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From "Farid Zaripov (JIRA)" <j...@apache.org>
Subject [jira] Created: (STDCXX-737) Configure tests might be compiled twice.
Date Wed, 20 Feb 2008 18:29:43 GMT
Configure tests might be compiled twice.
----------------------------------------

                 Key: STDCXX-737
                 URL: https://issues.apache.org/jira/browse/STDCXX-737
             Project: C++ Standard Library
          Issue Type: Bug
          Components: Configuration
    Affects Versions: 4.2.0, 4.1.4, 4.1.3, 4.1.2
         Environment: unix
            Reporter: Farid Zaripov


>From http://www.nabble.com/forum/Permalink.jtp?root=15579207&post=15593021&page=y
:

  I made this change in GNUmakefile because the
EXTERN_FUNCTION_TEMPLATE.cpp
config test has compiled twice on my gcc/Linux:

1) first it was not linked with extern_function_template_imp.o and due
to this
the macro _RWSTD_NO_EXTERN_FUNCTION_TEMPLATE is defined in config.h

config.log:
---------
...
gcc -D_RWSTDDEBUG -pthread -I. -pedantic -nostdinc++ -g  -W -Wall
-Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long
-Wcast-align  -c
/usr/src/trunk/etc/config/src/extern_function_template_imp.cpp -o
extern_function_template_imp.o
gcc -D_RWSTDDEBUG -pthread -I. -pedantic -nostdinc++ -g  -W -Wall
-Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long
-Wcast-align  -c
/usr/src/trunk/etc/config/src/EXTERN_FUNCTION_TEMPLATE.cpp -o
EXTERN_FUNCTION_TEMPLATE.o
gcc EXTERN_FUNCTION_TEMPLATE.o -pthread  -lm -lsupc++  -o
EXTERN_FUNCTION_TEMPLATE
EXTERN_FUNCTION_TEMPLATE.o(.text+0x26): In function `main':
/usr/src/trunk/etc/config/src/EXTERN_FUNCTION_TEMPLATE.cpp:47: undefined
reference to `S<int> foobar<int>(S<int>)'
collect2: ld returned 1 exit status
...
---------

config.h:
---------
...
// #define _RWSTD_NO_extern_function_template_imp
#define _RWSTD_NO_EXTERN_FUNCTION_TEMPLATE
...
---------

2) second it was linked with extern_function_template_imp.o and the
config.h contains the second entry, where
_RWSTD_NO_EXTERN_FUNCTION_TEMPLATE define is commented

config.log:
---------
...gcc -D_RWSTDDEBUG -pthread -I. -pedantic -nostdinc++ -g  -W -Wall
-Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long
-Wcast-align  -c
/usr/src/trunk/etc/config/src/EXTERN_FUNCTION_TEMPLATE.cpp -o
EXTERN_FUNCTION_TEMPLATE.o
gcc EXTERN_FUNCTION_TEMPLATE.o -pthread extern_function_template_imp.o
-lm -lsupc++  -o EXTERN_FUNCTION_TEMPLATE
./EXTERN_FUNCTION_TEMPLATE
...
---------

config.h:
---------
...
// #define _RWSTD_NO_EXTERN_FUNCTION_TEMPLATE
...
---------

  As a result the _RWSTD_NO_EXTERN_FUNCTION_TEMPLATE macro is defined
while gcc supports the extern function templates.

  The first compilation is come from "%.o: %.cpp" rule, and the second -
from "config:" rule. 

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