[STDCXX-737] Configure tests might be compiled twice.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.1.2, 4.1.3, 4.1.4, 4.2.0
• Fix Version/s: 4.2.1
• Component/s: Configuration

Environment

unix

• Severity: Incorrect Behavior
• Assignee: Farid Zaripov
• Reporter: Farid Zaripov
• Created: 20/Feb/08 18:28
• Updated: 21/Feb/08 15:19
• Resolved: 21/Feb/08 14:57

Description

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.

Issue Links

• relates to: STDCXX-739 Rewrite the GNUMakefile.cfg as a plain shell script to use the same algorithm of building configuration tests on Windows and Unix.