Text 5618, 106 rader
Skriven 2006-04-04 22:03:00 av Paul Rogers (1:105/360.0)
     Kommentar till en text av Maurice Kinal
Ärende: Multiple GCC versions
=============================
Here's the evidence I have so far.  (Can you suggest the proper
syntax fix for hello.cpp?)
###################
$ cat hello.cpp
#include <iostream>

int main ()
{
  cout << "Hello Works!\n";
  return 0;
}
$/opt/gcc-3.3.4/bin/c++ -v hello.cpp
Reading specs from /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/s\
pecs
Configured with: ../gcc-3.3.4/configure --prefix=/opt/gcc-3.3.4 --enabl\
e-shared --enable-threads=posix --enable-languages=c,c++
Thread model: posix
gcc version 3.3.4
 /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/cc1plus -quiet -v -\
D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=4 -D_GNU_SOURCE he\
llo.cpp -D__GNUG__=3 -quiet -dumpbase hello.cpp -auxbase hello -version\
 -o /tmp/ccOPYAyt.s
GNU C++ version 3.3.4 (i586-pc-linux-gnu)
 compiled by GNU C version 3.3.4.
GGC heuristics: --param ggc-min-expand=34 --param ggc-min-heapsize=7758
ignoring nonexistent directory "/opt/gcc-3.3.4/i586-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /opt/gcc-3.3.4/include/c++/3.3.4
 /opt/gcc-3.3.4/include/c++/3.3.4/i586-pc-linux-gnu
 /opt/gcc-3.3.4/include/c++/3.3.4/backward
 /usr/local/include
 /opt/gcc-3.3.4/include
 /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/include
 /usr/include
End of search list.
hello.cpp: In function `int main()':
hello.cpp:5: error: `cout' undeclared (first use this function)
hello.cpp:5: error: (Each undeclared identifier is reported only once for each 
   function it appears in.)
######## This is the test Sergey suggested at one point. ########
$cat first.cpp
#include <algorithm>
main(void) {
    std::pair<int, int> a;
    a.first=7;
}
$/opt/gcc-3.3.4/bin/c++ -v first.cpp
Reading specs from /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/s\
pecs
Configured with: ../gcc-3.3.4/configure --prefix=/opt/gcc-3.3.4 --enable\
-shared --enable-threads=posix --enable-languages=c,c++
Thread model: posix
gcc version 3.3.4
 /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/cc1plus -quiet -v -D\
__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=4 -D_GNU_SOURCE firs\
t.cpp -D__GNUG__=3 -quiet -dumpbase first.cpp -auxbase first -version -o\
 /tmp/ccYguTlg.s
GNU C++ version 3.3.4 (i586-pc-linux-gnu)
 compiled by GNU C version 3.3.4.
GGC heuristics: --param ggc-min-expand=34 --param ggc-min-heapsize=7758
ignoring nonexistent directory "/opt/gcc-3.3.4/i586-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /opt/gcc-3.3.4/include/c++/3.3.4
 /opt/gcc-3.3.4/include/c++/3.3.4/i586-pc-linux-gnu
 /opt/gcc-3.3.4/include/c++/3.3.4/backward
 /usr/local/include
 /opt/gcc-3.3.4/include
 /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/include
 /usr/include
End of search list.
 as -V -Qy -o /tmp/ccerKvT1.o /tmp/ccYguTlg.s
GNU assembler version 2.15.94.0.2.2 (i586-pc-linux-gnu) using BFD versi
on 2.15.94.0.2.2 20041220
 /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/collect2 --eh-frame\
-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 /usr/lib/crt1.o /us\
r/lib/crti.o /opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/crtbegi\
n.o -L/opt/gcc-3.3.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4 -L/opt/gcc-3.3\
.4/lib/gcc-lib/i586-pc-linux-gnu/3.3.4/../../.. /tmp/ccerKvT1.o -lstdc+\
+ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /opt/gcc-3.3.4/lib/gcc-lib/i586-p\
c-linux-gnu/3.3.4/crtend.o /usr/lib/crtn.o
$ldd a.out
 linux-gate.so.1 =>  (0xffffe000)
 libstdc++.so.5 => not found
####### Of course not.  I don't want it found! #######
####### Evidence it isn't using what I want. #######
 libm.so.6 => /lib/libm.so.6 (0xb7fc1000)
 libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0xb7fb8000)
 libc.so.6 => /lib/libc.so.6 (0xb7eaa000)
 /lib/ld-linux.so.2 (0xb7fec000)

Just using the old compiler isn't enough, and with KDE's complex
Makefile(s) I can't be sure just what would be in the -Iyadayada(s).
So I'm not proceeding from here.


Paul Rogers, paulgrogers@yahoo.com                       -o)
http://www.angelfire.com/or/paulrogers                   /\\
Rogers' Second Law: Everything you do communicates.     _\_V

... Network Management is like herding cats.
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