Re: preprocessor/2948

[Neil Booth <neil@daikokuya.demon.co.uk>]

The following reply was made to PR preprocessor/2948; it has been noted by GNATS.

From: Neil Booth <neil@daikokuya.demon.co.uk>
To: Sean McNeil <sean@mcneil.com>
Cc: nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Subject: Re: preprocessor/2948
Date: Mon, 28 May 2001 23:24:46 +0100

 Hi Sean,
 
 The command lines look identical in their effects to me.  I honestly
 have no idea what is going wrong.  I'll leave your bug report open, of
 course.
 
 If you could narrow it down by removing code and / or command line
 options until the difference in behaviour vanishes, it would help a
 lot.  Otherwise this kind of thing, by its very nature, is hard to
 get a grip on.
 
 Neil.
 
 Sean McNeil wrote:-
 
 > Here is the information you requested.
 
 >  I've also tried running the code through with the -E option twice
 > to see if the cpp is changing the code in any way in the second
 > pass-through.  The only difference was in some white space and diff
 > -cb shows no differences.  I was under the impression that the cpp
 > is now a library invoked directly from the different modules
 > (C,C++,etc.).  Could it be that the format/switches used between how
 > the cpp is invoked with the -E option and without it are different?
 > The -v option indicates that cpp0 is not called so it must now get
 > used by cc1plus directly.
 >
 > [root@blue libstdcxx]# arm-wrs-vxworks-g++ -S -v -mcpu=arm8 -mapcs-32
 > -mlittle-endian -ansi -nostdinc -fno-implicit-templates -DVXW_EXPLICIT_TEMPLATES
 > -O2 -mno-sched-prolog -I/usr/wind/target/h -DCPU=ARMARCH4 -DARMEL -fno-exceptions
 > -o /tmp/ttt-bad.s PlotFile.cpp
 > Reading specs from
 > /usr/wind/host/x86-freebsd/lib/gcc-lib/arm-wrs-vxworks/3.1/specs
 > Configured with: ../configure --prefix=/usr/wind/host/x86-freebsd
 > --target=arm-wrs-vxworks
 > Thread model: vxworks
 > gcc version 3.1 20010525 (experimental)
 >  /usr/wind/host/x86-freebsd/lib/gcc-lib/arm-wrs-vxworks/3.1/cc1plus -nostdinc -v
 > -I/usr/wind/target/h -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0
 > -D__vxworks -D__arm__ -D__svr4__ -Acpu=arm -Amachine=arm -D__CHAR_UNSIGNED__
 > -D__OPTIMIZE__ -D__STDC_HOSTED__=1 -D__ARM_ARCH_4__ -D__APCS_32__ -D__ARMEL__
 > -D__CPU__=ARMARCH4 -D__arm__ -DVXW_EXPLICIT_TEMPLATES -DCPU=ARMARCH4 -DARMEL
 > PlotFile.cpp -D__GNUG__=3 -D_GNU_SOURCE -D__DEPRECATED -D__GXX_ABI_VERSION=100
 > -D__STRICT_ANSI__ -trigraphs -$ -quiet -dumpbase PlotFile.cpp -mcpu=arm8 -mapcs-32
 > -mlittle-endian -mno-sched-prolog -ansi -O2 -ansi -version -fno-implicit-templates
 > -fno-exceptions -o /tmp/ttt-bad.s
 > GNU CPP version 3.1 20010525 (experimental) (cpplib) (ARM/COFF)
 > GNU C++ version 3.1 20010525 (experimental) (arm-wrs-vxworks)
 >  compiled by GNU C version 2.95.3 [FreeBSD] 20010315 (release).
 > #include "..." search starts here:
 > #include <...> search starts here:
 >  /usr/wind/target/h
 > End of search list.
 > 
 > 
 > [root@blue libstdcxx]# arm-wrs-vxworks-g++ -E -v -mcpu=arm8 -mapcs-32
 > -mlittle-endian -ansi -nostdinc -fno-implicit-templates -DVXW_EXPLICIT_TEMPLATES
 > -O2 -mno-sched-prolog -I/usr/wind/target/h -DCPU=ARMARCH4 -DARMEL -fno-exceptions
 > -o /tmp/ttt.ii PlotFile.cpp
 > Reading specs from
 > /usr/wind/host/x86-freebsd/lib/gcc-lib/arm-wrs-vxworks/3.1/specs
 > Configured with: ../configure --prefix=/usr/wind/host/x86-freebsd
 > --target=arm-wrs-vxworks
 > Thread model: vxworks
 > gcc version 3.1 20010525 (experimental)
 >  /usr/wind/host/x86-freebsd/lib/gcc-lib/arm-wrs-vxworks/3.1/cpp0 -lang-c++
 > -D_GNU_SOURCE -D__GNUG__=3 -D__DEPRECATED -D__GXX_ABI_VERSION=100
 > -D__STRICT_ANSI__ -trigraphs -$ -nostdinc -v -I/usr/wind/target/h -D__GNUC__=3
 > -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__vxworks -D__arm__ -D__svr4__
 > -Acpu=arm -Amachine=arm -D__CHAR_UNSIGNED__ -D__OPTIMIZE__ -D__STDC_HOSTED__=1
 > -D__ARM_ARCH_4__ -D__APCS_32__ -D__ARMEL__ -D__CPU__=ARMARCH4 -D__arm__
 > -DVXW_EXPLICIT_TEMPLATES -DCPU=ARMARCH4 -DARMEL PlotFile.cpp -o /tmp/ttt.ii
 > GNU CPP version 3.1 20010525 (experimental) (cpplib) (ARM/COFF)
 > #include "..." search starts here:
 > #include <...> search starts here:
 >  /usr/wind/target/h
 > End of search list.
 > 
 > [root@blue libstdcxx]# arm-wrs-vxworks-g++ -S -v -mcpu=arm8 -mapcs-32
 > -mlittle-endian -ansi -nostdinc -fno-implicit-templates -DVXW_EXPLICIT_TEMPLATES
 > -O2 -mno-sched-prolog -I/usr/wind/target/h -DCPU=ARMARCH4 -DARMEL -fno-exceptions
 > -o /tmp/ttt.s /tmp/ttt.ii
 > Reading specs from
 > /usr/wind/host/x86-freebsd/lib/gcc-lib/arm-wrs-vxworks/3.1/specs
 > Configured with: ../configure --prefix=/usr/wind/host/x86-freebsd
 > --target=arm-wrs-vxworks
 > Thread model: vxworks
 > gcc version 3.1 20010525 (experimental)
 >  /usr/wind/host/x86-freebsd/lib/gcc-lib/arm-wrs-vxworks/3.1/cc1plus -fpreprocessed
 > /tmp/ttt.ii -quiet -dumpbase ttt.ii -mcpu=arm8 -mapcs-32 -mlittle-endian
 > -mno-sched-prolog -ansi -O2 -ansi -version -fno-implicit-templates -fno-exceptions
 > -o /tmp/ttt.s
 > GNU CPP version 3.1 20010525 (experimental) (cpplib) (ARM/COFF)
 > GNU C++ version 3.1 20010525 (experimental) (arm-wrs-vxworks)
 >  compiled by GNU C version 2.95.3 [FreeBSD] 20010315 (release).