidgets-2.6/src/build/include -iquote ../include -iquote mac/ carbon/morefilex -iquote common -iquote jpeg -iquote png -iquote regex -iquote expat/lib -iquote tiff -isystem /Developer/SDKs/ MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3 -I/Developer/SDKs/ MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++ -I/Developer/SDKs/ MacOSX10.3.9.sdk/usr/include/gcc/darwin/3.3/c++/ppc-darwin - isystem /Developer/SDKs/MacOSX10.3.9.sdk/usr/include -include / Users/nick/Documents/trunk/lib/wxWidgets-2.6/src/../include/wx/ wxprec.h -c /Users/nick/Documents/trunk/lib/wxWidgets-2.6/src/ common/file.cpp -o /Users/nick/Documents/trunk/lib/wxWidgets-2.6/ src/build/wxWindows.build/Deployment/static.build/Objects-normal/ ppc/file.o
gcc-3.3: cannot specify -o with -c or -S and multiple compilations

Are you sure the wxprec.h file is a precompiled header? If it's not, and it contains more than just definitions (e.g. it contains code that must be compiled), gcc will think you're compiling two sources: wxprec.h and file.cpp. That's what it means by "multiple compilations."

Chris

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